--- /dev/null
+/*
+ * Oxford Semiconductor OXNAS SoC Family pinctrl driver
+ *
+ * Copyright (C) 2016 Neil Armstrong <narmstrong@baylibre.com>
+ *
+ * Based on pinctrl-pic32.c
+ * Joshua Henderson, <joshua.henderson@microchip.com>
+ * Copyright (C) 2015 Microchip Technology Inc. All rights reserved.
+ *
+ * This program is free software; you can distribute it and/or modify it
+ * under the terms of the GNU General Public License (Version 2) as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+#include <linux/gpio/driver.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinconf-generic.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/regmap.h>
+#include <linux/mfd/syscon.h>
+
+#include "pinctrl-utils.h"
+
+#define PINS_PER_BANK 32
+
+#define GPIO_BANK_START(bank) ((bank) * PINS_PER_BANK)
+
+/* Regmap Offsets */
+#define PINMUX_PRIMARY_SEL0 0x0c
+#define PINMUX_SECONDARY_SEL0 0x14
+#define PINMUX_TERTIARY_SEL0 0x8c
+#define PINMUX_PRIMARY_SEL1 0x10
+#define PINMUX_SECONDARY_SEL1 0x18
+#define PINMUX_TERTIARY_SEL1 0x90
+#define PINMUX_PULLUP_CTRL0 0xac
+#define PINMUX_PULLUP_CTRL1 0xb0
+
+/* GPIO Registers */
+#define INPUT_VALUE 0x00
+#define IRQ_PENDING 0x0c
+#define OUTPUT_SET 0x14
+#define OUTPUT_CLEAR 0x18
+#define OUTPUT_EN_SET 0x1c
+#define OUTPUT_EN_CLEAR 0x20
+#define RE_IRQ_ENABLE 0x28
+#define FE_IRQ_ENABLE 0x2c
+
+struct oxnas_function {
+ const char *name;
+ const char * const *groups;
+ unsigned int ngroups;
+};
+
+struct oxnas_pin_group {
+ const char *name;
+ unsigned int pin;
+ unsigned int bank;
+ struct oxnas_desc_function *functions;
+};
+
+struct oxnas_desc_function {
+ const char *name;
+ unsigned int fct;
+};
+
+struct oxnas_gpio_bank {
+ void __iomem *reg_base;
+ struct gpio_chip gpio_chip;
+ struct irq_chip irq_chip;
+ unsigned int id;
+};
+
+struct oxnas_pinctrl {
+ struct regmap *regmap;
+ struct device *dev;
+ struct pinctrl_dev *pctldev;
+ const struct pinctrl_pin_desc *pins;
+ unsigned int npins;
+ const struct oxnas_function *functions;
+ unsigned int nfunctions;
+ const struct oxnas_pin_group *groups;
+ unsigned int ngroups;
+ struct oxnas_gpio_bank *gpio_banks;
+ unsigned int nbanks;
+};
+
+static const struct pinctrl_pin_desc oxnas_pins[] = {
+ PINCTRL_PIN(0, "gpio0"),
+ PINCTRL_PIN(1, "gpio1"),
+ PINCTRL_PIN(2, "gpio2"),
+ PINCTRL_PIN(3, "gpio3"),
+ PINCTRL_PIN(4, "gpio4"),
+ PINCTRL_PIN(5, "gpio5"),
+ PINCTRL_PIN(6, "gpio6"),
+ PINCTRL_PIN(7, "gpio7"),
+ PINCTRL_PIN(8, "gpio8"),
+ PINCTRL_PIN(9, "gpio9"),
+ PINCTRL_PIN(10, "gpio10"),
+ PINCTRL_PIN(11, "gpio11"),
+ PINCTRL_PIN(12, "gpio12"),
+ PINCTRL_PIN(13, "gpio13"),
+ PINCTRL_PIN(14, "gpio14"),
+ PINCTRL_PIN(15, "gpio15"),
+ PINCTRL_PIN(16, "gpio16"),
