NET Appropriate network support is enabled.
NUMA NUMA support is enabled.
NFS Appropriate NFS support is enabled.
+ OF Devicetree is enabled.
OSS OSS sound support is enabled.
PV_OPS A paravirtualized kernel is enabled.
PARIDE The ParIDE (parallel port IDE) subsystem is enabled.
This can be set from sysctl after boot.
See Documentation/admin-guide/sysctl/vm.rst for details.
+ of_devlink [OF, KNL] Create device links between consumer and
+ supplier devices by scanning the devictree to infer the
+ consumer/supplier relationships. A consumer device
+ will not be probed until all the supplier devices have
+ probed successfully.
+
ohci1394_dma=early [HW] enable debugging via the ohci1394 driver.
See Documentation/debugging-via-ohci1394.txt for more
info.
:c:func:`driver_bound()`.)
* Before a consumer device is probed, presence of supplier drivers is
- verified by checking that links to suppliers are in ``DL_STATE_AVAILABLE``
+ verified by checking the consumer device is not in the wait_for_suppliers
+ list and by checking that links to suppliers are in ``DL_STATE_AVAILABLE``
state. The state of the links is updated to ``DL_STATE_CONSUMER_PROBE``.
(Call to :c:func:`device_links_check_suppliers()` from
:c:func:`really_probe()`.)
devm_ioremap_nocache()
devm_ioremap_wc()
devm_ioremap_resource() : checks resource, requests memory region, ioremaps
+ devm_ioremap_resource_wc()
+ devm_platform_ioremap_resource() : calls devm_ioremap_resource() for platform device
+ devm_platform_ioremap_resource_wc()
+ devm_platform_ioremap_resource_byname()
devm_iounmap()
pcim_iomap()
pcim_iomap_regions() : do request_region() and iomap() on multiple BARs
the driver did not bind to this device, in which case it should have
released all resources it allocated::
+ void (*sync_state)(struct device *dev);
+
+sync_state is called only once for a device. It's called when all the consumer
+devices of the device have successfully probed. The list of consumers of the
+device is obtained by looking at the device links connecting that device to its
+consumer devices.
+
+The first attempt to call sync_state() is made during late_initcall_sync() to
+give firmware and drivers time to link devices to each other. During the first
+attempt at calling sync_state(), if all the consumers of the device at that
+point in time have already probed successfully, sync_state() is called right
+away. If there are no consumers of the device during the first attempt, that
+too is considered as "all consumers of the device have probed" and sync_state()
+is called right away.
+
+If during the first attempt at calling sync_state() for a device, there are
+still consumers that haven't probed successfully, the sync_state() call is
+postponed and reattempted in the future only when one or more consumers of the
+device probe successfully. If during the reattempt, the driver core finds that
+there are one or more consumers of the device that haven't probed yet, then
+sync_state() call is postponed again.
+
+A typical use case for sync_state() is to have the kernel cleanly take over
+management of devices from the bootloader. For example, if a device is left on
+and at a particular hardware configuration by the bootloader, the device's
+driver might need to keep the device in the boot configuration until all the
+consumers of the device have probed. Once all the consumers of the device have
+probed, the device's driver can synchronize the hardware state of the device to
+match the aggregated software state requested by all the consumers. Hence the
+name sync_state().
+
+While obvious examples of resources that can benefit from sync_state() include
+resources such as regulator, sync_state() can also be useful for complex
+resources like IOMMUs. For example, IOMMUs with multiple consumers (devices
+whose addresses are remapped by the IOMMU) might need to keep their mappings
+fixed at (or additive to) the boot configuration until all its consumers have
+probed.
+
+While the typical use case for sync_state() is to have the kernel cleanly take
+over management of devices from the bootloader, the usage of sync_state() is
+not restricted to that. Use it whenever it makes sense to take an action after
+all the consumers of a device have probed.
+
int (*remove) (struct device *dev);
remove is called to unbind a driver from a device. This may be
for simple situations. Files containing a single integer value can be
created with any of:
- struct dentry *debugfs_create_u8(const char *name, umode_t mode,
- struct dentry *parent, u8 *value);
- struct dentry *debugfs_create_u16(const char *name, umode_t mode,
- struct dentry *parent, u16 *value);
+ void debugfs_create_u8(const char *name, umode_t mode,
+ struct dentry *parent, u8 *value);
+ void debugfs_create_u16(const char *name, umode_t mode,
+ struct dentry *parent, u16 *value);
struct dentry *debugfs_create_u32(const char *name, umode_t mode,
struct dentry *parent, u32 *value);
- struct dentry *debugfs_create_u64(const char *name, umode_t mode,
- struct dentry *parent, u64 *value);
+ void debugfs_create_u64(const char *name, umode_t mode,
+ struct dentry *parent, u64 *value);
These files support both reading and writing the given value; if a specific
file should not be written to, simply set the mode bits accordingly. The
values in these files are in decimal; if hexadecimal is more appropriate,
the following functions can be used instead:
- struct dentry *debugfs_create_x8(const char *name, umode_t mode,
- struct dentry *parent, u8 *value);
- struct dentry *debugfs_create_x16(const char *name, umode_t mode,
- struct dentry *parent, u16 *value);
- struct dentry *debugfs_create_x32(const char *name, umode_t mode,
- struct dentry *parent, u32 *value);
- struct dentry *debugfs_create_x64(const char *name, umode_t mode,
- struct dentry *parent, u64 *value);
+ void debugfs_create_x8(const char *name, umode_t mode,
+ struct dentry *parent, u8 *value);
+ void debugfs_create_x16(const char *name, umode_t mode,
+ struct dentry *parent, u16 *value);
+ void debugfs_create_x32(const char *name, umode_t mode,
+ struct dentry *parent, u32 *value);
+ void debugfs_create_x64(const char *name, umode_t mode,
+ struct dentry *parent, u64 *value);
These functions are useful as long as the developer knows the size of the
value to be exported. Some types can have different widths on different
-architectures, though, complicating the situation somewhat. There is a
-function meant to help out in one special case:
+architectures, though, complicating the situation somewhat. There are
+functions meant to help out in such special cases:
- struct dentry *debugfs_create_size_t(const char *name, umode_t mode,
- struct dentry *parent,
- size_t *value);
+ void debugfs_create_size_t(const char *name, umode_t mode,
+ struct dentry *parent, size_t *value);
As might be expected, this function will create a debugfs file to represent
a variable of type size_t.
+Similarly, there are helpers for variables of type unsigned long, in decimal
+and hexadecimal:
+
+ struct dentry *debugfs_create_ulong(const char *name, umode_t mode,
+ struct dentry *parent,
+ unsigned long *value);
+ void debugfs_create_xul(const char *name, umode_t mode,
+ struct dentry *parent, unsigned long *value);
+
Boolean values can be placed in debugfs with:
struct dentry *debugfs_create_bool(const char *name, umode_t mode,
Also, atomic_t values can be placed in debugfs with:
- struct dentry *debugfs_create_atomic_t(const char *name, umode_t mode,
- struct dentry *parent, atomic_t *value)
+ void debugfs_create_atomic_t(const char *name, umode_t mode,
+ struct dentry *parent, atomic_t *value)
A read of this file will get atomic_t values, and a write of this file
will set atomic_t values.
struct dtl {
struct dtl_entry *buf;
- struct dentry *file;
int cpu;
int buf_entries;
u64 last_idx;
static struct dentry *dtl_dir;
-static int dtl_setup_file(struct dtl *dtl)
+static void dtl_setup_file(struct dtl *dtl)
{
char name[10];
sprintf(name, "cpu-%d", dtl->cpu);
- dtl->file = debugfs_create_file(name, 0400, dtl_dir, dtl, &dtl_fops);
- if (!dtl->file)
- return -ENOMEM;
-
- return 0;
+ debugfs_create_file(name, 0400, dtl_dir, dtl, &dtl_fops);
}
static int dtl_init(void)
{
- struct dentry *event_mask_file, *buf_entries_file;
- int rc, i;
+ int i;
if (!firmware_has_feature(FW_FEATURE_SPLPAR))
return -ENODEV;
/* set up common debugfs structure */
- rc = -ENOMEM;
dtl_dir = debugfs_create_dir("dtl", powerpc_debugfs_root);
- if (!dtl_dir) {
- printk(KERN_WARNING "%s: can't create dtl root dir\n",
- __func__);
- goto err;
- }
- event_mask_file = debugfs_create_x8("dtl_event_mask", 0600,
- dtl_dir, &dtl_event_mask);
- buf_entries_file = debugfs_create_u32("dtl_buf_entries", 0400,
- dtl_dir, &dtl_buf_entries);
-
- if (!event_mask_file || !buf_entries_file) {
- printk(KERN_WARNING "%s: can't create dtl files\n", __func__);
- goto err_remove_dir;
- }
+ debugfs_create_x8("dtl_event_mask", 0600, dtl_dir, &dtl_event_mask);
+ debugfs_create_u32("dtl_buf_entries", 0400, dtl_dir, &dtl_buf_entries);
/* set up the per-cpu log structures */
for_each_possible_cpu(i) {
spin_lock_init(&dtl->lock);
dtl->cpu = i;
- rc = dtl_setup_file(dtl);
- if (rc)
- goto err_remove_dir;
+ dtl_setup_file(dtl);
}
return 0;
-
-err_remove_dir:
- debugfs_remove_recursive(dtl_dir);
-err:
- return rc;
}
machine_arch_initcall(pseries, dtl_init);
static int __init hcall_inst_init(void)
{
struct dentry *hcall_root;
- struct dentry *hcall_file;
char cpu_name_buf[CPU_NAME_BUF_SIZE];
int cpu;
}
hcall_root = debugfs_create_dir(HCALL_ROOT_DIR, NULL);
- if (!hcall_root)
- return -ENOMEM;
for_each_possible_cpu(cpu) {
snprintf(cpu_name_buf, CPU_NAME_BUF_SIZE, "cpu%d", cpu);
- hcall_file = debugfs_create_file(cpu_name_buf, 0444,
- hcall_root,
- per_cpu(hcall_stats, cpu),
- &hcall_inst_seq_fops);
- if (!hcall_file)
- return -ENOMEM;
+ debugfs_create_file(cpu_name_buf, 0444, hcall_root,
+ per_cpu(hcall_stats, cpu),
+ &hcall_inst_seq_fops);
}
return 0;
return 0;
vpa_dir = debugfs_create_dir("vpa", powerpc_debugfs_root);
- if (!vpa_dir) {
- pr_warn("%s: can't create vpa root dir\n", __func__);
- return -ENOMEM;
- }
/* set up the per-cpu vpa file*/
for_each_possible_cpu(i) {
- struct dentry *d;
-
sprintf(name, "cpu-%ld", i);
-
- d = debugfs_create_file(name, 0400, vpa_dir, (void *)i,
- &vpa_fops);
- if (!d) {
- pr_warn("%s: can't create per-cpu vpa file\n",
- __func__);
- return -ENOMEM;
- }
+ debugfs_create_file(name, 0400, vpa_dir, (void *)i, &vpa_fops);
}
return 0;
# Makefile for the Linux SuperH-specific device drivers.
#
-obj-y += dma/
+obj-y += dma/ platform_early.o
obj-$(CONFIG_PCI) += pci/
obj-$(CONFIG_SUPERHYWAY) += superhyway/
--- /dev/null
+// SPDX--License-Identifier: GPL-2.0
+
+#include <asm/platform_early.h>
+#include <linux/mod_devicetable.h>
+#include <linux/pm.h>
+
+static __initdata LIST_HEAD(sh_early_platform_driver_list);
+static __initdata LIST_HEAD(sh_early_platform_device_list);
+
+static const struct platform_device_id *
+platform_match_id(const struct platform_device_id *id,
+ struct platform_device *pdev)
+{
+ while (id->name[0]) {
+ if (strcmp(pdev->name, id->name) == 0) {
+ pdev->id_entry = id;
+ return id;
+ }
+ id++;
+ }
+ return NULL;
+}
+
+static int platform_match(struct device *dev, struct device_driver *drv)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct platform_driver *pdrv = to_platform_driver(drv);
+
+ /* When driver_override is set, only bind to the matching driver */
+ if (pdev->driver_override)
+ return !strcmp(pdev->driver_override, drv->name);
+
+ /* Then try to match against the id table */
+ if (pdrv->id_table)
+ return platform_match_id(pdrv->id_table, pdev) != NULL;
+
+ /* fall-back to driver name match */
+ return (strcmp(pdev->name, drv->name) == 0);
+}
+
+#ifdef CONFIG_PM
+static void device_pm_init_common(struct device *dev)
+{
+ if (!dev->power.early_init) {
+ spin_lock_init(&dev->power.lock);
+ dev->power.qos = NULL;
+ dev->power.early_init = true;
+ }
+}
+
+static void pm_runtime_early_init(struct device *dev)
+{
+ dev->power.disable_depth = 1;
+ device_pm_init_common(dev);
+}
+#else
+static void pm_runtime_early_init(struct device *dev) {}
+#endif
+
+/**
+ * sh_early_platform_driver_register - register early platform driver
+ * @epdrv: sh_early_platform driver structure
+ * @buf: string passed from early_param()
+ *
+ * Helper function for sh_early_platform_init() / sh_early_platform_init_buffer()
+ */
+int __init sh_early_platform_driver_register(struct sh_early_platform_driver *epdrv,
+ char *buf)
+{
+ char *tmp;
+ int n;
+
+ /* Simply add the driver to the end of the global list.
+ * Drivers will by default be put on the list in compiled-in order.
+ */
+ if (!epdrv->list.next) {
+ INIT_LIST_HEAD(&epdrv->list);
+ list_add_tail(&epdrv->list, &sh_early_platform_driver_list);
+ }
+
+ /* If the user has specified device then make sure the driver
+ * gets prioritized. The driver of the last device specified on
+ * command line will be put first on the list.
+ */
+ n = strlen(epdrv->pdrv->driver.name);
+ if (buf && !strncmp(buf, epdrv->pdrv->driver.name, n)) {
+ list_move(&epdrv->list, &sh_early_platform_driver_list);
+
+ /* Allow passing parameters after device name */
+ if (buf[n] == '\0' || buf[n] == ',')
+ epdrv->requested_id = -1;
+ else {
+ epdrv->requested_id = simple_strtoul(&buf[n + 1],
+ &tmp, 10);
+
+ if (buf[n] != '.' || (tmp == &buf[n + 1])) {
+ epdrv->requested_id = EARLY_PLATFORM_ID_ERROR;
+ n = 0;
+ } else
+ n += strcspn(&buf[n + 1], ",") + 1;
+ }
+
+ if (buf[n] == ',')
+ n++;
+
+ if (epdrv->bufsize) {
+ memcpy(epdrv->buffer, &buf[n],
+ min_t(int, epdrv->bufsize, strlen(&buf[n]) + 1));
+ epdrv->buffer[epdrv->bufsize - 1] = '\0';
+ }
+ }
+
+ return 0;
+}
+
+/**
+ * sh_early_platform_add_devices - adds a number of early platform devices
+ * @devs: array of early platform devices to add
+ * @num: number of early platform devices in array
+ *
+ * Used by early architecture code to register early platform devices and
+ * their platform data.
+ */
+void __init sh_early_platform_add_devices(struct platform_device **devs, int num)
+{
+ struct device *dev;
+ int i;
+
+ /* simply add the devices to list */
+ for (i = 0; i < num; i++) {
+ dev = &devs[i]->dev;
+
+ if (!dev->devres_head.next) {
+ pm_runtime_early_init(dev);
+ INIT_LIST_HEAD(&dev->devres_head);
+ list_add_tail(&dev->devres_head,
+ &sh_early_platform_device_list);
+ }
+ }
+}
+
+/**
+ * sh_early_platform_driver_register_all - register early platform drivers
+ * @class_str: string to identify early platform driver class
+ *
+ * Used by architecture code to register all early platform drivers
+ * for a certain class. If omitted then only early platform drivers
+ * with matching kernel command line class parameters will be registered.
+ */
+void __init sh_early_platform_driver_register_all(char *class_str)
+{
+ /* The "class_str" parameter may or may not be present on the kernel
+ * command line. If it is present then there may be more than one
+ * matching parameter.
+ *
+ * Since we register our early platform drivers using early_param()
+ * we need to make sure that they also get registered in the case
+ * when the parameter is missing from the kernel command line.
+ *
+ * We use parse_early_options() to make sure the early_param() gets
+ * called at least once. The early_param() may be called more than
+ * once since the name of the preferred device may be specified on
+ * the kernel command line. sh_early_platform_driver_register() handles
+ * this case for us.
+ */
+ parse_early_options(class_str);
+}
+
+/**
+ * sh_early_platform_match - find early platform device matching driver
+ * @epdrv: early platform driver structure
+ * @id: id to match against
+ */
+static struct platform_device * __init
+sh_early_platform_match(struct sh_early_platform_driver *epdrv, int id)
+{
+ struct platform_device *pd;
+
+ list_for_each_entry(pd, &sh_early_platform_device_list, dev.devres_head)
+ if (platform_match(&pd->dev, &epdrv->pdrv->driver))
+ if (pd->id == id)
+ return pd;
+
+ return NULL;
+}
+
+/**
+ * sh_early_platform_left - check if early platform driver has matching devices
+ * @epdrv: early platform driver structure
+ * @id: return true if id or above exists
+ */
+static int __init sh_early_platform_left(struct sh_early_platform_driver *epdrv,
+ int id)
+{
+ struct platform_device *pd;
+
+ list_for_each_entry(pd, &sh_early_platform_device_list, dev.devres_head)
+ if (platform_match(&pd->dev, &epdrv->pdrv->driver))
+ if (pd->id >= id)
+ return 1;
+
+ return 0;
+}
+
+/**
+ * sh_early_platform_driver_probe_id - probe drivers matching class_str and id
+ * @class_str: string to identify early platform driver class
+ * @id: id to match against
+ * @nr_probe: number of platform devices to successfully probe before exiting
+ */
+static int __init sh_early_platform_driver_probe_id(char *class_str,
+ int id,
+ int nr_probe)
+{
+ struct sh_early_platform_driver *epdrv;
+ struct platform_device *match;
+ int match_id;
+ int n = 0;
+ int left = 0;
+
+ list_for_each_entry(epdrv, &sh_early_platform_driver_list, list) {
+ /* only use drivers matching our class_str */
+ if (strcmp(class_str, epdrv->class_str))
+ continue;
+
+ if (id == -2) {
+ match_id = epdrv->requested_id;
+ left = 1;
+
+ } else {
+ match_id = id;
+ left += sh_early_platform_left(epdrv, id);
+
+ /* skip requested id */
+ switch (epdrv->requested_id) {
+ case EARLY_PLATFORM_ID_ERROR:
+ case EARLY_PLATFORM_ID_UNSET:
+ break;
+ default:
+ if (epdrv->requested_id == id)
+ match_id = EARLY_PLATFORM_ID_UNSET;
+ }
+ }
+
+ switch (match_id) {
+ case EARLY_PLATFORM_ID_ERROR:
+ pr_warn("%s: unable to parse %s parameter\n",
+ class_str, epdrv->pdrv->driver.name);
+ /* fall-through */
+ case EARLY_PLATFORM_ID_UNSET:
+ match = NULL;
+ break;
+ default:
+ match = sh_early_platform_match(epdrv, match_id);
+ }
+
+ if (match) {
+ /*
+ * Set up a sensible init_name to enable
+ * dev_name() and others to be used before the
+ * rest of the driver core is initialized.
+ */
+ if (!match->dev.init_name && slab_is_available()) {
+ if (match->id != -1)
+ match->dev.init_name =
+ kasprintf(GFP_KERNEL, "%s.%d",
+ match->name,
+ match->id);
+ else
+ match->dev.init_name =
+ kasprintf(GFP_KERNEL, "%s",
+ match->name);
+
+ if (!match->dev.init_name)
+ return -ENOMEM;
+ }
+
+ if (epdrv->pdrv->probe(match))
+ pr_warn("%s: unable to probe %s early.\n",
+ class_str, match->name);
+ else
+ n++;
+ }
+
+ if (n >= nr_probe)
+ break;
+ }
+
+ if (left)
+ return n;
+ else
+ return -ENODEV;
+}
+
+/**
+ * sh_early_platform_driver_probe - probe a class of registered drivers
+ * @class_str: string to identify early platform driver class
+ * @nr_probe: number of platform devices to successfully probe before exiting
+ * @user_only: only probe user specified early platform devices
+ *
+ * Used by architecture code to probe registered early platform drivers
+ * within a certain class. For probe to happen a registered early platform
+ * device matching a registered early platform driver is needed.
