#include <linux/fs.h>
#include <linux/i2c.h>
#include <linux/jiffies.h>
+#include <linux/leds.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/pmbus.h>
#define CFFPS_CCIN_CMD 0xBD
#define CFFPS_FW_CMD_START 0xFA
#define CFFPS_FW_NUM_BYTES 4
+#define CFFPS_SYS_CONFIG_CMD 0xDA
#define CFFPS_INPUT_HISTORY_CMD 0xD6
#define CFFPS_INPUT_HISTORY_SIZE 100
#define CFFPS_MFR_VAUX_FAULT BIT(6)
#define CFFPS_MFR_CURRENT_SHARE_WARNING BIT(7)
+#define CFFPS_LED_BLINK BIT(0)
+#define CFFPS_LED_ON BIT(1)
+#define CFFPS_LED_OFF BIT(2)
+#define CFFPS_BLINK_RATE_MS 250
+
enum {
CFFPS_DEBUGFS_INPUT_HISTORY = 0,
CFFPS_DEBUGFS_FRU,
struct ibm_cffps_input_history input_history;
int debugfs_entries[CFFPS_DEBUGFS_NUM_ENTRIES];
+
+ char led_name[32];
+ u8 led_state;
+ struct led_classdev led;
};
#define to_psu(x, y) container_of((x), struct ibm_cffps, debugfs_entries[(y)])
return rc;
}
+static void ibm_cffps_led_brightness_set(struct led_classdev *led_cdev,
+ enum led_brightness brightness)
+{
+ int rc;
+ struct ibm_cffps *psu = container_of(led_cdev, struct ibm_cffps, led);
+
+ if (brightness == LED_OFF) {
+ psu->led_state = CFFPS_LED_OFF;
+ } else {
+ brightness = LED_FULL;
+ if (psu->led_state != CFFPS_LED_BLINK)
+ psu->led_state = CFFPS_LED_ON;
+ }
+
+ rc = i2c_smbus_write_byte_data(psu->client, CFFPS_SYS_CONFIG_CMD,
+ psu->led_state);
+ if (rc < 0)
+ return;
+
+ led_cdev->brightness = brightness;
+}
+
+static int ibm_cffps_led_blink_set(struct led_classdev *led_cdev,
+ unsigned long *delay_on,
+ unsigned long *delay_off)
+{
+ int rc;
+ struct ibm_cffps *psu = container_of(led_cdev, struct ibm_cffps, led);
+
+ psu->led_state = CFFPS_LED_BLINK;
+
+ if (led_cdev->brightness == LED_OFF)
+ return 0;
+
+ rc = i2c_smbus_write_byte_data(psu->client, CFFPS_SYS_CONFIG_CMD,
+ CFFPS_LED_BLINK);
+ if (rc < 0)
+ return rc;
+
+ *delay_on = CFFPS_BLINK_RATE_MS;
+ *delay_off = CFFPS_BLINK_RATE_MS;
+
+ return 0;
+}
+
+static void ibm_cffps_create_led_class(struct ibm_cffps *psu)
+{
+ int rc;
+ struct i2c_client *client = psu->client;
+ struct device *dev = &client->dev;
+
+ snprintf(psu->led_name, sizeof(psu->led_name), "%s-%02x", client->name,
+ client->addr);
+ psu->led.name = psu->led_name;
+ psu->led.max_brightness = LED_FULL;
+ psu->led.brightness_set = ibm_cffps_led_brightness_set;
+ psu->led.blink_set = ibm_cffps_led_blink_set;
+
+ rc = devm_led_classdev_register(dev, &psu->led);
+ if (rc)
+ dev_warn(dev, "failed to register led class: %d\n", rc);
+}
+
static struct pmbus_driver_info ibm_cffps_info = {
.pages = 1,
.func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT |
if (rc)
return rc;
+ /*
+ * Don't fail the probe if there isn't enough memory for leds and
+ * debugfs.
+ */
+ psu = devm_kzalloc(&client->dev, sizeof(*psu), GFP_KERNEL);
+ if (!psu)
+ return 0;
+
+ psu->client = client;
+ mutex_init(&psu->input_history.update_lock);
+ psu->input_history.last_update = jiffies - HZ;
+
+ ibm_cffps_create_led_class(psu);
+
/* Don't fail the probe if we can't create debugfs */
debugfs = pmbus_get_debugfs_dir(client);
if (!debugfs)
if (!ibm_cffps_dir)
return 0;
- psu = devm_kzalloc(&client->dev, sizeof(*psu), GFP_KERNEL);
- if (!psu)
- return 0;
-
- psu->client = client;
- mutex_init(&psu->input_history.update_lock);
- psu->input_history.last_update = jiffies - HZ;
-
for (i = 0; i < CFFPS_DEBUGFS_NUM_ENTRIES; ++i)
psu->debugfs_entries[i] = i;