+ PINCTRL_PIN(17, "gpio17"),
+ PINCTRL_PIN(18, "gpio18"),
+ PINCTRL_PIN(19, "gpio19"),
+ PINCTRL_PIN(20, "gpio20"),
+ PINCTRL_PIN(21, "gpio21"),
+ PINCTRL_PIN(22, "gpio22"),
+ PINCTRL_PIN(23, "gpio23"),
+ PINCTRL_PIN(24, "gpio24"),
+ PINCTRL_PIN(25, "gpio25"),
+ PINCTRL_PIN(26, "gpio26"),
+ PINCTRL_PIN(27, "gpio27"),
+ PINCTRL_PIN(28, "gpio28"),
+ PINCTRL_PIN(29, "gpio29"),
+ PINCTRL_PIN(30, "gpio30"),
+ PINCTRL_PIN(31, "gpio31"),
+ PINCTRL_PIN(32, "gpio32"),
+ PINCTRL_PIN(33, "gpio33"),
+ PINCTRL_PIN(34, "gpio34"),
+};
+
+static const char * const oxnas_fct0_group[] = {
+ "gpio0", "gpio1", "gpio2", "gpio3",
+ "gpio4", "gpio5", "gpio6", "gpio7",
+ "gpio8", "gpio9", "gpio10", "gpio11",
+ "gpio12", "gpio13", "gpio14", "gpio15",
+ "gpio16", "gpio17", "gpio18", "gpio19",
+ "gpio20", "gpio21", "gpio22", "gpio23",
+ "gpio24", "gpio25", "gpio26", "gpio27",
+ "gpio28", "gpio29", "gpio30", "gpio31",
+ "gpio32", "gpio33", "gpio34"
+};
+
+static const char * const oxnas_fct3_group[] = {
+ "gpio0", "gpio1", "gpio2", "gpio3",
+ "gpio4", "gpio5", "gpio6", "gpio7",
+ "gpio8", "gpio9",
+ "gpio20",
+ "gpio22", "gpio23", "gpio24", "gpio25",
+ "gpio26", "gpio27", "gpio28", "gpio29",
+ "gpio30", "gpio31", "gpio32", "gpio33",
+ "gpio34"
+};
+
+#define FUNCTION(_name, _gr) \
+ { \
+ .name = #_name, \
+ .groups = oxnas_##_gr##_group, \
+ .ngroups = ARRAY_SIZE(oxnas_##_gr##_group), \
+ }
+
+static const struct oxnas_function oxnas_functions[] = {
+ FUNCTION(gpio, fct0),
+ FUNCTION(fct3, fct3),
+};
+
+#define OXNAS_PINCTRL_GROUP(_pin, _name, ...) \
+ { \
+ .name = #_name, \
+ .pin = _pin, \
+ .bank = _pin / PINS_PER_BANK, \
+ .functions = (struct oxnas_desc_function[]){ \
+ __VA_ARGS__, { } }, \
+ }
+
+#define OXNAS_PINCTRL_FUNCTION(_name, _fct) \
+ { \
+ .name = #_name, \
+ .fct = _fct, \
+ }
+
+static const struct oxnas_pin_group oxnas_groups[] = {
+ OXNAS_PINCTRL_GROUP(0, gpio0,
+ OXNAS_PINCTRL_FUNCTION(gpio, 0),
+ OXNAS_PINCTRL_FUNCTION(fct3, 3)),
+ OXNAS_PINCTRL_GROUP(1, gpio1,
+ OXNAS_PINCTRL_FUNCTION(gpio, 0),
+ OXNAS_PINCTRL_FUNCTION(fct3, 3)),
+ OXNAS_PINCTRL_GROUP(2, gpio2,
+ OXNAS_PINCTRL_FUNCTION(gpio, 0),
+ OXNAS_PINCTRL_FUNCTION(fct3, 3)),
+ OXNAS_PINCTRL_GROUP(3, gpio3,
+ OXNAS_PINCTRL_FUNCTION(gpio, 0),
+ OXNAS_PINCTRL_FUNCTION(fct3, 3)),
+ OXNAS_PINCTRL_GROUP(4, gpio4,
+ OXNAS_PINCTRL_FUNCTION(gpio, 0),
+ OXNAS_PINCTRL_FUNCTION(fct3, 3)),
+ OXNAS_PINCTRL_GROUP(5, gpio5,
+ OXNAS_PINCTRL_FUNCTION(gpio, 0),
+ OXNAS_PINCTRL_FUNCTION(fct3, 3)),
+ OXNAS_PINCTRL_GROUP(6, gpio6,
+ OXNAS_PINCTRL_FUNCTION(gpio, 0),
+ OXNAS_PINCTRL_FUNCTION(fct3, 3)),
+ OXNAS_PINCTRL_GROUP(7, gpio7,
+ OXNAS_PINCTRL_FUNCTION(gpio, 0),
+ OXNAS_PINCTRL_FUNCTION(fct3, 3)),