+ */
+int __init sh_early_platform_driver_probe(char *class_str,
+ int nr_probe,
+ int user_only)
+{
+ int k, n, i;
+
+ n = 0;
+ for (i = -2; n < nr_probe; i++) {
+ k = sh_early_platform_driver_probe_id(class_str, i, nr_probe - n);
+
+ if (k < 0)
+ break;
+
+ n += k;
+
+ if (user_only)
+ break;
+ }
+
+ return n;
+}
+
+/**
+ * sh_early_platform_cleanup - clean up early platform code
+ */
+static int __init sh_early_platform_cleanup(void)
+{
+ struct platform_device *pd, *pd2;
+
+ /* clean up the devres list used to chain devices */
+ list_for_each_entry_safe(pd, pd2, &sh_early_platform_device_list,
+ dev.devres_head) {
+ list_del(&pd->dev.devres_head);
+ memset(&pd->dev.devres_head, 0, sizeof(pd->dev.devres_head));
+ }
+
+ return 0;
+}
+/*
+ * This must happen once after all early devices are probed but before probing
+ * real platform devices.
+ */
+subsys_initcall(sh_early_platform_cleanup);
--- /dev/null
+/* SPDX--License-Identifier: GPL-2.0 */
+
+#ifndef __PLATFORM_EARLY__
+#define __PLATFORM_EARLY__
+
+#include <linux/types.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/slab.h>
+
+struct sh_early_platform_driver {
+ const char *class_str;
+ struct platform_driver *pdrv;
+ struct list_head list;
+ int requested_id;
+ char *buffer;
+ int bufsize;
+};
+
+#define EARLY_PLATFORM_ID_UNSET -2
+#define EARLY_PLATFORM_ID_ERROR -3
+
+extern int sh_early_platform_driver_register(struct sh_early_platform_driver *epdrv,
+ char *buf);
+extern void sh_early_platform_add_devices(struct platform_device **devs, int num);
+
+static inline int is_sh_early_platform_device(struct platform_device *pdev)
+{
+ return !pdev->dev.driver;
+}
+
+extern void sh_early_platform_driver_register_all(char *class_str);
+extern int sh_early_platform_driver_probe(char *class_str,
+ int nr_probe, int user_only);
+
+#define sh_early_platform_init(class_string, platdrv) \
+ sh_early_platform_init_buffer(class_string, platdrv, NULL, 0)
+
+#ifndef MODULE
+#define sh_early_platform_init_buffer(class_string, platdrv, buf, bufsiz) \
+static __initdata struct sh_early_platform_driver early_driver = { \
+ .class_str = class_string, \
+ .buffer = buf, \
+ .bufsize = bufsiz, \
+ .pdrv = platdrv, \
+ .requested_id = EARLY_PLATFORM_ID_UNSET, \
+}; \
+static int __init sh_early_platform_driver_setup_func(char *buffer) \
+{ \
+ return sh_early_platform_driver_register(&early_driver, buffer); \
+} \
+early_param(class_string, sh_early_platform_driver_setup_func)
+#else /* MODULE */
+#define sh_early_platform_init_buffer(class_string, platdrv, buf, bufsiz) \
+static inline char *sh_early_platform_driver_setup_func(void) \
+{ \
+ return bufsiz ? buf : NULL; \
+}
+#endif /* MODULE */
+
+#endif /* __PLATFORM_EARLY__ */
#include <linux/sh_eth.h>
#include <linux/sh_timer.h>
#include <linux/io.h>
+#include <asm/platform_early.h>
enum {
UNUSED = 0,
/* enable CMT clock */
__raw_writeb(__raw_readb(STBCR3) & ~0x10, STBCR3);
- early_platform_add_devices(sh7619_early_devices,
+ sh_early_platform_add_devices(sh7619_early_devices,
ARRAY_SIZE(sh7619_early_devices));
}
#include <linux/serial.h>
#include <linux/serial_sci.h>
#include <linux/sh_timer.h>
+#include <asm/platform_early.h>
enum {
UNUSED = 0,
void __init plat_early_device_setup(void)
{
- early_platform_add_devices(mxg_early_devices,
+ sh_early_platform_add_devices(mxg_early_devices,
ARRAY_SIZE(mxg_early_devices));
}
#include <linux/serial_sci.h>
#include <linux/sh_timer.h>
#include <linux/io.h>
+#include <asm/platform_early.h>
enum {
UNUSED = 0,
/* enable MTU2 clock */
__raw_writeb(__raw_readb(STBCR3) & ~0x20, STBCR3);
- early_platform_add_devices(sh7201_early_devices,
+ sh_early_platform_add_devices(sh7201_early_devices,
ARRAY_SIZE(sh7201_early_devices));
}
#include <linux/serial_sci.h>
#include <linux/sh_timer.h>
#include <linux/io.h>
+#include <asm/platform_early.h>
enum {
UNUSED = 0,
/* enable MTU2 clock */
__raw_writeb(__raw_readb(STBCR3) & ~0x20, STBCR3);
- early_platform_add_devices(sh7203_early_devices,
+ sh_early_platform_add_devices(sh7203_early_devices,
ARRAY_SIZE(sh7203_early_devices));
}
#include <linux/serial_sci.h>
#include <linux/sh_timer.h>
#include <linux/io.h>
+#include <asm/platform_early.h>
enum {
UNUSED = 0,
/* enable MTU2 clock */
__raw_writeb(__raw_readb(STBCR3) & ~0x20, STBCR3);
- early_platform_add_devices(sh7206_early_devices,
+ sh_early_platform_add_devices(sh7206_early_devices,
ARRAY_SIZE(sh7206_early_devices));
}
#include <linux/usb/r8a66597.h>
#include <linux/sh_timer.h>
#include <linux/io.h>
+#include <asm/platform_early.h>
enum {
UNUSED = 0,
void __init plat_early_device_setup(void)
{
- early_platform_add_devices(sh7264_early_devices,
+ sh_early_platform_add_devices(sh7264_early_devices,
ARRAY_SIZE(sh7264_early_devices));
}
#include <linux/usb/r8a66597.h>
#include <linux/sh_timer.h>
#include <linux/io.h>
+#include <asm/platform_early.h>
enum {
UNUSED = 0,
void __init plat_early_device_setup(void)
{
- early_platform_add_devices(sh7269_early_devices,
+ sh_early_platform_add_devices(sh7269_early_devices,
ARRAY_SIZE(sh7269_early_devices));
}
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/io.h>
+#include <asm/platform_early.h>
/* All SH3 devices are equipped with IRQ0->5 (except sh7708) */
#include <linux/sh_intc.h>
#include <asm/rtc.h>
#include <cpu/serial.h>
+#include <asm/platform_early.h>
enum {
UNUSED = 0,
void __init plat_early_device_setup(void)
{
- early_platform_add_devices(sh7705_early_devices,
+ sh_early_platform_add_devices(sh7705_early_devices,
ARRAY_SIZE(sh7705_early_devices));
}
#include <linux/sh_timer.h>
#include <linux/sh_intc.h>
#include <cpu/serial.h>
+#include <asm/platform_early.h>
enum {
UNUSED = 0,
void __init plat_early_device_setup(void)
{
- early_platform_add_devices(sh770x_early_devices,
+ sh_early_platform_add_devices(sh770x_early_devices,
ARRAY_SIZE(sh770x_early_devices));
}
#include <linux/sh_timer.h>
#include <linux/sh_intc.h>
#include <asm/rtc.h>
+#include <asm/platform_early.h>
enum {
UNUSED = 0,
void __init plat_early_device_setup(void)
{
- early_platform_add_devices(sh7710_early_devices,
+ sh_early_platform_add_devices(sh7710_early_devices,
ARRAY_SIZE(sh7710_early_devices));
}
#include <linux/sh_intc.h>
#include <linux/usb/ohci_pdriver.h>
#include <asm/rtc.h>
+#include <asm/platform_early.h>
#include <cpu/serial.h>
static struct resource rtc_resources[] = {
void __init plat_early_device_setup(void)
{
- early_platform_add_devices(sh7720_early_devices,
+ sh_early_platform_add_devices(sh7720_early_devices,
ARRAY_SIZE(sh7720_early_devices));
}
#include <linux/sh_timer.h>
#include <linux/sh_intc.h>
#include <linux/io.h>
+#include <asm/platform_early.h>
static struct plat_sci_port scif0_platform_data = {
.scscr = SCSCR_REIE,
void __init plat_early_device_setup(void)
{
- early_platform_add_devices(sh4202_early_devices,
+ sh_early_platform_add_devices(sh4202_early_devices,
ARRAY_SIZE(sh4202_early_devices));
}
#include <linux/sh_intc.h>
#include <linux/serial_sci.h>
#include <generated/machtypes.h>
+#include <asm/platform_early.h>
static struct resource rtc_resources[] = {
[0] = {
if (mach_is_rts7751r2d()) {
scif_platform_data.scscr |= SCSCR_CKE1;
dev[0] = &scif_device;
- early_platform_add_devices(dev, 1);
+ sh_early_platform_add_devices(dev, 1);
} else {
dev[0] = &sci_device;
- early_platform_add_devices(dev, 1);
+ sh_early_platform_add_devices(dev, 1);
dev[0] = &scif_device;
- early_platform_add_devices(dev, 1);
+ sh_early_platform_add_devices(dev, 1);
}
- early_platform_add_devices(sh7750_early_devices,
+ sh_early_platform_add_devices(sh7750_early_devices,
ARRAY_SIZE(sh7750_early_devices));
}
#include <linux/sh_intc.h>
#include <linux/serial_sci.h>
#include <linux/io.h>
+#include <asm/platform_early.h>
enum {
UNUSED = 0,
void __init plat_early_device_setup(void)
{
- early_platform_add_devices(sh7760_early_devices,
+ sh_early_platform_add_devices(sh7760_early_devices,
ARRAY_SIZE(sh7760_early_devices));
}
#include <linux/sh_timer.h>
#include <linux/sh_intc.h>
#include <asm/clock.h>
+#include <asm/platform_early.h>
/* Serial */
static struct plat_sci_port scif0_platform_data = {
void __init plat_early_device_setup(void)
{
- early_platform_add_devices(sh7343_early_devices,
+ sh_early_platform_add_devices(sh7343_early_devices,
ARRAY_SIZE(sh7343_early_devices));
}
#include <linux/sh_intc.h>
#include <linux/usb/r8a66597.h>
#include <asm/clock.h>
+#include <asm/platform_early.h>
static struct plat_sci_port scif0_platform_data = {
.scscr = SCSCR_REIE,
void __init plat_early_device_setup(void)
{
- early_platform_add_devices(sh7366_early_devices,
+ sh_early_platform_add_devices(sh7366_early_devices,
ARRAY_SIZE(sh7366_early_devices));
}
#include <asm/clock.h>
#include <asm/mmzone.h>
#include <asm/siu.h>
+#include <asm/platform_early.h>
#include <cpu/dma-register.h>
#include <cpu/sh7722.h>
void __init plat_early_device_setup(void)
{
- early_platform_add_devices(sh7722_early_devices,
+ sh_early_platform_add_devices(sh7722_early_devices,
ARRAY_SIZE(sh7722_early_devices));
}
#include <linux/io.h>
#include <asm/clock.h>
#include <asm/mmzone.h>
+#include <asm/platform_early.h>
#include <cpu/sh7723.h>
/* Serial */
void __init plat_early_device_setup(void)
{
- early_platform_add_devices(sh7723_early_devices,
+ sh_early_platform_add_devices(sh7723_early_devices,
ARRAY_SIZE(sh7723_early_devices));
}
#include <asm/suspend.h>
#include <asm/clock.h>
#include <asm/mmzone.h>
+#include <asm/platform_early.h>
#include <cpu/dma-register.h>
#include <cpu/sh7724.h>
void __init plat_early_device_setup(void)
{
- early_platform_add_devices(sh7724_early_devices,
+ sh_early_platform_add_devices(sh7724_early_devices,
ARRAY_SIZE(sh7724_early_devices));
}
#include <linux/io.h>
#include <asm/clock.h>
#include <asm/irq.h>
+#include <asm/platform_early.h>
#include <cpu/sh7734.h>
/* SCIF */
void __init plat_early_device_setup(void)
{
- early_platform_add_devices(sh7734_early_devices,
+ sh_early_platform_add_devices(sh7734_early_devices,
ARRAY_SIZE(sh7734_early_devices));
}
#include <linux/usb/ohci_pdriver.h>
#include <cpu/dma-register.h>
#include <cpu/sh7757.h>
+#include <asm/platform_early.h>
static struct plat_sci_port scif2_platform_data = {
.scscr = SCSCR_REIE,
void __init plat_early_device_setup(void)
{
- early_platform_add_devices(sh7757_early_devices,
+ sh_early_platform_add_devices(sh7757_early_devices,
ARRAY_SIZE(sh7757_early_devices));
}
#include <linux/io.h>
#include <linux/serial_sci.h>
#include <linux/usb/ohci_pdriver.h>
+#include <asm/platform_early.h>
static struct plat_sci_port scif0_platform_data = {
.scscr = SCSCR_REIE,
void __init plat_early_device_setup(void)
{
- early_platform_add_devices(sh7763_early_devices,
+ sh_early_platform_add_devices(sh7763_early_devices,
ARRAY_SIZE(sh7763_early_devices));
}
#include <linux/sh_timer.h>
#include <linux/sh_intc.h>
#include <linux/io.h>
+#include <asm/platform_early.h>
static struct plat_sci_port scif0_platform_data = {
.scscr = SCSCR_REIE | SCSCR_TOIE,
void __init plat_early_device_setup(void)
{
- early_platform_add_devices(sh7770_early_devices,
+ sh_early_platform_add_devices(sh7770_early_devices,
ARRAY_SIZE(sh7770_early_devices));
}
#include <linux/sh_timer.h>
#include <linux/sh_intc.h>
#include <cpu/dma-register.h>
+#include <asm/platform_early.h>
static struct plat_sci_port scif0_platform_data = {
.scscr = SCSCR_REIE | SCSCR_CKE1,
scif1_platform_data.scscr &= ~SCSCR_CKE1;
}
- early_platform_add_devices(sh7780_early_devices,
+ sh_early_platform_add_devices(sh7780_early_devices,
ARRAY_SIZE(sh7780_early_devices));
}
#include <linux/sh_timer.h>
#include <linux/sh_intc.h>
#include <asm/mmzone.h>
+#include <asm/platform_early.h>
#include <cpu/dma-register.h>
static struct plat_sci_port scif0_platform_data = {
void __init plat_early_device_setup(void)
{
- early_platform_add_devices(sh7785_early_devices,
+ sh_early_platform_add_devices(sh7785_early_devices,
ARRAY_SIZE(sh7785_early_devices));
}
#include <linux/usb/ohci_pdriver.h>
#include <cpu/dma-register.h>
#include <asm/mmzone.h>
+#include <asm/platform_early.h>
static struct plat_sci_port scif0_platform_data = {
.scscr = SCSCR_REIE | SCSCR_CKE1,
void __init plat_early_device_setup(void)
{
- early_platform_add_devices(sh7786_early_devices,
+ sh_early_platform_add_devices(sh7786_early_devices,
ARRAY_SIZE(sh7786_early_devices));
}
#include <linux/sh_intc.h>
#include <cpu/shx3.h>
#include <asm/mmzone.h>
+#include <asm/platform_early.h>
/*
* This intentionally only registers SCIF ports 0, 1, and 3. SCIF 2
void __init plat_early_device_setup(void)
{
- early_platform_add_devices(shx3_early_devices,
+ sh_early_platform_add_devices(shx3_early_devices,
ARRAY_SIZE(shx3_early_devices));
}
#include <linux/mm.h>
#include <linux/sh_timer.h>
#include <asm/addrspace.h>
+#include <asm/platform_early.h>
static struct plat_sci_port scif0_platform_data = {
.flags = UPF_IOREMAP,
void __init plat_early_device_setup(void)
{
- early_platform_add_devices(sh5_early_devices,
+ sh_early_platform_add_devices(sh5_early_devices,
ARRAY_SIZE(sh5_early_devices));
}
#include <asm/mmu_context.h>
#include <asm/mmzone.h>
#include <asm/sparsemem.h>
+#include <asm/platform_early.h>
/*
* Initialize loops_per_jiffy as 10000000 (1000MIPS).
sh_mv_setup();
/* Let earlyprintk output early console messages */
- early_platform_driver_probe("earlyprintk", 1, 1);
+ sh_early_platform_driver_probe("earlyprintk", 1, 1);
#ifdef CONFIG_OF_FLATTREE
#ifdef CONFIG_USE_BUILTIN_DTB
#include <linux/rtc.h>
#include <asm/clock.h>
#include <asm/rtc.h>
+#include <asm/platform_early.h>
static void __init sh_late_time_init(void)
{
* clocksource and the jiffies clocksource is used transparently
* instead. No error handling is necessary here.
*/
- early_platform_driver_register_all("earlytimer");
- early_platform_driver_probe("earlytimer", 2, 0);
+ sh_early_platform_driver_register_all("earlytimer");
+ sh_early_platform_driver_probe("earlytimer", 2, 0);
}
void __init time_init(void)
#endif
/* Device links support. */
+static LIST_HEAD(wait_for_suppliers);
+static DEFINE_MUTEX(wfs_lock);
+static LIST_HEAD(deferred_sync);
+static unsigned int defer_sync_state_count = 1;
#ifdef CONFIG_SRCU
static DEFINE_MUTEX(device_links_lock);
return ret;
list_for_each_entry(link, &dev->links.consumers, s_node) {
+ if (link->flags == (DL_FLAG_SYNC_STATE_ONLY | DL_FLAG_MANAGED))
+ continue;
+
if (link->consumer == target)
return 1;
device_pm_move_last(dev);
device_for_each_child(dev, NULL, device_reorder_to_tail);
- list_for_each_entry(link, &dev->links.consumers, s_node)
+ list_for_each_entry(link, &dev->links.consumers, s_node) {
+ if (link->flags == (DL_FLAG_SYNC_STATE_ONLY | DL_FLAG_MANAGED))
+ continue;
device_reorder_to_tail(link->consumer, NULL);
+ }
return 0;
}
#define DL_MANAGED_LINK_FLAGS (DL_FLAG_AUTOREMOVE_CONSUMER | \
DL_FLAG_AUTOREMOVE_SUPPLIER | \
- DL_FLAG_AUTOPROBE_CONSUMER)
+ DL_FLAG_AUTOPROBE_CONSUMER | \
+ DL_FLAG_SYNC_STATE_ONLY)
#define DL_ADD_VALID_FLAGS (DL_MANAGED_LINK_FLAGS | DL_FLAG_STATELESS | \
DL_FLAG_PM_RUNTIME | DL_FLAG_RPM_ACTIVE)
if (!consumer || !supplier || flags & ~DL_ADD_VALID_FLAGS ||
(flags & DL_FLAG_STATELESS && flags & DL_MANAGED_LINK_FLAGS) ||
+ (flags & DL_FLAG_SYNC_STATE_ONLY &&
+ flags != DL_FLAG_SYNC_STATE_ONLY) ||
(flags & DL_FLAG_AUTOPROBE_CONSUMER &&
flags & (DL_FLAG_AUTOREMOVE_CONSUMER |
DL_FLAG_AUTOREMOVE_SUPPLIER)))
/*
* If the supplier has not been fully registered yet or there is a
- * reverse dependency between the consumer and the supplier already in
- * the graph, return NULL.
+ * reverse (non-SYNC_STATE_ONLY) dependency between the consumer and
+ * the supplier already in the graph, return NULL. If the link is a
+ * SYNC_STATE_ONLY link, we don't check for reverse dependencies
+ * because it only affects sync_state() callbacks.