+ OXNAS_PINCTRL_GROUP(8, gpio8,
+ OXNAS_PINCTRL_FUNCTION(gpio, 0),
+ OXNAS_PINCTRL_FUNCTION(fct3, 3)),
+ OXNAS_PINCTRL_GROUP(9, gpio9,
+ OXNAS_PINCTRL_FUNCTION(gpio, 0),
+ OXNAS_PINCTRL_FUNCTION(fct3, 3)),
+ OXNAS_PINCTRL_GROUP(10, gpio10,
+ OXNAS_PINCTRL_FUNCTION(gpio, 0)),
+ OXNAS_PINCTRL_GROUP(11, gpio11,
+ OXNAS_PINCTRL_FUNCTION(gpio, 0)),
+ OXNAS_PINCTRL_GROUP(12, gpio12,
+ OXNAS_PINCTRL_FUNCTION(gpio, 0)),
+ OXNAS_PINCTRL_GROUP(13, gpio13,
+ OXNAS_PINCTRL_FUNCTION(gpio, 0)),
+ OXNAS_PINCTRL_GROUP(14, gpio14,
+ OXNAS_PINCTRL_FUNCTION(gpio, 0)),
+ OXNAS_PINCTRL_GROUP(15, gpio15,
+ OXNAS_PINCTRL_FUNCTION(gpio, 0)),
+ OXNAS_PINCTRL_GROUP(16, gpio16,
+ OXNAS_PINCTRL_FUNCTION(gpio, 0)),
+ OXNAS_PINCTRL_GROUP(17, gpio17,
+ OXNAS_PINCTRL_FUNCTION(gpio, 0)),
+ OXNAS_PINCTRL_GROUP(18, gpio18,
+ OXNAS_PINCTRL_FUNCTION(gpio, 0)),
+ OXNAS_PINCTRL_GROUP(19, gpio19,
+ OXNAS_PINCTRL_FUNCTION(gpio, 0)),
+ OXNAS_PINCTRL_GROUP(20, gpio20,
+ OXNAS_PINCTRL_FUNCTION(gpio, 0),
+ OXNAS_PINCTRL_FUNCTION(fct3, 3)),
+ OXNAS_PINCTRL_GROUP(21, gpio21,
+ OXNAS_PINCTRL_FUNCTION(gpio, 0)),
+ OXNAS_PINCTRL_GROUP(22, gpio22,
+ OXNAS_PINCTRL_FUNCTION(gpio, 0),
+ OXNAS_PINCTRL_FUNCTION(fct3, 3)),
+ OXNAS_PINCTRL_GROUP(23, gpio23,
+ OXNAS_PINCTRL_FUNCTION(gpio, 0),
+ OXNAS_PINCTRL_FUNCTION(fct3, 3)),
+ OXNAS_PINCTRL_GROUP(24, gpio24,
+ OXNAS_PINCTRL_FUNCTION(gpio, 0),
+ OXNAS_PINCTRL_FUNCTION(fct3, 3)),
+ OXNAS_PINCTRL_GROUP(25, gpio25,
+ OXNAS_PINCTRL_FUNCTION(gpio, 0),
+ OXNAS_PINCTRL_FUNCTION(fct3, 3)),
+ OXNAS_PINCTRL_GROUP(26, gpio26,
+ OXNAS_PINCTRL_FUNCTION(gpio, 0),
+ OXNAS_PINCTRL_FUNCTION(fct3, 3)),
+ OXNAS_PINCTRL_GROUP(27, gpio27,
+ OXNAS_PINCTRL_FUNCTION(gpio, 0),
+ OXNAS_PINCTRL_FUNCTION(fct3, 3)),
+ OXNAS_PINCTRL_GROUP(28, gpio28,
+ OXNAS_PINCTRL_FUNCTION(gpio, 0),
+ OXNAS_PINCTRL_FUNCTION(fct3, 3)),
+ OXNAS_PINCTRL_GROUP(29, gpio29,
+ OXNAS_PINCTRL_FUNCTION(gpio, 0),
+ OXNAS_PINCTRL_FUNCTION(fct3, 3)),
+ OXNAS_PINCTRL_GROUP(30, gpio30,
+ OXNAS_PINCTRL_FUNCTION(gpio, 0),
+ OXNAS_PINCTRL_FUNCTION(fct3, 3)),
+ OXNAS_PINCTRL_GROUP(31, gpio31,
+ OXNAS_PINCTRL_FUNCTION(gpio, 0),
+ OXNAS_PINCTRL_FUNCTION(fct3, 3)),
+ OXNAS_PINCTRL_GROUP(32, gpio32,
+ OXNAS_PINCTRL_FUNCTION(gpio, 0),
+ OXNAS_PINCTRL_FUNCTION(fct3, 3)),
+ OXNAS_PINCTRL_GROUP(33, gpio33,
+ OXNAS_PINCTRL_FUNCTION(gpio, 0),
+ OXNAS_PINCTRL_FUNCTION(fct3, 3)),
+ OXNAS_PINCTRL_GROUP(34, gpio34,
+ OXNAS_PINCTRL_FUNCTION(gpio, 0),
+ OXNAS_PINCTRL_FUNCTION(fct3, 3)),
+};
+
+static inline struct oxnas_gpio_bank *pctl_to_bank(struct oxnas_pinctrl *pctl,
+ unsigned int pin)
+{
+ return &pctl->gpio_banks[pin / PINS_PER_BANK];
+}
+
+static int oxnas_pinctrl_get_groups_count(struct pinctrl_dev *pctldev)
+{