*/
if (!device_pm_initialized(supplier)
- || device_is_dependent(consumer, supplier)) {
+ || (!(flags & DL_FLAG_SYNC_STATE_ONLY) &&
+ device_is_dependent(consumer, supplier))) {
link = NULL;
goto out;
}
}
if (flags & DL_FLAG_STATELESS) {
- link->flags |= DL_FLAG_STATELESS;
kref_get(&link->kref);
- goto out;
+ if (link->flags & DL_FLAG_SYNC_STATE_ONLY &&
+ !(link->flags & DL_FLAG_STATELESS)) {
+ link->flags |= DL_FLAG_STATELESS;
+ goto reorder;
+ } else {
+ goto out;
+ }
}
/*
link->flags |= DL_FLAG_MANAGED;
device_link_init_status(link, consumer, supplier);
}
+ if (link->flags & DL_FLAG_SYNC_STATE_ONLY &&
+ !(flags & DL_FLAG_SYNC_STATE_ONLY)) {
+ link->flags &= ~DL_FLAG_SYNC_STATE_ONLY;
+ goto reorder;
+ }
+
goto out;
}
flags & DL_FLAG_PM_RUNTIME)
pm_runtime_resume(supplier);
+ if (flags & DL_FLAG_SYNC_STATE_ONLY) {
+ dev_dbg(consumer,
+ "Linked as a sync state only consumer to %s\n",
+ dev_name(supplier));
+ goto out;
+ }
+reorder:
/*
* Move the consumer and all of the devices depending on it to the end
* of dpm_list and the devices_kset list.
}
EXPORT_SYMBOL_GPL(device_link_add);
+/**
+ * device_link_wait_for_supplier - Add device to wait_for_suppliers list
+ * @consumer: Consumer device
+ *
+ * Marks the @consumer device as waiting for suppliers to become available by
+ * adding it to the wait_for_suppliers list. The consumer device will never be
+ * probed until it's removed from the wait_for_suppliers list.
+ *
+ * The caller is responsible for adding the links to the supplier devices once
+ * they are available and removing the @consumer device from the
+ * wait_for_suppliers list once links to all the suppliers have been created.
+ *
+ * This function is NOT meant to be called from the probe function of the
+ * consumer but rather from code that creates/adds the consumer device.
+ */
+static void device_link_wait_for_supplier(struct device *consumer,
+ bool need_for_probe)
+{
+ mutex_lock(&wfs_lock);
+ list_add_tail(&consumer->links.needs_suppliers, &wait_for_suppliers);
+ consumer->links.need_for_probe = need_for_probe;
+ mutex_unlock(&wfs_lock);
+}
+
+static void device_link_wait_for_mandatory_supplier(struct device *consumer)
+{
+ device_link_wait_for_supplier(consumer, true);
+}
+
+static void device_link_wait_for_optional_supplier(struct device *consumer)
+{
+ device_link_wait_for_supplier(consumer, false);
+}
+
+/**
+ * device_link_add_missing_supplier_links - Add links from consumer devices to
+ * supplier devices, leaving any
+ * consumer with inactive suppliers on
+ * the wait_for_suppliers list
+ *
+ * Loops through all consumers waiting on suppliers and tries to add all their
+ * supplier links. If that succeeds, the consumer device is removed from
+ * wait_for_suppliers list. Otherwise, they are left in the wait_for_suppliers
+ * list. Devices left on the wait_for_suppliers list will not be probed.
+ *
+ * The fwnode add_links callback is expected to return 0 if it has found and
+ * added all the supplier links for the consumer device. It should return an
+ * error if it isn't able to do so.
+ *
+ * The caller of device_link_wait_for_supplier() is expected to call this once
+ * it's aware of potential suppliers becoming available.
+ */
+static void device_link_add_missing_supplier_links(void)
+{
+ struct device *dev, *tmp;
+
+ mutex_lock(&wfs_lock);
+ list_for_each_entry_safe(dev, tmp, &wait_for_suppliers,
+ links.needs_suppliers)
+ if (!fwnode_call_int_op(dev->fwnode, add_links, dev))
+ list_del_init(&dev->links.needs_suppliers);
+ mutex_unlock(&wfs_lock);
+}
+
static void device_link_free(struct device_link *link)
{
while (refcount_dec_not_one(&link->rpm_active))
struct device_link *link;
int ret = 0;
+ /*
+ * Device waiting for supplier to become available is not allowed to
+ * probe.
+ */
+ mutex_lock(&wfs_lock);
+ if (!list_empty(&dev->links.needs_suppliers) &&
+ dev->links.need_for_probe) {
+ mutex_unlock(&wfs_lock);
+ return -EPROBE_DEFER;
+ }
+ mutex_unlock(&wfs_lock);
+
device_links_write_lock();
list_for_each_entry(link, &dev->links.suppliers, c_node) {
- if (!(link->flags & DL_FLAG_MANAGED))
+ if (!(link->flags & DL_FLAG_MANAGED) ||
+ link->flags & DL_FLAG_SYNC_STATE_ONLY)
continue;
if (link->status != DL_STATE_AVAILABLE) {
return ret;
}
+static void __device_links_supplier_sync_state(struct device *dev)
+{
+ struct device_link *link;
+
+ if (dev->state_synced)
+ return;
+
+ list_for_each_entry(link, &dev->links.consumers, s_node) {
+ if (!(link->flags & DL_FLAG_MANAGED))
+ continue;
+ if (link->status != DL_STATE_ACTIVE)
+ return;
+ }
+
+ if (dev->bus->sync_state)
+ dev->bus->sync_state(dev);
+ else if (dev->driver && dev->driver->sync_state)
+ dev->driver->sync_state(dev);
+
+ dev->state_synced = true;
+}
+
+void device_links_supplier_sync_state_pause(void)
+{
+ device_links_write_lock();
+ defer_sync_state_count++;
+ device_links_write_unlock();
+}
+
+void device_links_supplier_sync_state_resume(void)
+{
+ struct device *dev, *tmp;
+
+ device_links_write_lock();
+ if (!defer_sync_state_count) {
+ WARN(true, "Unmatched sync_state pause/resume!");
+ goto out;
+ }
+ defer_sync_state_count--;
+ if (defer_sync_state_count)
+ goto out;
+
+ list_for_each_entry_safe(dev, tmp, &deferred_sync, links.defer_sync) {
+ __device_links_supplier_sync_state(dev);
+ list_del_init(&dev->links.defer_sync);
+ }
+out:
+ device_links_write_unlock();
+}
+
+static int sync_state_resume_initcall(void)
+{
+ device_links_supplier_sync_state_resume();
+ return 0;
+}
+late_initcall(sync_state_resume_initcall);
+
+static void __device_links_supplier_defer_sync(struct device *sup)
+{
+ if (list_empty(&sup->links.defer_sync))
+ list_add_tail(&sup->links.defer_sync, &deferred_sync);
+}
+
/**
* device_links_driver_bound - Update device links after probing its driver.
* @dev: Device to update the links for.
{
struct device_link *link;
+ /*
+ * If a device probes successfully, it's expected to have created all
+ * the device links it needs to or make new device links as it needs
+ * them. So, it no longer needs to wait on any suppliers.
+ */
+ mutex_lock(&wfs_lock);
+ list_del_init(&dev->links.needs_suppliers);
+ mutex_unlock(&wfs_lock);
+
device_links_write_lock();
list_for_each_entry(link, &dev->links.consumers, s_node) {
WARN_ON(link->status != DL_STATE_CONSUMER_PROBE);
WRITE_ONCE(link->status, DL_STATE_ACTIVE);
+
+ if (defer_sync_state_count)
+ __device_links_supplier_defer_sync(link->supplier);
+ else
+ __device_links_supplier_sync_state(link->supplier);
}
dev->links.status = DL_DEV_DRIVER_BOUND;
WRITE_ONCE(link->status, DL_STATE_DORMANT);
}
+ list_del_init(&dev->links.defer_sync);
__device_links_no_driver(dev);
device_links_write_unlock();
list_for_each_entry(link, &dev->links.consumers, s_node) {
enum device_link_state status;
- if (!(link->flags & DL_FLAG_MANAGED))
+ if (!(link->flags & DL_FLAG_MANAGED) ||
+ link->flags & DL_FLAG_SYNC_STATE_ONLY)
continue;
status = link->status;
{
struct device_link *link, *ln;
+ mutex_lock(&wfs_lock);
+ list_del(&dev->links.needs_suppliers);
+ mutex_unlock(&wfs_lock);
+
/*
* Delete all of the remaining links from this device to any other
* devices (either consumers or suppliers).
#endif
INIT_LIST_HEAD(&dev->links.consumers);
INIT_LIST_HEAD(&dev->links.suppliers);
+ INIT_LIST_HEAD(&dev->links.needs_suppliers);
+ INIT_LIST_HEAD(&dev->links.defer_sync);
dev->links.status = DL_DEV_NO_DRIVER;
}
EXPORT_SYMBOL_GPL(device_initialize);
struct device *parent;
struct kobject *kobj;
struct class_interface *class_intf;
- int error = -EINVAL;
+ int error = -EINVAL, fw_ret;
struct kobject *glue_dir = NULL;
dev = get_device(dev);
BUS_NOTIFY_ADD_DEVICE, dev);
kobject_uevent(&dev->kobj, KOBJ_ADD);
+
+ if (dev->fwnode && !dev->fwnode->dev)
+ dev->fwnode->dev = dev;
+
+ /*
+ * Check if any of the other devices (consumers) have been waiting for
+ * this device (supplier) to be added so that they can create a device
+ * link to it.
+ *
+ * This needs to happen after device_pm_add() because device_link_add()
+ * requires the supplier be registered before it's called.
+ *
+ * But this also needs to happe before bus_probe_device() to make sure
+ * waiting consumers can link to it before the driver is bound to the
+ * device and the driver sync_state callback is called for this device.
+ */
+ device_link_add_missing_supplier_links();
+
+ if (fwnode_has_op(dev->fwnode, add_links)) {
+ fw_ret = fwnode_call_int_op(dev->fwnode, add_links, dev);
+ if (fw_ret == -ENODEV)
+ device_link_wait_for_mandatory_supplier(dev);
+ else if (fw_ret)
+ device_link_wait_for_optional_supplier(dev);
+ }
+
bus_probe_device(dev);
if (parent)
klist_add_tail(&dev->p->knode_parent,
kill_device(dev);
device_unlock(dev);
+ if (dev->fwnode && dev->fwnode->dev == dev)
+ dev->fwnode->dev = NULL;
+
/* Notify clients of device removal. This call must come
* before dpm_sysfs_remove().
*/
*
* Copyright (c) 2003 Manuel Estrada Sainz
*
- * Please see Documentation/firmware_class/ for more information.
+ * Please see Documentation/driver-api/firmware/ for more information.
*
*/
path);
continue;
}
+ dev_dbg(device, "Loading firmware from %s\n", path);
if (decompress) {
dev_dbg(device, "f/w decompressing %s\n",
fw_priv->fw_name);
}
EXPORT_SYMBOL_GPL(platform_get_resource);
+#ifdef CONFIG_HAS_IOMEM
/**
* devm_platform_ioremap_resource - call devm_ioremap_resource() for a platform
* device
* resource management
* @index: resource index
*/
-#ifdef CONFIG_HAS_IOMEM
void __iomem *devm_platform_ioremap_resource(struct platform_device *pdev,
unsigned int index)
{
return devm_ioremap_resource(&pdev->dev, res);
}
EXPORT_SYMBOL_GPL(devm_platform_ioremap_resource);
+
+/**
+ * devm_platform_ioremap_resource_wc - write-combined variant of
+ * devm_platform_ioremap_resource()
+ *
+ * @pdev: platform device to use both for memory resource lookup as well as
+ * resource management
+ * @index: resource index
+ */
+void __iomem *devm_platform_ioremap_resource_wc(struct platform_device *pdev,
+ unsigned int index)
+{
+ struct resource *res;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, index);
+ return devm_ioremap_resource_wc(&pdev->dev, res);
+}
+
+/**
+ * devm_platform_ioremap_resource_byname - call devm_ioremap_resource for
+ * a platform device, retrieve the
+ * resource by name
+ *
+ * @pdev: platform device to use both for memory resource lookup as well as
+ * resource management
+ * @name: name of the resource
+ */
+void __iomem *
+devm_platform_ioremap_resource_byname(struct platform_device *pdev,
+ const char *name)
+{
+ struct resource *res;
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, name);
+ return devm_ioremap_resource(&pdev->dev, res);
+}
+EXPORT_SYMBOL_GPL(devm_platform_ioremap_resource_byname);
#endif /* CONFIG_HAS_IOMEM */
-static int __platform_get_irq(struct platform_device *dev, unsigned int num)
+/**
+ * platform_get_irq_optional - get an optional IRQ for a device
+ * @dev: platform device
+ * @num: IRQ number index
+ *
+ * Gets an IRQ for a platform device. Device drivers should check the return
+ * value for errors so as to not pass a negative integer value to the
+ * request_irq() APIs. This is the same as platform_get_irq(), except that it
+ * does not print an error message if an IRQ can not be obtained.
+ *
+ * Example:
+ * int irq = platform_get_irq_optional(pdev, 0);
+ * if (irq < 0)
+ * return irq;
+ *
+ * Return: IRQ number on success, negative error number on failure.
+ */
+int platform_get_irq_optional(struct platform_device *dev, unsigned int num)
{
#ifdef CONFIG_SPARC
/* sparc does not have irqs represented as IORESOURCE_IRQ resources */
return -ENXIO;
#endif
}
+EXPORT_SYMBOL_GPL(platform_get_irq_optional);
/**
* platform_get_irq - get an IRQ for a device
{
int ret;
- ret = __platform_get_irq(dev, num);
+ ret = platform_get_irq_optional(dev, num);
if (ret < 0 && ret != -EPROBE_DEFER)
dev_err(&dev->dev, "IRQ index %u not found\n", num);
}
EXPORT_SYMBOL_GPL(platform_get_irq);
-/**
- * platform_get_irq_optional - get an optional IRQ for a device
- * @dev: platform device
- * @num: IRQ number index
- *
- * Gets an IRQ for a platform device. Device drivers should check the return
- * value for errors so as to not pass a negative integer value to the
- * request_irq() APIs. This is the same as platform_get_irq(), except that it
- * does not print an error message if an IRQ can not be obtained.
- *
- * Example:
- * int irq = platform_get_irq_optional(pdev, 0);
- * if (irq < 0)
- * return irq;
- *
- * Return: IRQ number on success, negative error number on failure.
- */
-int platform_get_irq_optional(struct platform_device *dev, unsigned int num)
-{
- return __platform_get_irq(dev, num);
-}
-EXPORT_SYMBOL_GPL(platform_get_irq_optional);
-
/**
* platform_irq_count - Count the number of IRQs a platform device uses
* @dev: platform device
{
int ret, nr = 0;
- while ((ret = __platform_get_irq(dev, nr)) >= 0)
+ while ((ret = platform_get_irq_optional(dev, nr)) >= 0)
nr++;
if (ret == -EPROBE_DEFER)
{
int error;
- early_platform_cleanup();
-
error = device_register(&platform_bus);
if (error) {
put_device(&platform_bus);
of_platform_register_reconfig_notifier();
return error;
}
-
-static __initdata LIST_HEAD(early_platform_driver_list);
-static __initdata LIST_HEAD(early_platform_device_list);
-
-/**
- * early_platform_driver_register - register early platform driver
- * @epdrv: early_platform driver structure
- * @buf: string passed from early_param()
- *
- * Helper function for early_platform_init() / early_platform_init_buffer()
- */
-int __init early_platform_driver_register(struct early_platform_driver *epdrv,
- char *buf)
-{
- char *tmp;
- int n;
-
- /* Simply add the driver to the end of the global list.
- * Drivers will by default be put on the list in compiled-in order.
- */
- if (!epdrv->list.next) {
- INIT_LIST_HEAD(&epdrv->list);
- list_add_tail(&epdrv->list, &early_platform_driver_list);
- }
-
- /* If the user has specified device then make sure the driver
- * gets prioritized. The driver of the last device specified on
- * command line will be put first on the list.
- */
- n = strlen(epdrv->pdrv->driver.name);
- if (buf && !strncmp(buf, epdrv->pdrv->driver.name, n)) {
- list_move(&epdrv->list, &early_platform_driver_list);
-
- /* Allow passing parameters after device name */
- if (buf[n] == '\0' || buf[n] == ',')
- epdrv->requested_id = -1;
- else {
- epdrv->requested_id = simple_strtoul(&buf[n + 1],
- &tmp, 10);
-
- if (buf[n] != '.' || (tmp == &buf[n + 1])) {
- epdrv->requested_id = EARLY_PLATFORM_ID_ERROR;
- n = 0;
- } else
- n += strcspn(&buf[n + 1], ",") + 1;
- }
-
- if (buf[n] == ',')
- n++;
-
- if (epdrv->bufsize) {
- memcpy(epdrv->buffer, &buf[n],
- min_t(int, epdrv->bufsize, strlen(&buf[n]) + 1));
- epdrv->buffer[epdrv->bufsize - 1] = '\0';
- }
- }
-
- return 0;
-}
-
-/**
- * early_platform_add_devices - adds a number of early platform devices
- * @devs: array of early platform devices to add
- * @num: number of early platform devices in array
- *
- * Used by early architecture code to register early platform devices and
- * their platform data.
- */
-void __init early_platform_add_devices(struct platform_device **devs, int num)
-{
- struct device *dev;
- int i;
-
- /* simply add the devices to list */
- for (i = 0; i < num; i++) {
- dev = &devs[i]->dev;
-
- if (!dev->devres_head.next) {
- pm_runtime_early_init(dev);
- INIT_LIST_HEAD(&dev->devres_head);
- list_add_tail(&dev->devres_head,
- &early_platform_device_list);
- }
- }
-}
-
-/**
- * early_platform_driver_register_all - register early platform drivers
- * @class_str: string to identify early platform driver class
- *
- * Used by architecture code to register all early platform drivers
- * for a certain class. If omitted then only early platform drivers
- * with matching kernel command line class parameters will be registered.
- */
-void __init early_platform_driver_register_all(char *class_str)
-{
- /* The "class_str" parameter may or may not be present on the kernel
- * command line. If it is present then there may be more than one
- * matching parameter.
- *
- * Since we register our early platform drivers using early_param()
- * we need to make sure that they also get registered in the case
- * when the parameter is missing from the kernel command line.
- *
- * We use parse_early_options() to make sure the early_param() gets
- * called at least once. The early_param() may be called more than
- * once since the name of the preferred device may be specified on
- * the kernel command line. early_platform_driver_register() handles
- * this case for us.
- */
- parse_early_options(class_str);
-}
-
-/**
- * early_platform_match - find early platform device matching driver
- * @epdrv: early platform driver structure
- * @id: id to match against
- */
-static struct platform_device * __init
-early_platform_match(struct early_platform_driver *epdrv, int id)
-{
- struct platform_device *pd;
-
- list_for_each_entry(pd, &early_platform_device_list, dev.devres_head)
- if (platform_match(&pd->dev, &epdrv->pdrv->driver))
- if (pd->id == id)
- return pd;
-
- return NULL;
-}
-
-/**
- * early_platform_left - check if early platform driver has matching devices
- * @epdrv: early platform driver structure
- * @id: return true if id or above exists
- */
-static int __init early_platform_left(struct early_platform_driver *epdrv,
- int id)
-{
- struct platform_device *pd;
-
- list_for_each_entry(pd, &early_platform_device_list, dev.devres_head)
- if (platform_match(&pd->dev, &epdrv->pdrv->driver))
- if (pd->id >= id)
- return 1;
-
- return 0;
-}
-
-/**
- * early_platform_driver_probe_id - probe drivers matching class_str and id
- * @class_str: string to identify early platform driver class
- * @id: id to match against
- * @nr_probe: number of platform devices to successfully probe before exiting
- */
-static int __init early_platform_driver_probe_id(char *class_str,
- int id,
- int nr_probe)
-{
- struct early_platform_driver *epdrv;
- struct platform_device *match;
- int match_id;
- int n = 0;
- int left = 0;
-
- list_for_each_entry(epdrv, &early_platform_driver_list, list) {
- /* only use drivers matching our class_str */
- if (strcmp(class_str, epdrv->class_str))
- continue;
-
- if (id == -2) {
- match_id = epdrv->requested_id;
- left = 1;
-
- } else {
- match_id = id;
- left += early_platform_left(epdrv, id);
-
- /* skip requested id */
- switch (epdrv->requested_id) {
- case EARLY_PLATFORM_ID_ERROR:
- case EARLY_PLATFORM_ID_UNSET:
- break;
- default:
- if (epdrv->requested_id == id)
- match_id = EARLY_PLATFORM_ID_UNSET;
- }
- }
-
- switch (match_id) {
- case EARLY_PLATFORM_ID_ERROR:
- pr_warn("%s: unable to parse %s parameter\n",
- class_str, epdrv->pdrv->driver.name);
- /* fall-through */
- case EARLY_PLATFORM_ID_UNSET:
- match = NULL;
- break;
- default:
- match = early_platform_match(epdrv, match_id);
- }
-
- if (match) {
- /*
- * Set up a sensible init_name to enable
- * dev_name() and others to be used before the
- * rest of the driver core is initialized.