+ struct oxnas_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+
+ return pctl->ngroups;
+}
+
+static const char *oxnas_pinctrl_get_group_name(struct pinctrl_dev *pctldev,
+ unsigned int group)
+{
+ struct oxnas_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+
+ return pctl->groups[group].name;
+}
+
+static int oxnas_pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
+ unsigned int group,
+ const unsigned int **pins,
+ unsigned int *num_pins)
+{
+ struct oxnas_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+
+ *pins = &pctl->groups[group].pin;
+ *num_pins = 1;
+
+ return 0;
+}
+
+static const struct pinctrl_ops oxnas_pinctrl_ops = {
+ .get_groups_count = oxnas_pinctrl_get_groups_count,
+ .get_group_name = oxnas_pinctrl_get_group_name,
+ .get_group_pins = oxnas_pinctrl_get_group_pins,
+ .dt_node_to_map = pinconf_generic_dt_node_to_map_pin,
+ .dt_free_map = pinctrl_utils_dt_free_map,
+};
+
+static int oxnas_pinmux_get_functions_count(struct pinctrl_dev *pctldev)
+{
+ struct oxnas_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+
+ return pctl->nfunctions;
+}
+
+static const char *
+oxnas_pinmux_get_function_name(struct pinctrl_dev *pctldev, unsigned int func)
+{
+ struct oxnas_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+
+ return pctl->functions[func].name;
+}
+
+static int oxnas_pinmux_get_function_groups(struct pinctrl_dev *pctldev,
+ unsigned int func,
+ const char * const **groups,
+ unsigned int * const num_groups)
+{
+ struct oxnas_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+
+ *groups = pctl->functions[func].groups;
+ *num_groups = pctl->functions[func].ngroups;
+
+ return 0;
+}
+
+static int oxnas_pinmux_enable(struct pinctrl_dev *pctldev,
+ unsigned int func, unsigned int group)
+{
+ struct oxnas_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+ const struct oxnas_pin_group *pg = &pctl->groups[group];
+ const struct oxnas_function *pf = &pctl->functions[func];
+ const char *fname = pf->name;
+ struct oxnas_desc_function *functions = pg->functions;
+ u32 mask = BIT(pg->pin);
+
+ while (functions->name) {
+ if (!strcmp(functions->name, fname)) {
+ dev_dbg(pctl->dev,
+ "setting function %s bank %d pin %d fct %d mask %x\n",
+ fname, pg->bank, pg->pin,
+ functions->fct, mask);
+
+ regmap_write_bits(pctl->regmap,
+ (pg->bank ?
+ PINMUX_PRIMARY_SEL1 :
+ PINMUX_PRIMARY_SEL0),
+ mask,
+ (functions->fct == 1 ?
+ mask : 0));
+ regmap_write_bits(pctl->regmap,
+ (pg->bank ?
+ PINMUX_SECONDARY_SEL1 :
+ PINMUX_SECONDARY_SEL0),
+ mask,
+ (functions->fct == 2 ?
+ mask : 0));
+ regmap_write_bits(pctl->regmap,
+ (pg->bank ?
+ PINMUX_TERTIARY_SEL1 :
+ PINMUX_TERTIARY_SEL0),
+ mask,
+ (functions->fct == 3 ?