- */
- if (!match->dev.init_name && slab_is_available()) {
- if (match->id != -1)
- match->dev.init_name =
- kasprintf(GFP_KERNEL, "%s.%d",
- match->name,
- match->id);
- else
- match->dev.init_name =
- kasprintf(GFP_KERNEL, "%s",
- match->name);
-
- if (!match->dev.init_name)
- return -ENOMEM;
- }
-
- if (epdrv->pdrv->probe(match))
- pr_warn("%s: unable to probe %s early.\n",
- class_str, match->name);
- else
- n++;
- }
-
- if (n >= nr_probe)
- break;
- }
-
- if (left)
- return n;
- else
- return -ENODEV;
-}
-
-/**
- * early_platform_driver_probe - probe a class of registered drivers
- * @class_str: string to identify early platform driver class
- * @nr_probe: number of platform devices to successfully probe before exiting
- * @user_only: only probe user specified early platform devices
- *
- * Used by architecture code to probe registered early platform drivers
- * within a certain class. For probe to happen a registered early platform
- * device matching a registered early platform driver is needed.
- */
-int __init early_platform_driver_probe(char *class_str,
- int nr_probe,
- int user_only)
-{
- int k, n, i;
-
- n = 0;
- for (i = -2; n < nr_probe; i++) {
- k = early_platform_driver_probe_id(class_str, i, nr_probe - n);
-
- if (k < 0)
- break;
-
- n += k;
-
- if (user_only)
- break;
- }
-
- return n;
-}
-
-/**
- * early_platform_cleanup - clean up early platform code
- */
-void __init early_platform_cleanup(void)
-{
- struct platform_device *pd, *pd2;
-
- /* clean up the devres list used to chain devices */
- list_for_each_entry_safe(pd, pd2, &early_platform_device_list,
- dev.devres_head) {
- list_del(&pd->dev.devres_head);
- memset(&pd->dev.devres_head, 0, sizeof(pd->dev.devres_head));
- }
-}
-
.is_visible = soc_attribute_mode,
};
-static const struct attribute_group *soc_attr_groups[] = {
- &soc_attr_group,
- NULL,
-};
-
static void soc_release(struct device *dev)
{
struct soc_device *soc_dev = container_of(dev, struct soc_device, dev);
+ ida_simple_remove(&soc_ida, soc_dev->soc_dev_num);
+ kfree(soc_dev->dev.groups);
kfree(soc_dev);
}
struct soc_device *soc_device_register(struct soc_device_attribute *soc_dev_attr)
{
struct soc_device *soc_dev;
+ const struct attribute_group **soc_attr_groups;
int ret;
if (!soc_bus_type.p) {
goto out1;
}
+ soc_attr_groups = kcalloc(3, sizeof(*soc_attr_groups), GFP_KERNEL);
+ if (!soc_attr_groups) {
+ ret = -ENOMEM;
+ goto out2;
+ }
+ soc_attr_groups[0] = &soc_attr_group;
+ soc_attr_groups[1] = soc_dev_attr->custom_attr_group;
+
/* Fetch a unique (reclaimable) SOC ID. */
ret = ida_simple_get(&soc_ida, 0, 0, GFP_KERNEL);
if (ret < 0)
- goto out2;
+ goto out3;
soc_dev->soc_dev_num = ret;
soc_dev->attr = soc_dev_attr;
dev_set_name(&soc_dev->dev, "soc%d", soc_dev->soc_dev_num);
ret = device_register(&soc_dev->dev);
- if (ret)
- goto out3;
+ if (ret) {
+ put_device(&soc_dev->dev);
+ return ERR_PTR(ret);
+ }
return soc_dev;
out3:
- ida_simple_remove(&soc_ida, soc_dev->soc_dev_num);
- put_device(&soc_dev->dev);
- soc_dev = NULL;
+ kfree(soc_attr_groups);
out2:
kfree(soc_dev);
out1:
/* Ensure soc_dev->attr is freed prior to calling soc_device_unregister. */
void soc_device_unregister(struct soc_device *soc_dev)
{
- ida_simple_remove(&soc_ida, soc_dev->soc_dev_num);
-
device_unregister(&soc_dev->dev);
early_soc_dev_attr = NULL;
}
#include <linux/slab.h>
#include <linux/spinlock.h>
+#ifdef CONFIG_SUPERH
+#include <asm/platform_early.h>
+#endif
+
struct sh_cmt_device;
/*
struct sh_cmt_device *cmt = platform_get_drvdata(pdev);
int ret;
- if (!is_early_platform_device(pdev)) {
+ if (!is_sh_early_platform_device(pdev)) {
pm_runtime_set_active(&pdev->dev);
pm_runtime_enable(&pdev->dev);
}
pm_runtime_idle(&pdev->dev);
return ret;
}
- if (is_early_platform_device(pdev))
+ if (is_sh_early_platform_device(pdev))
return 0;
out:
platform_driver_unregister(&sh_cmt_device_driver);
}
-early_platform_init("earlytimer", &sh_cmt_device_driver);
+#ifdef CONFIG_SUPERH
+sh_early_platform_init("earlytimer", &sh_cmt_device_driver);
+#endif
+
subsys_initcall(sh_cmt_init);
module_exit(sh_cmt_exit);
#include <linux/slab.h>
#include <linux/spinlock.h>
+#ifdef CONFIG_SUPERH
+#include <asm/platform_early.h>
+#endif
+
struct sh_mtu2_device;
struct sh_mtu2_channel {
struct sh_mtu2_device *mtu = platform_get_drvdata(pdev);
int ret;
- if (!is_early_platform_device(pdev)) {
+ if (!is_sh_early_platform_device(pdev)) {
pm_runtime_set_active(&pdev->dev);
pm_runtime_enable(&pdev->dev);
}
pm_runtime_idle(&pdev->dev);
return ret;
}
- if (is_early_platform_device(pdev))
+ if (is_sh_early_platform_device(pdev))
return 0;
out:
platform_driver_unregister(&sh_mtu2_device_driver);
}
-early_platform_init("earlytimer", &sh_mtu2_device_driver);
+#ifdef CONFIG_SUPERH
+sh_early_platform_init("earlytimer", &sh_mtu2_device_driver);
+#endif
+
subsys_initcall(sh_mtu2_init);
module_exit(sh_mtu2_exit);
#include <linux/slab.h>
#include <linux/spinlock.h>
+#ifdef CONFIG_SUPERH
+#include <asm/platform_early.h>
+#endif
+
enum sh_tmu_model {
SH_TMU,
SH_TMU_SH3,
struct sh_tmu_device *tmu = platform_get_drvdata(pdev);
int ret;
- if (!is_early_platform_device(pdev)) {
+ if (!is_sh_early_platform_device(pdev)) {
pm_runtime_set_active(&pdev->dev);
pm_runtime_enable(&pdev->dev);
}
pm_runtime_idle(&pdev->dev);
return ret;
}
- if (is_early_platform_device(pdev))
+
+ if (is_sh_early_platform_device(pdev))
return 0;
out:
platform_driver_unregister(&sh_tmu_device_driver);
}
-early_platform_init("earlytimer", &sh_tmu_device_driver);
+#ifdef CONFIG_SUPERH
+sh_early_platform_init("earlytimer", &sh_tmu_device_driver);
+#endif
+
subsys_initcall(sh_tmu_init);
module_exit(sh_tmu_exit);
MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
MODULE_DESCRIPTION("BD70528 voltage regulator driver");
MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:bd70528-gpio");
static int em_gio_probe(struct platform_device *pdev)
{
struct em_gio_priv *p;
- struct resource *irq[2];
struct gpio_chip *gpio_chip;
struct irq_chip *irq_chip;
struct device *dev = &pdev->dev;
const char *name = dev_name(dev);
unsigned int ngpios;
- int ret;
+ int irq[2], ret;
p = devm_kzalloc(dev, sizeof(*p), GFP_KERNEL);
if (!p)
platform_set_drvdata(pdev, p);
spin_lock_init(&p->sense_lock);
- irq[0] = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
- irq[1] = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
+ irq[0] = platform_get_irq(pdev, 0);
+ if (irq[0] < 0)
+ return irq[0];
- if (!irq[0] || !irq[1]) {
- dev_err(dev, "missing IRQ or IOMEM\n");
- return -EINVAL;
- }
+ irq[1] = platform_get_irq(pdev, 1);
+ if (irq[1] < 0)
+ return irq[1];
p->base0 = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(p->base0))
gpio_chip->ngpio = ngpios;
irq_chip = &p->irq_chip;
- irq_chip->name = name;
+ irq_chip->name = "gpio-em";
irq_chip->irq_mask = em_gio_irq_disable;
irq_chip->irq_unmask = em_gio_irq_enable;
irq_chip->irq_set_type = em_gio_irq_set_type;
if (ret)
return ret;
- if (devm_request_irq(dev, irq[0]->start,
- em_gio_irq_handler, 0, name, p)) {
+ if (devm_request_irq(dev, irq[0], em_gio_irq_handler, 0, name, p)) {
dev_err(dev, "failed to request low IRQ\n");
return -ENOENT;
}
- if (devm_request_irq(dev, irq[1]->start,
- em_gio_irq_handler, 0, name, p)) {
+ if (devm_request_irq(dev, irq[1], em_gio_irq_handler, 0, name, p)) {
dev_err(dev, "failed to request high IRQ\n");
return -ENOENT;
}
if (!(gc->read_reg(gc->reg_dir_in) & bgpio_line2mask(gc, gpio)))
return GPIO_LINE_DIRECTION_OUT;
- /* This should not happen */
return GPIO_LINE_DIRECTION_IN;
}
mutex_unlock(&chip->lock);
}
+static int gpio_mockup_apply_pull(struct gpio_mockup_chip *chip,
+ unsigned int offset, int value)
+{
+ struct gpio_desc *desc;
+ struct gpio_chip *gc;
+ struct irq_sim *sim;
+ int curr, irq, irq_type;
+
+ gc = &chip->gc;
+ desc = &gc->gpiodev->descs[offset];
+ sim = &chip->irqsim;
+
+ mutex_lock(&chip->lock);
+
+ if (test_bit(FLAG_REQUESTED, &desc->flags) &&
+ !test_bit(FLAG_IS_OUT, &desc->flags)) {
+ curr = __gpio_mockup_get(chip, offset);
+ if (curr == value)
+ goto out;
+
+ irq = irq_sim_irqnum(sim, offset);
+ irq_type = irq_get_trigger_type(irq);
+
+ if ((value == 1 && (irq_type & IRQ_TYPE_EDGE_RISING)) ||
+ (value == 0 && (irq_type & IRQ_TYPE_EDGE_FALLING)))
+ irq_sim_fire(sim, offset);
+ }
+
+ /* Change the value unless we're actively driving the line. */
+ if (!test_bit(FLAG_REQUESTED, &desc->flags) ||
+ !test_bit(FLAG_IS_OUT, &desc->flags))
+ __gpio_mockup_set(chip, offset, value);
+
+out:
+ chip->lines[offset].pull = value;
+ mutex_unlock(&chip->lock);
+ return 0;
+}
+
+static int gpio_mockup_set_config(struct gpio_chip *gc,
+ unsigned int offset, unsigned long config)
+{
+ struct gpio_mockup_chip *chip = gpiochip_get_data(gc);
+
+ switch (pinconf_to_config_param(config)) {
+ case PIN_CONFIG_BIAS_PULL_UP:
+ return gpio_mockup_apply_pull(chip, offset, 1);
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ return gpio_mockup_apply_pull(chip, offset, 0);
+ default:
+ break;
+ }
+ return -ENOTSUPP;
+}
+
static int gpio_mockup_dirout(struct gpio_chip *gc,
unsigned int offset, int value)
{
size_t size, loff_t *ppos)
{
struct gpio_mockup_dbgfs_private *priv;
- int rv, val, curr, irq, irq_type;
- struct gpio_mockup_chip *chip;
+ int rv, val;
struct seq_file *sfile;
- struct gpio_desc *desc;
- struct gpio_chip *gc;
- struct irq_sim *sim;
if (*ppos != 0)
return -EINVAL;
sfile = file->private_data;
priv = sfile->private;
- chip = priv->chip;
- gc = &chip->gc;
- desc = &gc->gpiodev->descs[priv->offset];
- sim = &chip->irqsim;
-
- mutex_lock(&chip->lock);
-
- if (test_bit(FLAG_REQUESTED, &desc->flags) &&
- !test_bit(FLAG_IS_OUT, &desc->flags)) {
- curr = __gpio_mockup_get(chip, priv->offset);
- if (curr == val)
- goto out;
-
- irq = irq_sim_irqnum(sim, priv->offset);
- irq_type = irq_get_trigger_type(irq);
-
- if ((val == 1 && (irq_type & IRQ_TYPE_EDGE_RISING)) ||
- (val == 0 && (irq_type & IRQ_TYPE_EDGE_FALLING)))
- irq_sim_fire(sim, priv->offset);
- }
-
- /* Change the value unless we're actively driving the line. */
- if (!test_bit(FLAG_REQUESTED, &desc->flags) ||
- !test_bit(FLAG_IS_OUT, &desc->flags))
- __gpio_mockup_set(chip, priv->offset, val);
-
-out:
- chip->lines[priv->offset].pull = val;
- mutex_unlock(&chip->lock);
+ rv = gpio_mockup_apply_pull(priv->chip, priv->offset, val);
+ if (rv)
+ return rv;
return size;
}
gc->direction_output = gpio_mockup_dirout;
gc->direction_input = gpio_mockup_dirin;
gc->get_direction = gpio_mockup_get_direction;
+ gc->set_config = gpio_mockup_set_config;
gc->to_irq = gpio_mockup_to_irq;
gc->free = gpio_mockup_free;
{
struct device *dev = &pdev->dev;
struct mvebu_pwm *mvpwm;
- struct resource *res;
u32 set;
if (!of_device_is_compatible(mvchip->chip.of_node,
"marvell,armada-370-gpio"))
return 0;
- /*
- * There are only two sets of PWM configuration registers for
- * all the GPIO lines on those SoCs which this driver reserves
- * for the first two GPIO chips. So if the resource is missing
- * we can't treat it as an error.
- */
- res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pwm");
- if (!res)
- return 0;
-
if (IS_ERR(mvchip->clk))
return PTR_ERR(mvchip->clk);
mvchip->mvpwm = mvpwm;
mvpwm->mvchip = mvchip;
- mvpwm->membase = devm_ioremap_resource(dev, res);
+ /*
+ * There are only two sets of PWM configuration registers for
+ * all the GPIO lines on those SoCs which this driver reserves
+ * for the first two GPIO chips. So if the resource is missing
+ * we can't treat it as an error.
+ */
+ mvpwm->membase = devm_platform_ioremap_resource_byname(pdev, "pwm");
if (IS_ERR(mvpwm->membase))
return PTR_ERR(mvpwm->membase);
gpio_chip->ngpio = npins;
irq_chip = &p->irq_chip;
- irq_chip->name = name;
+ irq_chip->name = "gpio-rcar";
irq_chip->parent_device = dev;
irq_chip->irq_mask = gpio_rcar_irq_disable;
irq_chip->irq_unmask = gpio_rcar_irq_enable;
#include <dt-bindings/gpio/tegra186-gpio.h>
#include <dt-bindings/gpio/tegra194-gpio.h>
+/* security registers */
+#define TEGRA186_GPIO_CTL_SCR 0x0c
+#define TEGRA186_GPIO_CTL_SCR_SEC_WEN BIT(28)
+#define TEGRA186_GPIO_CTL_SCR_SEC_REN BIT(27)
+
+#define TEGRA186_GPIO_INT_ROUTE_MAPPING(p, x) (0x14 + (p) * 0x20 + (x) * 4)
+
+/* control registers */
#define TEGRA186_GPIO_ENABLE_CONFIG 0x00
#define TEGRA186_GPIO_ENABLE_CONFIG_ENABLE BIT(0)
#define TEGRA186_GPIO_ENABLE_CONFIG_OUT BIT(1)
#define TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_DOUBLE_EDGE (0x3 << 2)
#define TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_TYPE_MASK (0x3 << 2)
#define TEGRA186_GPIO_ENABLE_CONFIG_TRIGGER_LEVEL BIT(4)
+#define TEGRA186_GPIO_ENABLE_CONFIG_DEBOUNCE BIT(5)
#define TEGRA186_GPIO_ENABLE_CONFIG_INTERRUPT BIT(6)
#define TEGRA186_GPIO_DEBOUNCE_CONTROL 0x04
struct tegra_gpio_port {
const char *name;
- unsigned int offset;
+ unsigned int bank;
+ unsigned int port;
unsigned int pins;
- unsigned int irq;
};
struct tegra_gpio_soc {
const struct tegra_gpio_soc *soc;
+ void __iomem *secure;
void __iomem *base;
};
unsigned int pin)
{
const struct tegra_gpio_port *port;
+ unsigned int offset;
port = tegra186_gpio_get_port(gpio, &pin);
if (!port)
return NULL;
- return gpio->base + port->offset + pin * 0x20;
+ offset = port->bank * 0x1000 + port->port * 0x200;
+
+ return gpio->base + offset + pin * 0x20;
}
static int tegra186_gpio_get_direction(struct gpio_chip *chip,
writel(value, base + TEGRA186_GPIO_OUTPUT_VALUE);
}
+static int tegra186_gpio_set_config(struct gpio_chip *chip,
+ unsigned int offset,
+ unsigned long config)
+{
+ struct tegra_gpio *gpio = gpiochip_get_data(chip);
+ u32 debounce, value;
+ void __iomem *base;
+
+ base = tegra186_gpio_get_base(gpio, offset);
+ if (base == NULL)
+ return -ENXIO;
+
+ if (pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE)
+ return -ENOTSUPP;
+
+ debounce = pinconf_to_config_argument(config);
+
+ /*
+ * The Tegra186 GPIO controller supports a maximum of 255 ms debounce
+ * time.
+ */
+ if (debounce > 255000)
+ return -EINVAL;
+
+ debounce = DIV_ROUND_UP(debounce, USEC_PER_MSEC);
+
+ value = TEGRA186_GPIO_DEBOUNCE_CONTROL_THRESHOLD(debounce);
+ writel(value, base + TEGRA186_GPIO_DEBOUNCE_CONTROL);
+
+ value = readl(base + TEGRA186_GPIO_ENABLE_CONFIG);
+ value |= TEGRA186_GPIO_ENABLE_CONFIG_DEBOUNCE;
+ writel(value, base + TEGRA186_GPIO_ENABLE_CONFIG);
+
+ return 0;
+}
+
static int tegra186_gpio_of_xlate(struct gpio_chip *chip,
const struct of_phandle_args *spec,
u32 *flags)
for (i = 0; i < gpio->soc->num_ports; i++) {
const struct tegra_gpio_port *port = &gpio->soc->ports[i];
- void __iomem *base = gpio->base + port->offset;
unsigned int pin, irq;
unsigned long value;
+ void __iomem *base;
- /* skip ports that are not associated with this controller */
- if (parent != gpio->irq[port->irq])
+ base = gpio->base + port->bank * 0x1000 + port->port * 0x200;
+
+ /* skip ports that are not associated with this bank */
+ if (parent != gpio->irq[port->bank])
goto skip;
value = readl(base + TEGRA186_GPIO_INTERRUPT_STATUS(1));
{ /* sentinel */ }
};
+static void tegra186_gpio_init_route_mapping(struct tegra_gpio *gpio)
+{
+ unsigned int i, j;
+ u32 value;
+
+ for (i = 0; i < gpio->soc->num_ports; i++) {
+ const struct tegra_gpio_port *port = &gpio->soc->ports[i];
+ unsigned int offset, p = port->port;
+ void __iomem *base;
+
+ base = gpio->secure + port->bank * 0x1000 + 0x800;
+
+ value = readl(base + TEGRA186_GPIO_CTL_SCR);
+
+ /*
+ * For controllers that haven't been locked down yet, make
+ * sure to program the default interrupt route mapping.
+ */
+ if ((value & TEGRA186_GPIO_CTL_SCR_SEC_REN) == 0 &&
+ (value & TEGRA186_GPIO_CTL_SCR_SEC_WEN) == 0) {
+ for (j = 0; j < 8; j++) {
+ offset = TEGRA186_GPIO_INT_ROUTE_MAPPING(p, j);
+
+ value = readl(base + offset);
+ value = BIT(port->pins) - 1;
+ writel(value, base + offset);
+ }
+ }
+ }
+}
+
static int tegra186_gpio_probe(struct platform_device *pdev)
{
unsigned int i, j, offset;
struct gpio_irq_chip *irq;
struct tegra_gpio *gpio;
struct device_node *np;
- struct resource *res;
char **names;
int err;
gpio->soc = of_device_get_match_data(&pdev->dev);
- res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "gpio");
- gpio->base = devm_ioremap_resource(&pdev->dev, res);
+ gpio->secure = devm_platform_ioremap_resource_byname(pdev, "security");
+ if (IS_ERR(gpio->secure))
+ return PTR_ERR(gpio->secure);
+
+ gpio->base = devm_platform_ioremap_resource_byname(pdev, "gpio");
if (IS_ERR(gpio->base))
return PTR_ERR(gpio->base);
gpio->gpio.direction_output = tegra186_gpio_direction_output;
gpio->gpio.get = tegra186_gpio_get,
gpio->gpio.set = tegra186_gpio_set;
+ gpio->gpio.set_config = tegra186_gpio_set_config;
gpio->gpio.base = -1;
return -EPROBE_DEFER;
}
+ tegra186_gpio_init_route_mapping(gpio);
+
irq->map = devm_kcalloc(&pdev->dev, gpio->gpio.ngpio,
sizeof(*irq->map), GFP_KERNEL);
if (!irq->map)
const struct tegra_gpio_port *port = &gpio->soc->ports[i];
for (j = 0; j < port->pins; j++)
- irq->map[offset + j] = irq->parents[port->irq];
+ irq->map[offset + j] = irq->parents[port->bank];
offset += port->pins;
}
return 0;
}
-#define TEGRA186_MAIN_GPIO_PORT(port, base, count, controller) \
- [TEGRA186_MAIN_GPIO_PORT_##port] = { \
- .name = #port, \
- .offset = base, \
- .pins = count, \
- .irq = controller, \
+#define TEGRA186_MAIN_GPIO_PORT(_name, _bank, _port, _pins) \
+ [TEGRA186_MAIN_GPIO_PORT_##_name] = { \
+ .name = #_name, \
+ .bank = _bank, \
+ .port = _port, \
+ .pins = _pins, \
}
static const struct tegra_gpio_port tegra186_main_ports[] = {
- TEGRA186_MAIN_GPIO_PORT( A, 0x2000, 7, 2),
- TEGRA186_MAIN_GPIO_PORT( B, 0x3000, 7, 3),
- TEGRA186_MAIN_GPIO_PORT( C, 0x3200, 7, 3),
- TEGRA186_MAIN_GPIO_PORT( D, 0x3400, 6, 3),
- TEGRA186_MAIN_GPIO_PORT( E, 0x2200, 8, 2),
- TEGRA186_MAIN_GPIO_PORT( F, 0x2400, 6, 2),
- TEGRA186_MAIN_GPIO_PORT( G, 0x4200, 6, 4),
- TEGRA186_MAIN_GPIO_PORT( H, 0x1000, 7, 1),
- TEGRA186_MAIN_GPIO_PORT( I, 0x0800, 8, 0),
- TEGRA186_MAIN_GPIO_PORT( J, 0x5000, 8, 5),
- TEGRA186_MAIN_GPIO_PORT( K, 0x5200, 1, 5),
- TEGRA186_MAIN_GPIO_PORT( L, 0x1200, 8, 1),
- TEGRA186_MAIN_GPIO_PORT( M, 0x5600, 6, 5),
- TEGRA186_MAIN_GPIO_PORT( N, 0x0000, 7, 0),
- TEGRA186_MAIN_GPIO_PORT( O, 0x0200, 4, 0),
- TEGRA186_MAIN_GPIO_PORT( P, 0x4000, 7, 4),
- TEGRA186_MAIN_GPIO_PORT( Q, 0x0400, 6, 0),
- TEGRA186_MAIN_GPIO_PORT( R, 0x0a00, 6, 0),
- TEGRA186_MAIN_GPIO_PORT( T, 0x0600, 4, 0),
- TEGRA186_MAIN_GPIO_PORT( X, 0x1400, 8, 1),
- TEGRA186_MAIN_GPIO_PORT( Y, 0x1600, 7, 1),
- TEGRA186_MAIN_GPIO_PORT(BB, 0x2600, 2, 2),
- TEGRA186_MAIN_GPIO_PORT(CC, 0x5400, 4, 5),
+ TEGRA186_MAIN_GPIO_PORT( A, 2, 0, 7),
+ TEGRA186_MAIN_GPIO_PORT( B, 3, 0, 7),
+ TEGRA186_MAIN_GPIO_PORT( C, 3, 1, 7),
+ TEGRA186_MAIN_GPIO_PORT( D, 3, 2, 6),
+ TEGRA186_MAIN_GPIO_PORT( E, 2, 1, 8),
+ TEGRA186_MAIN_GPIO_PORT( F, 2, 2, 6),
+ TEGRA186_MAIN_GPIO_PORT( G, 4, 1, 6),
+ TEGRA186_MAIN_GPIO_PORT( H, 1, 0, 7),
+ TEGRA186_MAIN_GPIO_PORT( I, 0, 4, 8),
+ TEGRA186_MAIN_GPIO_PORT( J, 5, 0, 8),
+ TEGRA186_MAIN_GPIO_PORT( K, 5, 1, 1),
+ TEGRA186_MAIN_GPIO_PORT( L, 1, 1, 8),
+ TEGRA186_MAIN_GPIO_PORT( M, 5, 3, 6),
+ TEGRA186_MAIN_GPIO_PORT( N, 0, 0, 7),
+ TEGRA186_MAIN_GPIO_PORT( O, 0, 1, 4),
+ TEGRA186_MAIN_GPIO_PORT( P, 4, 0, 7),
+ TEGRA186_MAIN_GPIO_PORT( Q, 0, 2, 6),
+ TEGRA186_MAIN_GPIO_PORT( R, 0, 5, 6),
+ TEGRA186_MAIN_GPIO_PORT( T, 0, 3, 4),
+ TEGRA186_MAIN_GPIO_PORT( X, 1, 2, 8),
+ TEGRA186_MAIN_GPIO_PORT( Y, 1, 3, 7),
+ TEGRA186_MAIN_GPIO_PORT(BB, 2, 3, 2),
+ TEGRA186_MAIN_GPIO_PORT(CC, 5, 2, 4),
};
static const struct tegra_gpio_soc tegra186_main_soc = {
.instance = 0,
};
-#define TEGRA186_AON_GPIO_PORT(port, base, count, controller) \
- [TEGRA186_AON_GPIO_PORT_##port] = { \
- .name = #port, \
- .offset = base, \
- .pins = count, \
- .irq = controller, \
+#define TEGRA186_AON_GPIO_PORT(_name, _bank, _port, _pins) \
+ [TEGRA186_AON_GPIO_PORT_##_name] = { \
+ .name = #_name, \
+ .bank = _bank, \
+ .port = _port, \
+ .pins = _pins, \
}
static const struct tegra_gpio_port tegra186_aon_ports[] = {
- TEGRA186_AON_GPIO_PORT( S, 0x0200, 5, 0),
- TEGRA186_AON_GPIO_PORT( U, 0x0400, 6, 0),
- TEGRA186_AON_GPIO_PORT( V, 0x0800, 8, 0),
- TEGRA186_AON_GPIO_PORT( W, 0x0a00, 8, 0),
- TEGRA186_AON_GPIO_PORT( Z, 0x0e00, 4, 0),
- TEGRA186_AON_GPIO_PORT(AA, 0x0c00, 8, 0),
- TEGRA186_AON_GPIO_PORT(EE, 0x0600, 3, 0),
- TEGRA186_AON_GPIO_PORT(FF, 0x0000, 5, 0),
+ TEGRA186_AON_GPIO_PORT( S, 0, 1, 5),
+ TEGRA186_AON_GPIO_PORT( U, 0, 2, 6),
+ TEGRA186_AON_GPIO_PORT( V, 0, 4, 8),
+ TEGRA186_AON_GPIO_PORT( W, 0, 5, 8),
+ TEGRA186_AON_GPIO_PORT( Z, 0, 7, 4),
+ TEGRA186_AON_GPIO_PORT(AA, 0, 6, 8),
+ TEGRA186_AON_GPIO_PORT(EE, 0, 3, 3),
+ TEGRA186_AON_GPIO_PORT(FF, 0, 0, 5),
};
static const struct tegra_gpio_soc tegra186_aon_soc = {
.instance = 1,
};
-#define TEGRA194_MAIN_GPIO_PORT(port, base, count, controller) \
- [TEGRA194_MAIN_GPIO_PORT_##port] = { \
- .name = #port, \
- .offset = base, \
- .pins = count, \
- .irq = controller, \
+#define TEGRA194_MAIN_GPIO_PORT(_name, _bank, _port, _pins) \
+ [TEGRA194_MAIN_GPIO_PORT_##_name] = { \
+ .name = #_name, \
+ .bank = _bank, \
+ .port = _port, \
+ .pins = _pins, \
}
static const struct tegra_gpio_port tegra194_main_ports[] = {
- TEGRA194_MAIN_GPIO_PORT( A, 0x1400, 8, 1),
- TEGRA194_MAIN_GPIO_PORT( B, 0x4e00, 2, 4),
- TEGRA194_MAIN_GPIO_PORT( C, 0x4600, 8, 4),
- TEGRA194_MAIN_GPIO_PORT( D, 0x4800, 4, 4),
- TEGRA194_MAIN_GPIO_PORT( E, 0x4a00, 8, 4),
- TEGRA194_MAIN_GPIO_PORT( F, 0x4c00, 6, 4),
- TEGRA194_MAIN_GPIO_PORT( G, 0x4000, 8, 4),
- TEGRA194_MAIN_GPIO_PORT( H, 0x4200, 8, 4),
- TEGRA194_MAIN_GPIO_PORT( I, 0x4400, 5, 4),
- TEGRA194_MAIN_GPIO_PORT( J, 0x5200, 6, 5),
- TEGRA194_MAIN_GPIO_PORT( K, 0x3000, 8, 3),
- TEGRA194_MAIN_GPIO_PORT( L, 0x3200, 4, 3),
- TEGRA194_MAIN_GPIO_PORT( M, 0x2600, 8, 2),
- TEGRA194_MAIN_GPIO_PORT( N, 0x2800, 3, 2),
- TEGRA194_MAIN_GPIO_PORT( O, 0x5000, 6, 5),
- TEGRA194_MAIN_GPIO_PORT( P, 0x2a00, 8, 2),
- TEGRA194_MAIN_GPIO_PORT( Q, 0x2c00, 8, 2),
- TEGRA194_MAIN_GPIO_PORT( R, 0x2e00, 6, 2),
- TEGRA194_MAIN_GPIO_PORT( S, 0x3600, 8, 3),
- TEGRA194_MAIN_GPIO_PORT( T, 0x3800, 8, 3),
- TEGRA194_MAIN_GPIO_PORT( U, 0x3a00, 1, 3),
- TEGRA194_MAIN_GPIO_PORT( V, 0x1000, 8, 1),
- TEGRA194_MAIN_GPIO_PORT( W, 0x1200, 2, 1),
- TEGRA194_MAIN_GPIO_PORT( X, 0x2000, 8, 2),
- TEGRA194_MAIN_GPIO_PORT( Y, 0x2200, 8, 2),
- TEGRA194_MAIN_GPIO_PORT( Z, 0x2400, 8, 2),
- TEGRA194_MAIN_GPIO_PORT(FF, 0x3400, 2, 3),
- TEGRA194_MAIN_GPIO_PORT(GG, 0x0000, 2, 0)
+ TEGRA194_MAIN_GPIO_PORT( A, 1, 2, 8),
+ TEGRA194_MAIN_GPIO_PORT( B, 4, 7, 2),
+ TEGRA194_MAIN_GPIO_PORT( C, 4, 3, 8),
+ TEGRA194_MAIN_GPIO_PORT( D, 4, 4, 4),
+ TEGRA194_MAIN_GPIO_PORT( E, 4, 5, 8),
+ TEGRA194_MAIN_GPIO_PORT( F, 4, 6, 6),
+ TEGRA194_MAIN_GPIO_PORT( G, 4, 0, 8),
+ TEGRA194_MAIN_GPIO_PORT( H, 4, 1, 8),
+ TEGRA194_MAIN_GPIO_PORT( I, 4, 2, 5),
+ TEGRA194_MAIN_GPIO_PORT( J, 5, 1, 6),
+ TEGRA194_MAIN_GPIO_PORT( K, 3, 0, 8),
+ TEGRA194_MAIN_GPIO_PORT( L, 3, 1, 4),
+ TEGRA194_MAIN_GPIO_PORT( M, 2, 3, 8),
+ TEGRA194_MAIN_GPIO_PORT( N, 2, 4, 3),
+ TEGRA194_MAIN_GPIO_PORT( O, 5, 0, 6),
+ TEGRA194_MAIN_GPIO_PORT( P, 2, 5, 8),
+ TEGRA194_MAIN_GPIO_PORT( Q, 2, 6, 8),
+ TEGRA194_MAIN_GPIO_PORT( R, 2, 7, 6),
+ TEGRA194_MAIN_GPIO_PORT( S, 3, 3, 8),
+ TEGRA194_MAIN_GPIO_PORT( T, 3, 4, 8),
+ TEGRA194_MAIN_GPIO_PORT( U, 3, 5, 1),
+ TEGRA194_MAIN_GPIO_PORT( V, 1, 0, 8),
+ TEGRA194_MAIN_GPIO_PORT( W, 1, 1, 2),
+ TEGRA194_MAIN_GPIO_PORT( X, 2, 0, 8),
+ TEGRA194_MAIN_GPIO_PORT( Y, 2, 1, 8),
+ TEGRA194_MAIN_GPIO_PORT( Z, 2, 2, 8),
+ TEGRA194_MAIN_GPIO_PORT(FF, 3, 2, 2),
+ TEGRA194_MAIN_GPIO_PORT(GG, 0, 0, 2)
};
static const struct tegra_gpio_soc tegra194_main_soc = {
.instance = 0,
};
-#define TEGRA194_AON_GPIO_PORT(port, base, count, controller) \
- [TEGRA194_AON_GPIO_PORT_##port] = { \
- .name = #port, \
- .offset = base, \
- .pins = count, \
- .irq = controller, \
+#define TEGRA194_AON_GPIO_PORT(_name, _bank, _port, _pins) \
+ [TEGRA194_AON_GPIO_PORT_##_name] = { \
+ .name = #_name, \
+ .bank = _bank, \
+ .port = _port, \
+ .pins = _pins, \
}
static const struct tegra_gpio_port tegra194_aon_ports[] = {
- TEGRA194_AON_GPIO_PORT(AA, 0x0600, 8, 0),
- TEGRA194_AON_GPIO_PORT(BB, 0x0800, 4, 0),
- TEGRA194_AON_GPIO_PORT(CC, 0x0200, 8, 0),
- TEGRA194_AON_GPIO_PORT(DD, 0x0400, 3, 0),
- TEGRA194_AON_GPIO_PORT(EE, 0x0000, 7, 0)
+ TEGRA194_AON_GPIO_PORT(AA, 0, 3, 8),
+ TEGRA194_AON_GPIO_PORT(BB, 0, 4, 4),
+ TEGRA194_AON_GPIO_PORT(CC, 0, 1, 8),
+ TEGRA194_AON_GPIO_PORT(DD, 0, 2, 3),
+ TEGRA194_AON_GPIO_PORT(EE, 0, 0, 7)
};
static const struct tegra_gpio_soc tegra194_aon_soc = {
static struct platform_driver bcm_iproc_gpio_driver = {
.driver = {
.name = "iproc-xgs-gpio",
- .owner = THIS_MODULE,
.of_match_table = bcm_iproc_gpio_of_match,
},
.probe = iproc_gpio_probe,
(GPIOHANDLE_REQUEST_INPUT | \
GPIOHANDLE_REQUEST_OUTPUT | \
GPIOHANDLE_REQUEST_ACTIVE_LOW | \
+ GPIOHANDLE_REQUEST_BIAS_PULL_UP | \
+ GPIOHANDLE_REQUEST_BIAS_PULL_DOWN | \
+ GPIOHANDLE_REQUEST_BIAS_DISABLE | \
GPIOHANDLE_REQUEST_OPEN_DRAIN | \
GPIOHANDLE_REQUEST_OPEN_SOURCE)
+static int linehandle_validate_flags(u32 flags)
+{
+ /* Return an error if an unknown flag is set */
+ if (flags & ~GPIOHANDLE_REQUEST_VALID_FLAGS)
+ return -EINVAL;
+
+ /*
+ * Do not allow both INPUT & OUTPUT flags to be set as they are
+ * contradictory.
+ */
+ if ((flags & GPIOHANDLE_REQUEST_INPUT) &&
+ (flags & GPIOHANDLE_REQUEST_OUTPUT))
+ return -EINVAL;
+
+ /*
+ * Do not allow OPEN_SOURCE & OPEN_DRAIN flags in a single request. If
+ * the hardware actually supports enabling both at the same time the
+ * electrical result would be disastrous.
+ */
+ if ((flags & GPIOHANDLE_REQUEST_OPEN_DRAIN) &&
+ (flags & GPIOHANDLE_REQUEST_OPEN_SOURCE))
+ return -EINVAL;
+
+ /* OPEN_DRAIN and OPEN_SOURCE flags only make sense for output mode. */
+ if (!(flags & GPIOHANDLE_REQUEST_OUTPUT) &&
+ ((flags & GPIOHANDLE_REQUEST_OPEN_DRAIN) ||
+ (flags & GPIOHANDLE_REQUEST_OPEN_SOURCE)))
+ return -EINVAL;
+
+ /* Bias flags only allowed for input or output mode. */
+ if (!((flags & GPIOHANDLE_REQUEST_INPUT) ||
+ (flags & GPIOHANDLE_REQUEST_OUTPUT)) &&
+ ((flags & GPIOHANDLE_REQUEST_BIAS_DISABLE) ||
+ (flags & GPIOHANDLE_REQUEST_BIAS_PULL_UP) ||
+ (flags & GPIOHANDLE_REQUEST_BIAS_PULL_DOWN)))
+ return -EINVAL;
+
+ /* Only one bias flag can be set. */
+ if (((flags & GPIOHANDLE_REQUEST_BIAS_DISABLE) &&
+ (flags & (GPIOHANDLE_REQUEST_BIAS_PULL_DOWN |
+ GPIOHANDLE_REQUEST_BIAS_PULL_UP))) ||
+ ((flags & GPIOHANDLE_REQUEST_BIAS_PULL_DOWN) &&
+ (flags & GPIOHANDLE_REQUEST_BIAS_PULL_UP)))
+ return -EINVAL;
+
+ return 0;
+}
+
+static void linehandle_configure_flag(unsigned long *flagsp,
+ u32 bit, bool active)
+{
+ if (active)
+ set_bit(bit, flagsp);
+ else
+ clear_bit(bit, flagsp);
+}
+
+static long linehandle_set_config(struct linehandle_state *lh,
+ void __user *ip)
+{
+ struct gpiohandle_config gcnf;
+ struct gpio_desc *desc;
+ int i, ret;
+ u32 lflags;
+ unsigned long *flagsp;
+
+ if (copy_from_user(&gcnf, ip, sizeof(gcnf)))
+ return -EFAULT;
+
+ lflags = gcnf.flags;
+ ret = linehandle_validate_flags(lflags);
+ if (ret)
+ return ret;
+
+ for (i = 0; i < lh->numdescs; i++) {
+ desc = lh->descs[i];
+ flagsp = &desc->flags;
+
+ linehandle_configure_flag(flagsp, FLAG_ACTIVE_LOW,
+ lflags & GPIOHANDLE_REQUEST_ACTIVE_LOW);
+
+ linehandle_configure_flag(flagsp, FLAG_OPEN_DRAIN,
+ lflags & GPIOHANDLE_REQUEST_OPEN_DRAIN);
+
+ linehandle_configure_flag(flagsp, FLAG_OPEN_SOURCE,
+ lflags & GPIOHANDLE_REQUEST_OPEN_SOURCE);
+
+ linehandle_configure_flag(flagsp, FLAG_PULL_UP,
+ lflags & GPIOHANDLE_REQUEST_BIAS_PULL_UP);
+
+ linehandle_configure_flag(flagsp, FLAG_PULL_DOWN,
+ lflags & GPIOHANDLE_REQUEST_BIAS_PULL_DOWN);
+
+ linehandle_configure_flag(flagsp, FLAG_BIAS_DISABLE,
+ lflags & GPIOHANDLE_REQUEST_BIAS_DISABLE);
+
+ /*
+ * Lines have to be requested explicitly for input
+ * or output, else the line will be treated "as is".