+ mask : 0));
+
+ return 0;
+ }
+
+ functions++;
+ }
+
+ dev_err(pctl->dev, "cannot mux pin %u to function %u\n", group, func);
+
+ return -EINVAL;
+}
+
+static int oxnas_gpio_request_enable(struct pinctrl_dev *pctldev,
+ struct pinctrl_gpio_range *range,
+ unsigned int offset)
+{
+ struct oxnas_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+ struct oxnas_gpio_bank *bank = gpiochip_get_data(range->gc);
+ u32 mask = BIT(offset - bank->gpio_chip.base);
+
+ dev_dbg(pctl->dev, "requesting gpio %d in bank %d (id %d) with mask 0x%x\n",
+ offset, bank->gpio_chip.base, bank->id, mask);
+
+ regmap_write_bits(pctl->regmap,
+ (bank->id ?
+ PINMUX_PRIMARY_SEL1 :
+ PINMUX_PRIMARY_SEL0),
+ mask, 0);
+ regmap_write_bits(pctl->regmap,
+ (bank->id ?
+ PINMUX_SECONDARY_SEL1 :
+ PINMUX_SECONDARY_SEL0),
+ mask, 0);
+ regmap_write_bits(pctl->regmap,
+ (bank->id ?
+ PINMUX_TERTIARY_SEL1 :
+ PINMUX_TERTIARY_SEL0),
+ mask, 0);
+
+ return 0;
+}
+
+static int oxnas_gpio_direction_input(struct gpio_chip *chip,
+ unsigned int offset)
+{
+ struct oxnas_gpio_bank *bank = gpiochip_get_data(chip);
+ u32 mask = BIT(offset);
+
+ writel_relaxed(mask, bank->reg_base + OUTPUT_EN_CLEAR);
+
+ return 0;
+}
+
+static int oxnas_gpio_get(struct gpio_chip *chip, unsigned int offset)
+{
+ struct oxnas_gpio_bank *bank = gpiochip_get_data(chip);
+ u32 mask = BIT(offset);
+
+ return (readl_relaxed(bank->reg_base + INPUT_VALUE) & mask) != 0;
+}
+
+static void oxnas_gpio_set(struct gpio_chip *chip, unsigned int offset,
+ int value)
+{
+ struct oxnas_gpio_bank *bank = gpiochip_get_data(chip);
+ u32 mask = BIT(offset);
+
+ if (value)
+ writel_relaxed(mask, bank->reg_base + OUTPUT_SET);
+ else
+ writel_relaxed(mask, bank->reg_base + OUTPUT_CLEAR);
+}
+
+static int oxnas_gpio_direction_output(struct gpio_chip *chip,
+ unsigned int offset, int value)
+{
+ struct oxnas_gpio_bank *bank = gpiochip_get_data(chip);
+ u32 mask = BIT(offset);
+
+ oxnas_gpio_set(chip, offset, value);
+ writel_relaxed(mask, bank->reg_base + OUTPUT_EN_SET);
+
+ return 0;
+}
+
+static int oxnas_gpio_set_direction(struct pinctrl_dev *pctldev,
+ struct pinctrl_gpio_range *range,
+ unsigned int offset, bool input)
+{
+ struct gpio_chip *chip = range->gc;
+
+ if (input)
+ oxnas_gpio_direction_input(chip, offset);
+ else
+ oxnas_gpio_direction_output(chip, offset, 0);
+
+ return 0;
+}
+
+static const struct pinmux_ops oxnas_pinmux_ops = {
+ .get_functions_count = oxnas_pinmux_get_functions_count,
+ .get_function_name = oxnas_pinmux_get_function_name,
+ .get_function_groups = oxnas_pinmux_get_function_groups,
+ .set_mux = oxnas_pinmux_enable,
+ .gpio_request_enable = oxnas_gpio_request_enable,
+ .gpio_set_direction = oxnas_gpio_set_direction,
+};
+
+static int oxnas_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin,
+ unsigned long *config)
+{
+ struct oxnas_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+ struct oxnas_gpio_bank *bank = pctl_to_bank(pctl, pin);
+ unsigned int param = pinconf_to_config_param(*config);
+ u32 mask = BIT(pin - bank->gpio_chip.base);
+ int ret;
+ u32 arg;
+
+ switch (param) {
+ case PIN_CONFIG_BIAS_PULL_UP:
+ ret = regmap_read(pctl->regmap,
+ (bank->id ?