+ */
+ if (lflags & GPIOHANDLE_REQUEST_OUTPUT) {
+ int val = !!gcnf.default_values[i];
+
+ ret = gpiod_direction_output(desc, val);
+ if (ret)
+ return ret;
+ } else if (lflags & GPIOHANDLE_REQUEST_INPUT) {
+ ret = gpiod_direction_input(desc);
+ if (ret)
+ return ret;
+ }
+ }
+ return 0;
+}
+
static long linehandle_ioctl(struct file *filep, unsigned int cmd,
unsigned long arg)
{
lh->descs,
NULL,
vals);
+ } else if (cmd == GPIOHANDLE_SET_CONFIG_IOCTL) {
+ return linehandle_set_config(lh, ip);
}
return -EINVAL;
}
lflags = handlereq.flags;
- /* Return an error if an unknown flag is set */
- if (lflags & ~GPIOHANDLE_REQUEST_VALID_FLAGS)
- return -EINVAL;
-
- /*
- * Do not allow both INPUT & OUTPUT flags to be set as they are
- * contradictory.
- */
- if ((lflags & GPIOHANDLE_REQUEST_INPUT) &&
- (lflags & GPIOHANDLE_REQUEST_OUTPUT))
- return -EINVAL;
-
- /*
- * Do not allow OPEN_SOURCE & OPEN_DRAIN flags in a single request. If
- * the hardware actually supports enabling both at the same time the
- * electrical result would be disastrous.
- */
- if ((lflags & GPIOHANDLE_REQUEST_OPEN_DRAIN) &&
- (lflags & GPIOHANDLE_REQUEST_OPEN_SOURCE))
- return -EINVAL;
-
- /* OPEN_DRAIN and OPEN_SOURCE flags only make sense for output mode. */
- if (!(lflags & GPIOHANDLE_REQUEST_OUTPUT) &&
- ((lflags & GPIOHANDLE_REQUEST_OPEN_DRAIN) ||
- (lflags & GPIOHANDLE_REQUEST_OPEN_SOURCE)))
- return -EINVAL;
+ ret = linehandle_validate_flags(lflags);
+ if (ret)
+ return ret;
lh = kzalloc(sizeof(*lh), GFP_KERNEL);
if (!lh)
set_bit(FLAG_OPEN_DRAIN, &desc->flags);
if (lflags & GPIOHANDLE_REQUEST_OPEN_SOURCE)
set_bit(FLAG_OPEN_SOURCE, &desc->flags);
+ if (lflags & GPIOHANDLE_REQUEST_BIAS_DISABLE)
+ set_bit(FLAG_BIAS_DISABLE, &desc->flags);
+ if (lflags & GPIOHANDLE_REQUEST_BIAS_PULL_DOWN)
+ set_bit(FLAG_PULL_DOWN, &desc->flags);
+ if (lflags & GPIOHANDLE_REQUEST_BIAS_PULL_UP)
+ set_bit(FLAG_PULL_UP, &desc->flags);
ret = gpiod_set_transitory(desc, false);
if (ret < 0)
(lflags & GPIOHANDLE_REQUEST_OPEN_SOURCE))
return -EINVAL;
+ /* Only one bias flag can be set. */
+ if (((lflags & GPIOHANDLE_REQUEST_BIAS_DISABLE) &&
+ (lflags & (GPIOHANDLE_REQUEST_BIAS_PULL_DOWN |
+ GPIOHANDLE_REQUEST_BIAS_PULL_UP))) ||
+ ((lflags & GPIOHANDLE_REQUEST_BIAS_PULL_DOWN) &&
+ (lflags & GPIOHANDLE_REQUEST_BIAS_PULL_UP)))
+ return -EINVAL;
+
le = kzalloc(sizeof(*le), GFP_KERNEL);
if (!le)
return -ENOMEM;
if (lflags & GPIOHANDLE_REQUEST_ACTIVE_LOW)
set_bit(FLAG_ACTIVE_LOW, &desc->flags);
+ if (lflags & GPIOHANDLE_REQUEST_BIAS_DISABLE)
+ set_bit(FLAG_BIAS_DISABLE, &desc->flags);
+ if (lflags & GPIOHANDLE_REQUEST_BIAS_PULL_DOWN)
+ set_bit(FLAG_PULL_DOWN, &desc->flags);
+ if (lflags & GPIOHANDLE_REQUEST_BIAS_PULL_UP)
+ set_bit(FLAG_PULL_UP, &desc->flags);
ret = gpiod_direction_input(desc);
if (ret)
if (test_bit(FLAG_OPEN_SOURCE, &desc->flags))
lineinfo.flags |= (GPIOLINE_FLAG_OPEN_SOURCE |
GPIOLINE_FLAG_IS_OUT);
+ if (test_bit(FLAG_BIAS_DISABLE, &desc->flags))
+ lineinfo.flags |= GPIOLINE_FLAG_BIAS_DISABLE;
+ if (test_bit(FLAG_PULL_DOWN, &desc->flags))
+ lineinfo.flags |= GPIOLINE_FLAG_BIAS_PULL_DOWN;
+ if (test_bit(FLAG_PULL_UP, &desc->flags))
+ lineinfo.flags |= GPIOLINE_FLAG_BIAS_PULL_UP;
if (copy_to_user(ip, &lineinfo, sizeof(lineinfo)))
return -EFAULT;
clear_bit(FLAG_REQUESTED, &desc->flags);
clear_bit(FLAG_OPEN_DRAIN, &desc->flags);
clear_bit(FLAG_OPEN_SOURCE, &desc->flags);
+ clear_bit(FLAG_PULL_UP, &desc->flags);
+ clear_bit(FLAG_PULL_DOWN, &desc->flags);
+ clear_bit(FLAG_BIAS_DISABLE, &desc->flags);
clear_bit(FLAG_IS_HOGGED, &desc->flags);
ret = true;
}
unsigned arg;
switch (mode) {
+ case PIN_CONFIG_BIAS_DISABLE:
case PIN_CONFIG_BIAS_PULL_DOWN:
case PIN_CONFIG_BIAS_PULL_UP:
arg = 1;
return gc->set_config ? gc->set_config(gc, offset, config) : -ENOTSUPP;
}
+static int gpio_set_bias(struct gpio_chip *chip, struct gpio_desc *desc)
+{
+ int bias = 0;
+ int ret = 0;
+
+ if (test_bit(FLAG_BIAS_DISABLE, &desc->flags))
+ bias = PIN_CONFIG_BIAS_DISABLE;
+ else if (test_bit(FLAG_PULL_UP, &desc->flags))
+ bias = PIN_CONFIG_BIAS_PULL_UP;
+ else if (test_bit(FLAG_PULL_DOWN, &desc->flags))
+ bias = PIN_CONFIG_BIAS_PULL_DOWN;
+
+ if (bias) {
+ ret = gpio_set_config(chip, gpio_chip_hwgpio(desc), bias);
+ if (ret != -ENOTSUPP)
+ return ret;
+ }
+ return 0;
+}
+
/**
* gpiod_direction_input - set the GPIO direction to input
* @desc: GPIO to set to input
__func__);
return -EIO;
}
- if (ret == 0)
+ if (ret == 0) {
clear_bit(FLAG_IS_OUT, &desc->flags);
-
- if (test_bit(FLAG_PULL_UP, &desc->flags))
- gpio_set_config(chip, gpio_chip_hwgpio(desc),
- PIN_CONFIG_BIAS_PULL_UP);
- else if (test_bit(FLAG_PULL_DOWN, &desc->flags))
- gpio_set_config(chip, gpio_chip_hwgpio(desc),
- PIN_CONFIG_BIAS_PULL_DOWN);
+ ret = gpio_set_bias(chip, desc);
+ }
trace_gpio_direction(desc_to_gpio(desc), 1, ret);
}
set_output_value:
+ ret = gpio_set_bias(gc, desc);
+ if (ret)
+ return ret;
return gpiod_direction_output_raw_commit(desc, value);
set_output_flag:
#define FLAG_TRANSITORY 12 /* GPIO may lose value in sleep or reset */
#define FLAG_PULL_UP 13 /* GPIO has pull up enabled */
#define FLAG_PULL_DOWN 14 /* GPIO has pull down enabled */
+#define FLAG_BIAS_DISABLE 15 /* GPIO has pull disabled */
/* Connection label */
const char *label;
else
dvi->connector_type = DRM_MODE_CONNECTOR_DVID;
- dvi->hpd = fwnode_get_named_gpiod(&connector_node->fwnode,
- "hpd-gpios", 0, GPIOD_IN, "hpd");
+ dvi->hpd = fwnode_gpiod_get_index(&connector_node->fwnode,
+ "hpd", 0, GPIOD_IN, "hpd");
if (IS_ERR(dvi->hpd)) {
ret = PTR_ERR(dvi->hpd);
dvi->hpd = NULL;
static void delay_drop_debugfs_cleanup(struct mlx5_ib_dev *dev)
{
- if (!dev->delay_drop.dbg)
+ if (!dev->delay_drop.dir_debugfs)
return;
- debugfs_remove_recursive(dev->delay_drop.dbg->dir_debugfs);
- kfree(dev->delay_drop.dbg);
- dev->delay_drop.dbg = NULL;
+ debugfs_remove_recursive(dev->delay_drop.dir_debugfs);
+ dev->delay_drop.dir_debugfs = NULL;
}
static void cancel_delay_drop(struct mlx5_ib_dev *dev)
.read = delay_drop_timeout_read,
};
-static int delay_drop_debugfs_init(struct mlx5_ib_dev *dev)
+static void delay_drop_debugfs_init(struct mlx5_ib_dev *dev)
{
- struct mlx5_ib_dbg_delay_drop *dbg;
+ struct dentry *root;
if (!mlx5_debugfs_root)
- return 0;
-
- dbg = kzalloc(sizeof(*dbg), GFP_KERNEL);
- if (!dbg)
- return -ENOMEM;
-
- dev->delay_drop.dbg = dbg;
-
- dbg->dir_debugfs =
- debugfs_create_dir("delay_drop",
- dev->mdev->priv.dbg_root);
- if (!dbg->dir_debugfs)
- goto out_debugfs;
-
- dbg->events_cnt_debugfs =
- debugfs_create_atomic_t("num_timeout_events", 0400,
- dbg->dir_debugfs,
- &dev->delay_drop.events_cnt);
- if (!dbg->events_cnt_debugfs)
- goto out_debugfs;
-
- dbg->rqs_cnt_debugfs =
- debugfs_create_atomic_t("num_rqs", 0400,
- dbg->dir_debugfs,
- &dev->delay_drop.rqs_cnt);
- if (!dbg->rqs_cnt_debugfs)
- goto out_debugfs;
-
- dbg->timeout_debugfs =
- debugfs_create_file("timeout", 0600,
- dbg->dir_debugfs,
- &dev->delay_drop,
- &fops_delay_drop_timeout);
- if (!dbg->timeout_debugfs)
- goto out_debugfs;
+ return;
- return 0;
+ root = debugfs_create_dir("delay_drop", dev->mdev->priv.dbg_root);
+ dev->delay_drop.dir_debugfs = root;
-out_debugfs:
- delay_drop_debugfs_cleanup(dev);
- return -ENOMEM;
+ debugfs_create_atomic_t("num_timeout_events", 0400, root,
+ &dev->delay_drop.events_cnt);
+ debugfs_create_atomic_t("num_rqs", 0400, root,
+ &dev->delay_drop.rqs_cnt);
+ debugfs_create_file("timeout", 0600, root, &dev->delay_drop,
+ &fops_delay_drop_timeout);
}
static void init_delay_drop(struct mlx5_ib_dev *dev)
atomic_set(&dev->delay_drop.rqs_cnt, 0);
atomic_set(&dev->delay_drop.events_cnt, 0);
- if (delay_drop_debugfs_init(dev))
- mlx5_ib_warn(dev, "Failed to init delay drop debugfs\n");
+ delay_drop_debugfs_init(dev);
}
static void mlx5_ib_unbind_slave_port(struct mlx5_ib_dev *ibdev,
MLX5_MAX_DELAY_DROP_TIMEOUT_MS = 100,
};
-struct mlx5_ib_dbg_delay_drop {
- struct dentry *dir_debugfs;
- struct dentry *rqs_cnt_debugfs;
- struct dentry *events_cnt_debugfs;
- struct dentry *timeout_debugfs;
-};
-
struct mlx5_ib_delay_drop {
struct mlx5_ib_dev *dev;
struct work_struct delay_drop_work;
bool activate;
atomic_t events_cnt;
atomic_t rqs_cnt;
- struct mlx5_ib_dbg_delay_drop *dbg;
+ struct dentry *dir_debugfs;
};
enum mlx5_ib_stages {
void c8sectpfe_debugfs_init(struct c8sectpfei *fei)
{
- struct dentry *root;
- struct dentry *file;
-
- root = debugfs_create_dir("c8sectpfe", NULL);
- if (!root)
- goto err;
-
- fei->root = root;
-
fei->regset = devm_kzalloc(fei->dev, sizeof(*fei->regset), GFP_KERNEL);
if (!fei->regset)
- goto err;
+ return;
fei->regset->regs = fei_sys_regs;
fei->regset->nregs = ARRAY_SIZE(fei_sys_regs);
fei->regset->base = fei->io;
- file = debugfs_create_regset32("registers", S_IRUGO, root,
- fei->regset);
- if (!file) {
- dev_err(fei->dev,
- "%s not able to create 'registers' debugfs\n"
- , __func__);
- goto err;
- }
-
- return;
-
-err:
- debugfs_remove_recursive(root);
+ fei->root = debugfs_create_dir("c8sectpfe", NULL);
+ debugfs_create_regset32("registers", S_IRUGO, fei->root, fei->regset);
}
void c8sectpfe_debugfs_exit(struct c8sectpfei *fei)
static int sram_probe(struct platform_device *pdev)
{
struct sram_dev *sram;
- struct resource *res;
- size_t size;
int ret;
int (*init_func)(void);
sram->dev = &pdev->dev;
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res) {
- dev_err(sram->dev, "found no memory resource\n");
- return -EINVAL;
- }
-
- size = resource_size(res);
-
- if (!devm_request_mem_region(sram->dev, res->start, size, pdev->name)) {
- dev_err(sram->dev, "could not request region for resource\n");
- return -EBUSY;
- }
-
if (of_property_read_bool(pdev->dev.of_node, "no-memory-wc"))
- sram->virt_base = devm_ioremap(sram->dev, res->start, size);
+ sram->virt_base = devm_platform_ioremap_resource(pdev, 0);
else
- sram->virt_base = devm_ioremap_wc(sram->dev, res->start, size);
- if (!sram->virt_base)
- return -ENOMEM;
+ sram->virt_base = devm_platform_ioremap_resource_wc(pdev, 0);
+ if (IS_ERR(sram->virt_base)) {
+ dev_err(&pdev->dev, "could not map SRAM registers\n");
+ return PTR_ERR(sram->virt_base);
+ }
sram->pool = devm_gen_pool_create(sram->dev, ilog2(SRAM_GRANULARITY),
NUMA_NO_NODE, NULL);
else
clk_prepare_enable(sram->clk);
- ret = sram_reserve_regions(sram, res);
+ ret = sram_reserve_regions(sram,
+ platform_get_resource(pdev, IORESOURCE_MEM, 0));
if (ret)
goto err_disable_clk;
debugfs_create_file("regs", S_IRUSR, root, host, &atmci_regs_fops);
debugfs_create_file("req", S_IRUSR, root, slot, &atmci_req_fops);
- debugfs_create_u32("state", S_IRUSR, root, (u32 *)&host->state);
- debugfs_create_x32("pending_events", S_IRUSR, root,
- (u32 *)&host->pending_events);
- debugfs_create_x32("completed_events", S_IRUSR, root,
- (u32 *)&host->completed_events);
+ debugfs_create_u32("state", S_IRUSR, root, &host->state);
+ debugfs_create_xul("pending_events", S_IRUSR, root,
+ &host->pending_events);
+ debugfs_create_xul("completed_events", S_IRUSR, root,
+ &host->completed_events);
}
#if defined(CONFIG_OF)
debugfs_create_file("regs", S_IRUSR, root, host, &dw_mci_regs_fops);
debugfs_create_file("req", S_IRUSR, root, slot, &dw_mci_req_fops);
- debugfs_create_u32("state", S_IRUSR, root, (u32 *)&host->state);
- debugfs_create_x32("pending_events", S_IRUSR, root,
- (u32 *)&host->pending_events);
- debugfs_create_x32("completed_events", S_IRUSR, root,
- (u32 *)&host->completed_events);
+ debugfs_create_u32("state", S_IRUSR, root, &host->state);
+ debugfs_create_xul("pending_events", S_IRUSR, root,
+ &host->pending_events);
+ debugfs_create_xul("completed_events", S_IRUSR, root,
+ &host->completed_events);
}
#endif /* defined(CONFIG_DEBUG_FS) */
debugfs_create_blob("last_rx_msg", 0400, ser->debugfs_tty_dir,
&ser->rx_blob);
- debugfs_create_x32("ser_state", 0400, ser->debugfs_tty_dir,
- (u32 *)&ser->state);
+ debugfs_create_xul("ser_state", 0400, ser->debugfs_tty_dir,
+ &ser->state);
debugfs_create_x8("tty_status", 0400, ser->debugfs_tty_dir,
&ser->tty_status);
static void pp_setup_dbgfs(struct pp_ctx *pp)
{
struct pci_dev *pdev = pp->ntb->pdev;
- void *ret;
pp->dbgfs_dir = debugfs_create_dir(pci_name(pdev), pp_dbgfs_topdir);
- ret = debugfs_create_atomic_t("count", 0600, pp->dbgfs_dir, &pp->count);
- if (!ret)
- dev_warn(&pp->ntb->dev, "DebugFS unsupported\n");
+ debugfs_create_atomic_t("count", 0600, pp->dbgfs_dir, &pp->count);
}
static void pp_clear_dbgfs(struct pp_ctx *pp)
pr_debug("%s()\n", __func__);
pr_debug(" starting at: %pOF\n", root);
+ device_links_supplier_sync_state_pause();
for_each_child_of_node(root, child) {
rc = of_platform_bus_create(child, matches, lookup, parent, true);
if (rc) {
break;
}
}
+ device_links_supplier_sync_state_resume();
+
of_node_set_flag(root, OF_POPULATED_BUS);
of_node_put(root);
if (!of_have_populated_dt())
return -ENODEV;
+ device_links_supplier_sync_state_pause();
/*
* Handle certain compatibles explicitly, since we don't want to create
* platform_devices for every node in /reserved-memory with a
return 0;
}
arch_initcall_sync(of_platform_default_populate_init);
+
+static int __init of_platform_sync_state_init(void)
+{
+ if (of_have_populated_dt())
+ device_links_supplier_sync_state_resume();
+ return 0;
+}
+late_initcall_sync(of_platform_sync_state_init);
#endif
int of_platform_device_destroy(struct device *dev, void *data)
#include <linux/of_device.h>
#include <linux/of_graph.h>
#include <linux/string.h>
+#include <linux/moduleparam.h>
#include "of_private.h"
return of_device_get_match_data(dev);
}
+static bool of_is_ancestor_of(struct device_node *test_ancestor,
+ struct device_node *child)
+{
+ of_node_get(child);
+ while (child) {
+ if (child == test_ancestor) {
+ of_node_put(child);
+ return false;
+ }
+ child = of_get_next_parent(child);
+ }
+ return true;
+}
+
+/**
+ * of_link_to_phandle - Add device link to supplier from supplier phandle
+ * @dev: consumer device
+ * @sup_np: phandle to supplier device tree node
+ *
+ * Given a phandle to a supplier device tree node (@sup_np), this function
+ * finds the device that owns the supplier device tree node and creates a
+ * device link from @dev consumer device to the supplier device. This function
+ * doesn't create device links for invalid scenarios such as trying to create a
+ * link with a parent device as the consumer of its child device. In such
+ * cases, it returns an error.
+ *
+ * Returns:
+ * - 0 if link successfully created to supplier
+ * - -EAGAIN if linking to the supplier should be reattempted
+ * - -EINVAL if the supplier link is invalid and should not be created
+ * - -ENODEV if there is no device that corresponds to the supplier phandle
+ */
+static int of_link_to_phandle(struct device *dev, struct device_node *sup_np,
+ u32 dl_flags)
+{
+ struct device *sup_dev;
+ int ret = 0;
+ struct device_node *tmp_np = sup_np;
+ int is_populated;
+
+ of_node_get(sup_np);
+ /*
+ * Find the device node that contains the supplier phandle. It may be
+ * @sup_np or it may be an ancestor of @sup_np.
+ */
+ while (sup_np && !of_find_property(sup_np, "compatible", NULL))
+ sup_np = of_get_next_parent(sup_np);
+ if (!sup_np) {
+ dev_dbg(dev, "Not linking to %pOFP - No device\n", tmp_np);
+ return -ENODEV;
+ }
+
+ /*
+ * Don't allow linking a device node as a consumer of one of its
+ * descendant nodes. By definition, a child node can't be a functional
+ * dependency for the parent node.
+ */
+ if (!of_is_ancestor_of(dev->of_node, sup_np)) {
+ dev_dbg(dev, "Not linking to %pOFP - is descendant\n", sup_np);
+ of_node_put(sup_np);
+ return -EINVAL;
+ }
+ sup_dev = get_dev_from_fwnode(&sup_np->fwnode);
+ is_populated = of_node_check_flag(sup_np, OF_POPULATED);
+ of_node_put(sup_np);
+ if (!sup_dev && is_populated) {
+ /* Early device without struct device. */
+ dev_dbg(dev, "Not linking to %pOFP - No struct device\n",
+ sup_np);
+ return -ENODEV;
+ } else if (!sup_dev) {
+ return -EAGAIN;
+ }
+ if (!device_link_add(dev, sup_dev, dl_flags))
+ ret = -EAGAIN;
+ put_device(sup_dev);
+ return ret;
+}
+
+/**
+ * parse_prop_cells - Property parsing function for suppliers
+ *
+ * @np: Pointer to device tree node containing a list
+ * @prop_name: Name of property to be parsed. Expected to hold phandle values
+ * @index: For properties holding a list of phandles, this is the index
+ * into the list.
+ * @list_name: Property name that is known to contain list of phandle(s) to
+ * supplier(s)
+ * @cells_name: property name that specifies phandles' arguments count
+ *
+ * This is a helper function to parse properties that have a known fixed name
+ * and are a list of phandles and phandle arguments.
+ *
+ * Returns:
+ * - phandle node pointer with refcount incremented. Caller must of_node_put()
+ * on it when done.
+ * - NULL if no phandle found at index
+ */
+static struct device_node *parse_prop_cells(struct device_node *np,
+ const char *prop_name, int index,
+ const char *list_name,
+ const char *cells_name)
+{
+ struct of_phandle_args sup_args;
+
+ if (strcmp(prop_name, list_name))
+ return NULL;
+
+ if (of_parse_phandle_with_args(np, list_name, cells_name, index,
+ &sup_args))
+ return NULL;
+
+ return sup_args.np;
+}
+
+#define DEFINE_SIMPLE_PROP(fname, name, cells) \
+static struct device_node *parse_##fname(struct device_node *np, \
+ const char *prop_name, int index) \
+{ \
+ return parse_prop_cells(np, prop_name, index, name, cells); \
+}
+
+static int strcmp_suffix(const char *str, const char *suffix)
+{
+ unsigned int len, suffix_len;
+
+ len = strlen(str);
+ suffix_len = strlen(suffix);
+ if (len <= suffix_len)
+ return -1;
+ return strcmp(str + len - suffix_len, suffix);
+}
+
+/**
+ * parse_suffix_prop_cells - Suffix property parsing function for suppliers
+ *
+ * @np: Pointer to device tree node containing a list
+ * @prop_name: Name of property to be parsed. Expected to hold phandle values
+ * @index: For properties holding a list of phandles, this is the index
+ * into the list.
+ * @suffix: Property suffix that is known to contain list of phandle(s) to
+ * supplier(s)
+ * @cells_name: property name that specifies phandles' arguments count
+ *
+ * This is a helper function to parse properties that have a known fixed suffix
+ * and are a list of phandles and phandle arguments.
+ *
+ * Returns:
+ * - phandle node pointer with refcount incremented. Caller must of_node_put()
+ * on it when done.
+ * - NULL if no phandle found at index
+ */
+static struct device_node *parse_suffix_prop_cells(struct device_node *np,
+ const char *prop_name, int index,
+ const char *suffix,
+ const char *cells_name)
+{
+ struct of_phandle_args sup_args;
+
+ if (strcmp_suffix(prop_name, suffix))
+ return NULL;
+
+ if (of_parse_phandle_with_args(np, prop_name, cells_name, index,
+ &sup_args))
+ return NULL;
+
+ return sup_args.np;
+}
+
+#define DEFINE_SUFFIX_PROP(fname, suffix, cells) \
+static struct device_node *parse_##fname(struct device_node *np, \
+ const char *prop_name, int index) \
+{ \
+ return parse_suffix_prop_cells(np, prop_name, index, suffix, cells); \
+}
+
+/**
+ * struct supplier_bindings - Property parsing functions for suppliers
+ *
+ * @parse_prop: function name
+ * parse_prop() finds the node corresponding to a supplier phandle
+ * @parse_prop.np: Pointer to device node holding supplier phandle property
+ * @parse_prop.prop_name: Name of property holding a phandle value
+ * @parse_prop.index: For properties holding a list of phandles, this is the
+ * index into the list
+ *
+ * Returns:
+ * parse_prop() return values are
+ * - phandle node pointer with refcount incremented. Caller must of_node_put()
+ * on it when done.
+ * - NULL if no phandle found at index
+ */
+struct supplier_bindings {
+ struct device_node *(*parse_prop)(struct device_node *np,
+ const char *prop_name, int index);
+};
+
+DEFINE_SIMPLE_PROP(clocks, "clocks", "#clock-cells")
+DEFINE_SIMPLE_PROP(interconnects, "interconnects", "#interconnect-cells")
+DEFINE_SIMPLE_PROP(iommus, "iommus", "#iommu-cells")
+DEFINE_SIMPLE_PROP(mboxes, "mboxes", "#mbox-cells")
+DEFINE_SIMPLE_PROP(io_channels, "io-channel", "#io-channel-cells")
+DEFINE_SUFFIX_PROP(regulators, "-supply", NULL)
+
+static const struct supplier_bindings of_supplier_bindings[] = {
+ { .parse_prop = parse_clocks, },
+ { .parse_prop = parse_interconnects, },
+ { .parse_prop = parse_iommus, },
+ { .parse_prop = parse_mboxes, },
+ { .parse_prop = parse_io_channels, },
+ { .parse_prop = parse_regulators, },
+ {}
+};
+
+/**
+ * of_link_property - Create device links to suppliers listed in a property
+ * @dev: Consumer device
+ * @con_np: The consumer device tree node which contains the property
+ * @prop_name: Name of property to be parsed
+ *
+ * This function checks if the property @prop_name that is present in the
+ * @con_np device tree node is one of the known common device tree bindings
+ * that list phandles to suppliers. If @prop_name isn't one, this function
+ * doesn't do anything.
+ *
+ * If @prop_name is one, this function attempts to create device links from the
+ * consumer device @dev to all the devices of the suppliers listed in
+ * @prop_name.
+ *
+ * Any failed attempt to create a device link will NOT result in an immediate
+ * return. of_link_property() must create links to all the available supplier
+ * devices even when attempts to create a link to one or more suppliers fail.
+ */
+static int of_link_property(struct device *dev, struct device_node *con_np,
+ const char *prop_name)
+{
+ struct device_node *phandle;
+ const struct supplier_bindings *s = of_supplier_bindings;
+ unsigned int i = 0;
+ bool matched = false;
+ int ret = 0;
+ u32 dl_flags;
+
+ if (dev->of_node == con_np)
+ dl_flags = DL_FLAG_AUTOPROBE_CONSUMER;
+ else
+ dl_flags = DL_FLAG_SYNC_STATE_ONLY;
+
+ /* Do not stop at first failed link, link all available suppliers. */
+ while (!matched && s->parse_prop) {
+ while ((phandle = s->parse_prop(con_np, prop_name, i))) {
+ matched = true;
+ i++;
+ if (of_link_to_phandle(dev, phandle, dl_flags)
+ == -EAGAIN)
+ ret = -EAGAIN;
+ of_node_put(phandle);
+ }
+ s++;
+ }
+ return ret;
+}
+
+static int of_link_to_suppliers(struct device *dev,
+ struct device_node *con_np)
+{
+ struct device_node *child;
+ struct property *p;
+ int ret = 0;
+
+ for_each_property_of_node(con_np, p)
+ if (of_link_property(dev, con_np, p->name))
+ ret = -ENODEV;
+
+ for_each_child_of_node(con_np, child)
+ if (of_link_to_suppliers(dev, child) && !ret)
+ ret = -EAGAIN;
+
+ return ret;
+}
+
+static bool of_devlink;
+core_param(of_devlink, of_devlink, bool, 0);
+
+static int of_fwnode_add_links(const struct fwnode_handle *fwnode,
+ struct device *dev)
+{
+ if (!of_devlink)
+ return 0;
+
+ if (unlikely(!is_of_node(fwnode)))
+ return 0;
+
+ return of_link_to_suppliers(dev, to_of_node(fwnode));
+}
+
const struct fwnode_operations of_fwnode_ops = {
.get = of_fwnode_get,
.put = of_fwnode_put,
.graph_get_remote_endpoint = of_fwnode_graph_get_remote_endpoint,
.graph_get_port_parent = of_fwnode_graph_get_port_parent,
.graph_parse_endpoint = of_fwnode_graph_parse_endpoint,
+ .add_links = of_fwnode_add_links,
};
EXPORT_SYMBOL_GPL(of_fwnode_ops);
#ifdef CONFIG_SUPERH
#include <asm/sh_bios.h>
+#include <asm/platform_early.h>
#endif
#include "serial_mctrl_gpio.h"
.data = &sci_uart_driver,
};
+#ifdef CONFIG_SUPERH
static struct console early_serial_console = {
.name = "early_ttySC",
.write = serial_console_write,
register_console(&early_serial_console);
return 0;
}
+#endif
#define SCI_CONSOLE (&serial_console)
* the special early probe. We don't have sufficient device state
* to make it beyond this yet.
*/
- if (is_early_platform_device(dev))
+#ifdef CONFIG_SUPERH
+ if (is_sh_early_platform_device(dev))
return sci_probe_earlyprintk(dev);
+#endif
if (dev->dev.of_node) {
p = sci_parse_dt(dev, &dev_id);
uart_unregister_driver(&sci_uart_driver);
}
-#ifdef CONFIG_SERIAL_SH_SCI_CONSOLE
-early_platform_init_buffer("earlyprintk", &sci_driver,
+#if defined(CONFIG_SUPERH) && defined(CONFIG_SERIAL_SH_SCI_CONSOLE)
+sh_early_platform_init_buffer("earlyprintk", &sci_driver,
early_serial_buf, ARRAY_SIZE(early_serial_buf));
#endif
#ifdef CONFIG_SERIAL_SH_SCI_EARLYCON
* This function creates a file in debugfs with the given name that
* contains the value of the variable @value. If the @mode variable is so
* set, it can be read from, and written to.
- *
- * This function will return a pointer to a dentry if it succeeds. This
- * pointer must be passed to the debugfs_remove() function when the file is
- * to be removed (no automatic cleanup happens if your module is unloaded,
- * you are responsible here.) If an error occurs, %ERR_PTR(-ERROR) will be
- * returned.
- *
- * If debugfs is not enabled in the kernel, the value %ERR_PTR(-ENODEV) will
- * be returned.
*/
-struct dentry *debugfs_create_u8(const char *name, umode_t mode,
- struct dentry *parent, u8 *value)
+void debugfs_create_u8(const char *name, umode_t mode, struct dentry *parent,
+ u8 *value)
{
- return debugfs_create_mode_unsafe(name, mode, parent, value, &fops_u8,
+ debugfs_create_mode_unsafe(name, mode, parent, value, &fops_u8,
&fops_u8_ro, &fops_u8_wo);
}
EXPORT_SYMBOL_GPL(debugfs_create_u8);
* This function creates a file in debugfs with the given name that
* contains the value of the variable @value. If the @mode variable is so
* set, it can be read from, and written to.
- *
- * This function will return a pointer to a dentry if it succeeds. This
- * pointer must be passed to the debugfs_remove() function when the file is
- * to be removed (no automatic cleanup happens if your module is unloaded,
- * you are responsible here.) If an error occurs, %ERR_PTR(-ERROR) will be
- * returned.
- *
- * If debugfs is not enabled in the kernel, the value %ERR_PTR(-ENODEV) will
- * be returned.
*/
-struct dentry *debugfs_create_u16(const char *name, umode_t mode,
- struct dentry *parent, u16 *value)
+void debugfs_create_u16(const char *name, umode_t mode, struct dentry *parent,
+ u16 *value)
{
- return debugfs_create_mode_unsafe(name, mode, parent, value, &fops_u16,
+ debugfs_create_mode_unsafe(name, mode, parent, value, &fops_u16,
&fops_u16_ro, &fops_u16_wo);
}
EXPORT_SYMBOL_GPL(debugfs_create_u16);
* This function creates a file in debugfs with the given name that
* contains the value of the variable @value. If the @mode variable is so
* set, it can be read from, and written to.
- *
- * This function will return a pointer to a dentry if it succeeds. This
- * pointer must be passed to the debugfs_remove() function when the file is
- * to be removed (no automatic cleanup happens if your module is unloaded,
- * you are responsible here.) If an error occurs, %ERR_PTR(-ERROR) will be
- * returned.
- *
- * If debugfs is not enabled in the kernel, the value %ERR_PTR(-ENODEV) will
- * be returned.
*/
-struct dentry *debugfs_create_u64(const char *name, umode_t mode,
- struct dentry *parent, u64 *value)
+void debugfs_create_u64(const char *name, umode_t mode, struct dentry *parent,
+ u64 *value)
{
- return debugfs_create_mode_unsafe(name, mode, parent, value, &fops_u64,
+ debugfs_create_mode_unsafe(name, mode, parent, value, &fops_u64,
&fops_u64_ro, &fops_u64_wo);
}
EXPORT_SYMBOL_GPL(debugfs_create_u64);
* @value: a pointer to the variable that the file should read to and write
* from.
*/
-struct dentry *debugfs_create_x8(const char *name, umode_t mode,
- struct dentry *parent, u8 *value)
+void debugfs_create_x8(const char *name, umode_t mode, struct dentry *parent,
+ u8 *value)
{
- return debugfs_create_mode_unsafe(name, mode, parent, value, &fops_x8,
+ debugfs_create_mode_unsafe(name, mode, parent, value, &fops_x8,
&fops_x8_ro, &fops_x8_wo);
}
EXPORT_SYMBOL_GPL(debugfs_create_x8);
* @value: a pointer to the variable that the file should read to and write
* from.
*/
-struct dentry *debugfs_create_x16(const char *name, umode_t mode,
- struct dentry *parent, u16 *value)
+void debugfs_create_x16(const char *name, umode_t mode, struct dentry *parent,
+ u16 *value)
{
- return debugfs_create_mode_unsafe(name, mode, parent, value, &fops_x16,
+ debugfs_create_mode_unsafe(name, mode, parent, value, &fops_x16,
&fops_x16_ro, &fops_x16_wo);
}
EXPORT_SYMBOL_GPL(debugfs_create_x16);
* @value: a pointer to the variable that the file should read to and write
* from.
*/
-struct dentry *debugfs_create_x32(const char *name, umode_t mode,
- struct dentry *parent, u32 *value)
+void debugfs_create_x32(const char *name, umode_t mode, struct dentry *parent,
+ u32 *value)
{
- return debugfs_create_mode_unsafe(name, mode, parent, value, &fops_x32,
+ debugfs_create_mode_unsafe(name, mode, parent, value, &fops_x32,
&fops_x32_ro, &fops_x32_wo);
}
EXPORT_SYMBOL_GPL(debugfs_create_x32);
* @value: a pointer to the variable that the file should read to and write
* from.
*/
-struct dentry *debugfs_create_x64(const char *name, umode_t mode,
- struct dentry *parent, u64 *value)
+void debugfs_create_x64(const char *name, umode_t mode, struct dentry *parent,
+ u64 *value)
{
- return debugfs_create_mode_unsafe(name, mode, parent, value, &fops_x64,
+ debugfs_create_mode_unsafe(name, mode, parent, value, &fops_x64,
&fops_x64_ro, &fops_x64_wo);
}
EXPORT_SYMBOL_GPL(debugfs_create_x64);
* @value: a pointer to the variable that the file should read to and write
* from.
*/
-struct dentry *debugfs_create_size_t(const char *name, umode_t mode,
- struct dentry *parent, size_t *value)
+void debugfs_create_size_t(const char *name, umode_t mode,
+ struct dentry *parent, size_t *value)
{
- return debugfs_create_mode_unsafe(name, mode, parent, value,
- &fops_size_t, &fops_size_t_ro,
- &fops_size_t_wo);
+ debugfs_create_mode_unsafe(name, mode, parent, value, &fops_size_t,
+ &fops_size_t_ro, &fops_size_t_wo);
}
EXPORT_SYMBOL_GPL(debugfs_create_size_t);
* @value: a pointer to the variable that the file should read to and write
* from.
*/
-struct dentry *debugfs_create_atomic_t(const char *name, umode_t mode,
- struct dentry *parent, atomic_t *value)
+void debugfs_create_atomic_t(const char *name, umode_t mode,
+ struct dentry *parent, atomic_t *value)
{
- return debugfs_create_mode_unsafe(name, mode, parent, value,
- &fops_atomic_t, &fops_atomic_t_ro,
- &fops_atomic_t_wo);
+ debugfs_create_mode_unsafe(name, mode, parent, value, &fops_atomic_t,
+ &fops_atomic_t_ro, &fops_atomic_t_wo);
}
EXPORT_SYMBOL_GPL(debugfs_create_atomic_t);
struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,
struct dentry *new_dir, const char *new_name);
-struct dentry *debugfs_create_u8(const char *name, umode_t mode,
- struct dentry *parent, u8 *value);
-struct dentry *debugfs_create_u16(const char *name, umode_t mode,
- struct dentry *parent, u16 *value);
+void debugfs_create_u8(const char *name, umode_t mode, struct dentry *parent,
+ u8 *value);
+void debugfs_create_u16(const char *name, umode_t mode, struct dentry *parent,
+ u16 *value);
struct dentry *debugfs_create_u32(const char *name, umode_t mode,
struct dentry *parent, u32 *value);
-struct dentry *debugfs_create_u64(const char *name, umode_t mode,
- struct dentry *parent, u64 *value);
+void debugfs_create_u64(const char *name, umode_t mode, struct dentry *parent,
+ u64 *value);
struct dentry *debugfs_create_ulong(const char *name, umode_t mode,
struct dentry *parent, unsigned long *value);
-struct dentry *debugfs_create_x8(const char *name, umode_t mode,
- struct dentry *parent, u8 *value);
-struct dentry *debugfs_create_x16(const char *name, umode_t mode,
- struct dentry *parent, u16 *value);
-struct dentry *debugfs_create_x32(const char *name, umode_t mode,
- struct dentry *parent, u32 *value);
-struct dentry *debugfs_create_x64(const char *name, umode_t mode,
- struct dentry *parent, u64 *value);
-struct dentry *debugfs_create_size_t(const char *name, umode_t mode,
- struct dentry *parent, size_t *value);
-struct dentry *debugfs_create_atomic_t(const char *name, umode_t mode,
- struct dentry *parent, atomic_t *value);
+void debugfs_create_x8(const char *name, umode_t mode, struct dentry *parent,
+ u8 *value);
+void debugfs_create_x16(const char *name, umode_t mode, struct dentry *parent,
+ u16 *value);
+void debugfs_create_x32(const char *name, umode_t mode, struct dentry *parent,
+ u32 *value);
+void debugfs_create_x64(const char *name, umode_t mode, struct dentry *parent,
+ u64 *value);
+void debugfs_create_size_t(const char *name, umode_t mode,
+ struct dentry *parent, size_t *value);
+void debugfs_create_atomic_t(const char *name, umode_t mode,
+ struct dentry *parent, atomic_t *value);
struct dentry *debugfs_create_bool(const char *name, umode_t mode,
struct dentry *parent, bool *value);
return ERR_PTR(-ENODEV);
}
-static inline struct dentry *debugfs_create_u8(const char *name, umode_t mode,
- struct dentry *parent,
- u8 *value)
-{
- return ERR_PTR(-ENODEV);
-}
+static inline void debugfs_create_u8(const char *name, umode_t mode,
+ struct dentry *parent, u8 *value) { }
-static inline struct dentry *debugfs_create_u16(const char *name, umode_t mode,
- struct dentry *parent,
- u16 *value)
-{
- return ERR_PTR(-ENODEV);
-}
+static inline void debugfs_create_u16(const char *name, umode_t mode,
+ struct dentry *parent, u16 *value) { }
static inline struct dentry *debugfs_create_u32(const char *name, umode_t mode,
struct dentry *parent,
return ERR_PTR(-ENODEV);
}
-static inline struct dentry *debugfs_create_u64(const char *name, umode_t mode,
- struct dentry *parent,
- u64 *value)
-{
- return ERR_PTR(-ENODEV);
-}
+static inline void debugfs_create_u64(const char *name, umode_t mode,
+ struct dentry *parent, u64 *value) { }
static inline struct dentry *debugfs_create_ulong(const char *name,
umode_t mode,
return ERR_PTR(-ENODEV);
}
-static inline struct dentry *debugfs_create_x8(const char *name, umode_t mode,
- struct dentry *parent,
- u8 *value)
-{
- return ERR_PTR(-ENODEV);
-}
+static inline void debugfs_create_x8(const char *name, umode_t mode,
+ struct dentry *parent, u8 *value) { }
-static inline struct dentry *debugfs_create_x16(const char *name, umode_t mode,
- struct dentry *parent,
- u16 *value)
-{
- return ERR_PTR(-ENODEV);
-}
+static inline void debugfs_create_x16(const char *name, umode_t mode,
+ struct dentry *parent, u16 *value) { }
-static inline struct dentry *debugfs_create_x32(const char *name, umode_t mode,
- struct dentry *parent,
- u32 *value)
-{
- return ERR_PTR(-ENODEV);
-}
+static inline void debugfs_create_x32(const char *name, umode_t mode,
+ struct dentry *parent, u32 *value) { }
-static inline struct dentry *debugfs_create_x64(const char *name, umode_t mode,
- struct dentry *parent,
- u64 *value)
-{
- return ERR_PTR(-ENODEV);
-}
+static inline void debugfs_create_x64(const char *name, umode_t mode,
+ struct dentry *parent, u64 *value) { }
-static inline struct dentry *debugfs_create_size_t(const char *name, umode_t mode,
- struct dentry *parent,
- size_t *value)
-{
- return ERR_PTR(-ENODEV);
-}
+static inline void debugfs_create_size_t(const char *name, umode_t mode,
+ struct dentry *parent, size_t *value)
+{ }
-static inline struct dentry *debugfs_create_atomic_t(const char *name, umode_t mode,
- struct dentry *parent, atomic_t *value)
-{
- return ERR_PTR(-ENODEV);
-}
+static inline void debugfs_create_atomic_t(const char *name, umode_t mode,
+ struct dentry *parent,
+ atomic_t *value)
+{ }
static inline struct dentry *debugfs_create_bool(const char *name, umode_t mode,
struct dentry *parent,
#endif
+/**
+ * debugfs_create_xul - create a debugfs file that is used to read and write an
+ * unsigned long value, formatted in hexadecimal
+ * @name: a pointer to a string containing the name of the file to create.
+ * @mode: the permission that the file should have
+ * @parent: a pointer to the parent dentry for this file. This should be a
+ * directory dentry if set. If this parameter is %NULL, then the
+ * file will be created in the root of the debugfs filesystem.
+ * @value: a pointer to the variable that the file should read to and write
+ * from.
+ */
+static inline void debugfs_create_xul(const char *name, umode_t mode,
+ struct dentry *parent,
+ unsigned long *value)
+{
+ if (sizeof(*value) == sizeof(u32))
+ debugfs_create_x32(name, mode, parent, (u32 *)value);
+ else
+ debugfs_create_x64(name, mode, parent, (u64 *)value);
+}
+
#endif
* that generate uevents to add the environment variables.
* @probe: Called when a new device or driver add to this bus, and callback
* the specific driver's probe to initial the matched device.
+ * @sync_state: Called to sync device state to software state after all the
+ * state tracking consumers linked to this device (present at
+ * the time of late_initcall) have successfully bound to a
+ * driver. If the device has no consumers, this function will
+ * be called at late_initcall_sync level. If the device has
+ * consumers that are never bound to a driver, this function
+ * will never get called until they do.
* @remove: Called when a device removed from this bus.
* @shutdown: Called at shut-down time to quiesce the device.
*
int (*match)(struct device *dev, struct device_driver *drv);
int (*uevent)(struct device *dev, struct kobj_uevent_env *env);
int (*probe)(struct device *dev);
+ void (*sync_state)(struct device *dev);
int (*remove)(struct device *dev);
void (*shutdown)(struct device *dev);
* @probe: Called to query the existence of a specific device,
* whether this driver can work with it, and bind the driver
* to a specific device.
+ * @sync_state: Called to sync device state to software state after all the
+ * state tracking consumers linked to this device (present at
+ * the time of late_initcall) have successfully bound to a
+ * driver. If the device has no consumers, this function will
+ * be called at late_initcall_sync level. If the device has
+ * consumers that are never bound to a driver, this function
+ * will never get called until they do.
* @remove: Called when the device is removed from the system to
* unbind a device from this driver.
* @shutdown: Called at shut-down time to quiesce the device.
const struct acpi_device_id *acpi_match_table;
int (*probe) (struct device *dev);
+ void (*sync_state)(struct device *dev);
int (*remove) (struct device *dev);
void (*shutdown) (struct device *dev);
int (*suspend) (struct device *dev, pm_message_t state);
void __iomem *devm_ioremap_resource(struct device *dev,
const struct resource *res);
+void __iomem *devm_ioremap_resource_wc(struct device *dev,
+ const struct resource *res);
void __iomem *devm_of_iomap(struct device *dev,
struct device_node *node, int index,
* AUTOREMOVE_SUPPLIER: Remove the link automatically on supplier driver unbind.
* AUTOPROBE_CONSUMER: Probe consumer driver automatically after supplier binds.
* MANAGED: The core tracks presence of supplier/consumer drivers (internal).
+ * SYNC_STATE_ONLY: Link only affects sync_state() behavior.
*/
#define DL_FLAG_STATELESS BIT(0)
#define DL_FLAG_AUTOREMOVE_CONSUMER BIT(1)
#define DL_FLAG_AUTOREMOVE_SUPPLIER BIT(4)
#define DL_FLAG_AUTOPROBE_CONSUMER BIT(5)
#define DL_FLAG_MANAGED BIT(6)
+#define DL_FLAG_SYNC_STATE_ONLY BIT(7)
/**
* struct device_link - Device link representation.
* struct dev_links_info - Device data related to device links.
* @suppliers: List of links to supplier devices.
* @consumers: List of links to consumer devices.
+ * @needs_suppliers: Hook to global list of devices waiting for suppliers.
+ * @defer_sync: Hook to global list of devices that have deferred sync_state.
+ * @need_for_probe: If needs_suppliers is on a list, this indicates if the
+ * suppliers are needed for probe or not.
* @status: Driver status information.
*/
struct dev_links_info {
struct list_head suppliers;
struct list_head consumers;
+ struct list_head needs_suppliers;
+ struct list_head defer_sync;
+ bool need_for_probe;
enum dl_dev_state status;
};
* @offline: Set after successful invocation of bus type's .offline().
* @of_node_reused: Set if the device-tree node is shared with an ancestor
* device.
+ * @state_synced: The hardware state of this device has been synced to match
+ * the software state of this device by calling the driver/bus
+ * sync_state() callback.
* @dma_coherent: this particular device is dma coherent, even if the
* architecture supports non-coherent devices.
*
bool offline_disabled:1;
bool offline:1;
bool of_node_reused:1;
+ bool state_synced:1;
#if defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_DEVICE) || \
defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU) || \
defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL)
struct device *supplier, u32 flags);
void device_link_del(struct device_link *link);
void device_link_remove(void *consumer, struct device *supplier);
+void device_links_supplier_sync_state_pause(void);
+void device_links_supplier_sync_state_resume(void);
#ifndef dev_fmt
#define dev_fmt(fmt) fmt
struct fwnode_handle {
struct fwnode_handle *secondary;
const struct fwnode_operations *ops;
+ struct device *dev;
};
/**
* endpoint node.
* @graph_get_port_parent: Return the parent node of a port node.
* @graph_parse_endpoint: Parse endpoint for port and endpoint id.
+ * @add_links: Called after the device corresponding to the fwnode is added
+ * using device_add(). The function is expected to create device
+ * links to all the suppliers of the device that are available at
+ * the time this function is called. The function must NOT stop
+ * at the first failed device link if other unlinked supplier
+ * devices are present in the system. This is necessary for the
+ * driver/bus sync_state() callbacks to work correctly.
+ *
+ * For example, say Device-C depends on suppliers Device-S1 and
+ * Device-S2 and the dependency is listed in that order in the
+ * firmware. Say, S1 gets populated from the firmware after
+ * late_initcall_sync(). Say S2 is populated and probed way
+ * before that in device_initcall(). When C is populated, if this
+ * add_links() function doesn't continue past a "failed linking to
+ * S1" and continue linking C to S2, then S2 will get a
+ * sync_state() callback before C is probed. This is because from
+ * the perspective of S2, C was never a consumer when its
+ * sync_state() evaluation is done. To avoid this, the add_links()
+ * function has to go through all available suppliers of the
+ * device (that corresponds to this fwnode) and link to them
+ * before returning.
+ *
+ * If some suppliers are not yet available (indicated by an error
+ * return value), this function will be called again when other
+ * devices are added to allow creating device links to any newly
+ * available suppliers.
+ *
+ * Return 0 if device links have been successfully created to all
+ * the suppliers this device needs to create device links to or if
+ * the supplier information is not known.
+ *
+ * Return -ENODEV if and only if the suppliers needed for probing
+ * the device are not yet available to create device links to.
+ *
+ * Return -EAGAIN if there are suppliers that need to be linked to
+ * that are not yet available but none of those suppliers are
+ * necessary for probing this device.
*/
struct fwnode_operations {
struct fwnode_handle *(*get)(struct fwnode_handle *fwnode);
(*graph_get_port_parent)(struct fwnode_handle *fwnode);
int (*graph_parse_endpoint)(const struct fwnode_handle *fwnode,
struct fwnode_endpoint *endpoint);
+ int (*add_links)(const struct fwnode_handle *fwnode,
+ struct device *dev);
};
#define fwnode_has_op(fwnode, op) \
if (fwnode_has_op(fwnode, op)) \
(fwnode)->ops->op(fwnode, ## __VA_ARGS__); \
} while (false)
+#define get_dev_from_fwnode(fwnode) get_device((fwnode)->dev)
#endif
extern void __iomem *
devm_platform_ioremap_resource(struct platform_device *pdev,
unsigned int index);
+extern void __iomem *
+devm_platform_ioremap_resource_wc(struct platform_device *pdev,
+ unsigned int index);
+extern void __iomem *
+devm_platform_ioremap_resource_byname(struct platform_device *pdev,
+ const char *name);
extern int platform_get_irq(struct platform_device *, unsigned int);
extern int platform_get_irq_optional(struct platform_device *, unsigned int);
extern int platform_irq_count(struct platform_device *);
#define platform_register_drivers(drivers, count) \
__platform_register_drivers(drivers, count, THIS_MODULE)
-/* early platform driver interface */
-struct early_platform_driver {
- const char *class_str;
- struct platform_driver *pdrv;
- struct list_head list;
- int requested_id;
- char *buffer;
- int bufsize;
-};
-
-#define EARLY_PLATFORM_ID_UNSET -2
-#define EARLY_PLATFORM_ID_ERROR -3
-
-extern int early_platform_driver_register(struct early_platform_driver *epdrv,
- char *buf);
-extern void early_platform_add_devices(struct platform_device **devs, int num);
-
-static inline int is_early_platform_device(struct platform_device *pdev)
-{
- return !pdev->dev.driver;
-}
-
-extern void early_platform_driver_register_all(char *class_str);
-extern int early_platform_driver_probe(char *class_str,
- int nr_probe, int user_only);
-extern void early_platform_cleanup(void);
-
-#define early_platform_init(class_string, platdrv) \
- early_platform_init_buffer(class_string, platdrv, NULL, 0)
-
-#ifndef MODULE
-#define early_platform_init_buffer(class_string, platdrv, buf, bufsiz) \
-static __initdata struct early_platform_driver early_driver = { \
- .class_str = class_string, \
- .buffer = buf, \
- .bufsize = bufsiz, \
- .pdrv = platdrv, \
- .requested_id = EARLY_PLATFORM_ID_UNSET, \
-}; \
-static int __init early_platform_driver_setup_func(char *buffer) \
-{ \
- return early_platform_driver_register(&early_driver, buffer); \
-} \
-early_param(class_string, early_platform_driver_setup_func)
-#else /* MODULE */
-#define early_platform_init_buffer(class_string, platdrv, buf, bufsiz) \
-static inline char *early_platform_driver_setup_func(void) \
-{ \
- return bufsiz ? buf : NULL; \
-}
-#endif /* MODULE */
-
#ifdef CONFIG_SUSPEND
extern int platform_pm_suspend(struct device *dev);
extern int platform_pm_resume(struct device *dev);
#define USE_PLATFORM_PM_SLEEP_OPS
#endif
+#ifndef CONFIG_SUPERH
+/*
+ * REVISIT: This stub is needed for all non-SuperH users of early platform
+ * drivers. It should go away once we introduce the new platform_device-based
+ * early driver framework.
+ */
+static inline int is_sh_early_platform_device(struct platform_device *pdev)
+{
+ return 0;
+}
+#endif /* CONFIG_SUPERH */
+
#endif /* _PLATFORM_DEVICE_H_ */
const char *serial_number;
const char *soc_id;
const void *data;
+ const struct attribute_group *custom_attr_group;
};
/**
#define GPIOLINE_FLAG_ACTIVE_LOW (1UL << 2)
#define GPIOLINE_FLAG_OPEN_DRAIN (1UL << 3)
#define GPIOLINE_FLAG_OPEN_SOURCE (1UL << 4)
+#define GPIOLINE_FLAG_BIAS_PULL_UP (1UL << 5)
+#define GPIOLINE_FLAG_BIAS_PULL_DOWN (1UL << 6)
+#define GPIOLINE_FLAG_BIAS_DISABLE (1UL << 7)
/**
* struct gpioline_info - Information about a certain GPIO line
#define GPIOHANDLE_REQUEST_ACTIVE_LOW (1UL << 2)
#define GPIOHANDLE_REQUEST_OPEN_DRAIN (1UL << 3)
#define GPIOHANDLE_REQUEST_OPEN_SOURCE (1UL << 4)
+#define GPIOHANDLE_REQUEST_BIAS_PULL_UP (1UL << 5)
+#define GPIOHANDLE_REQUEST_BIAS_PULL_DOWN (1UL << 6)
+#define GPIOHANDLE_REQUEST_BIAS_DISABLE (1UL << 7)
/**
* struct gpiohandle_request - Information about a GPIO handle request
int fd;
};
+/**
+ * struct gpiohandle_config - Configuration for a GPIO handle request
+ * @flags: updated flags for the requested GPIO lines, such as
+ * GPIOHANDLE_REQUEST_OUTPUT, GPIOHANDLE_REQUEST_ACTIVE_LOW etc, OR:ed
+ * together
+ * @default_values: if the GPIOHANDLE_REQUEST_OUTPUT is set in flags,
+ * this specifies the default output value, should be 0 (low) or
+ * 1 (high), anything else than 0 or 1 will be interpreted as 1 (high)
+ * @padding: reserved for future use and should be zero filled
+ */
+struct gpiohandle_config {
+ __u32 flags;
+ __u8 default_values[GPIOHANDLES_MAX];
+ __u32 padding[4]; /* padding for future use */
+};
+
+#define GPIOHANDLE_SET_CONFIG_IOCTL _IOWR(0xB4, 0x0a, struct gpiohandle_config)
+
/**
* struct gpiohandle_data - Information of values on a GPIO handle
* @values: when getting the state of lines this contains the current
}
EXPORT_SYMBOL(devm_iounmap);
-/**
- * devm_ioremap_resource() - check, request region, and ioremap resource
- * @dev: generic device to handle the resource for
- * @res: resource to be handled
- *
- * Checks that a resource is a valid memory region, requests the memory
- * region and ioremaps it. All operations are managed and will be undone
- * on driver detach.
- *
- * Returns a pointer to the remapped memory or an ERR_PTR() encoded error code
- * on failure. Usage example:
- *
- * res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- * base = devm_ioremap_resource(&pdev->dev, res);
- * if (IS_ERR(base))
- * return PTR_ERR(base);
- */
-void __iomem *devm_ioremap_resource(struct device *dev,
- const struct resource *res)
+static void __iomem *
+__devm_ioremap_resource(struct device *dev, const struct resource *res,
+ enum devm_ioremap_type type)
{
resource_size_t size;
void __iomem *dest_ptr;
return IOMEM_ERR_PTR(-EBUSY);
}
- dest_ptr = devm_ioremap(dev, res->start, size);
+ dest_ptr = __devm_ioremap(dev, res->start, size, type);
if (!dest_ptr) {
dev_err(dev, "ioremap failed for resource %pR\n", res);
devm_release_mem_region(dev, res->start, size);
return dest_ptr;
}
+
+/**
+ * devm_ioremap_resource() - check, request region, and ioremap resource
+ * @dev: generic device to handle the resource for
+ * @res: resource to be handled
+ *
+ * Checks that a resource is a valid memory region, requests the memory
+ * region and ioremaps it. All operations are managed and will be undone
+ * on driver detach.
+ *
+ * Returns a pointer to the remapped memory or an ERR_PTR() encoded error code
+ * on failure. Usage example:
+ *
+ * res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ * base = devm_ioremap_resource(&pdev->dev, res);
+ * if (IS_ERR(base))
+ * return PTR_ERR(base);
+ */
+void __iomem *devm_ioremap_resource(struct device *dev,
+ const struct resource *res)
+{
+ return __devm_ioremap_resource(dev, res, DEVM_IOREMAP);
+}
EXPORT_SYMBOL(devm_ioremap_resource);
+/**
+ * devm_ioremap_resource_wc() - write-combined variant of
+ * devm_ioremap_resource()
+ * @dev: generic device to handle the resource for
+ * @res: resource to be handled
+ *
+ * Returns a pointer to the remapped memory or an ERR_PTR() encoded error code
+ * on failure. Usage example:
+ */
+void __iomem *devm_ioremap_resource_wc(struct device *dev,
+ const struct resource *res)
+{
+ return __devm_ioremap_resource(dev, res, DEVM_IOREMAP_WC);
+}
+
/*
* devm_of_iomap - Requests a resource and maps the memory mapped IO
* for a given device_node managed by a given device
sta->debugfs_dir, sta, &sta_ ##name## _ops);
#define DEBUGFS_ADD_COUNTER(name, field) \
- if (sizeof(sta->field) == sizeof(u32)) \
- debugfs_create_u32(#name, 0400, sta->debugfs_dir, \
- (u32 *) &sta->field); \
- else \
- debugfs_create_u64(#name, 0400, sta->debugfs_dir, \
- (u64 *) &sta->field);
+ debugfs_create_ulong(#name, 0400, sta->debugfs_dir, &sta->field);
void ieee80211_sta_debugfs_add(struct sta_info *sta)
{
NL80211_EXT_FEATURE_AIRTIME_FAIRNESS))
DEBUGFS_ADD(airtime);
- if (sizeof(sta->driver_buffered_tids) == sizeof(u32))
- debugfs_create_x32("driver_buffered_tids", 0400,
- sta->debugfs_dir,
- (u32 *)&sta->driver_buffered_tids);
- else
- debugfs_create_x64("driver_buffered_tids", 0400,
- sta->debugfs_dir,
- (u64 *)&sta->driver_buffered_tids);
+ debugfs_create_xul("driver_buffered_tids", 0400, sta->debugfs_dir,
+ &sta->driver_buffered_tids);
drv_sta_add_debugfs(local, sdata, &sta->sta, sta->debugfs_dir);
}
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