+ PINMUX_PULLUP_CTRL1 :
+ PINMUX_PULLUP_CTRL0),
+ &arg);
+ if (ret)
+ return ret;
+
+ arg = !!(arg & mask);
+ break;
+ default:
+ return -ENOTSUPP;
+ }
+
+ *config = pinconf_to_config_packed(param, arg);
+
+ return 0;
+}
+
+static int oxnas_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
+ unsigned long *configs, unsigned int num_configs)
+{
+ struct oxnas_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+ struct oxnas_gpio_bank *bank = pctl_to_bank(pctl, pin);
+ unsigned int param;
+ u32 arg;
+ unsigned int i;
+ u32 offset = pin - bank->gpio_chip.base;
+ u32 mask = BIT(offset);
+
+ dev_dbg(pctl->dev, "setting pin %d bank %d mask 0x%x\n",
+ pin, bank->gpio_chip.base, mask);
+
+ for (i = 0; i < num_configs; i++) {
+ param = pinconf_to_config_param(configs[i]);
+ arg = pinconf_to_config_argument(configs[i]);
+
+ switch (param) {
+ case PIN_CONFIG_BIAS_PULL_UP:
+ dev_dbg(pctl->dev, " pullup\n");
+ regmap_write_bits(pctl->regmap,
+ (bank->id ?
+ PINMUX_PULLUP_CTRL1 :
+ PINMUX_PULLUP_CTRL0),
+ mask, mask);
+ break;
+ default:
+ dev_err(pctl->dev, "Property %u not supported\n",
+ param);
+ return -ENOTSUPP;
+ }
+ }
+
+ return 0;
+}
+
+static const struct pinconf_ops oxnas_pinconf_ops = {
+ .pin_config_get = oxnas_pinconf_get,
+ .pin_config_set = oxnas_pinconf_set,
+ .is_generic = true,
+};
+
+static struct pinctrl_desc oxnas_pinctrl_desc = {
+ .name = "oxnas-pinctrl",
+ .pctlops = &oxnas_pinctrl_ops,
+ .pmxops = &oxnas_pinmux_ops,
+ .confops = &oxnas_pinconf_ops,
+ .owner = THIS_MODULE,
+};
+
+static void oxnas_gpio_irq_ack(struct irq_data *data)
+{
+ struct gpio_chip *chip = irq_data_get_irq_chip_data(data);
+ struct oxnas_gpio_bank *bank = gpiochip_get_data(chip);
+ u32 mask = BIT(data->hwirq);
+
+ writel(mask, bank->reg_base + IRQ_PENDING);
+}
+
+static void oxnas_gpio_irq_mask(struct irq_data *data)
+{
+ struct gpio_chip *chip = irq_data_get_irq_chip_data(data);
+ struct oxnas_gpio_bank *bank = gpiochip_get_data(chip);
+ unsigned int type = irqd_get_trigger_type(data);
+ u32 mask = BIT(data->hwirq);
+
+ if (type & IRQ_TYPE_EDGE_RISING)
+ writel(readl(bank->reg_base + RE_IRQ_ENABLE) & ~mask,
+ bank->reg_base + RE_IRQ_ENABLE);
+
+ if (type & IRQ_TYPE_EDGE_FALLING)
+ writel(readl(bank->reg_base + FE_IRQ_ENABLE) & ~mask,
+ bank->reg_base + FE_IRQ_ENABLE);
+}
+
+static void oxnas_gpio_irq_unmask(struct irq_data *data)
+{
+ struct gpio_chip *chip = irq_data_get_irq_chip_data(data);
+ struct oxnas_gpio_bank *bank = gpiochip_get_data(chip);
+ unsigned int type = irqd_get_trigger_type(data);
+ u32 mask = BIT(data->hwirq);
+
+ if (type & IRQ_TYPE_EDGE_RISING)
+ writel(readl(bank->reg_base + RE_IRQ_ENABLE) | mask,
+ bank->reg_base + RE_IRQ_ENABLE);
+
+ if (type & IRQ_TYPE_EDGE_FALLING)
+ writel(readl(bank->reg_base + FE_IRQ_ENABLE) | mask,
+ bank->reg_base + FE_IRQ_ENABLE);
+}
+
+static unsigned int oxnas_gpio_irq_startup(struct irq_data *data)
+{
+ struct gpio_chip *chip = irq_data_get_irq_chip_data(data);
+
+ oxnas_gpio_direction_input(chip, data->hwirq);
+ oxnas_gpio_irq_unmask(data);
+
+ return 0;
+}
+
+static int oxnas_gpio_irq_set_type(struct irq_data *data, unsigned int type)
+{
+ if ((type & (IRQ_TYPE_EDGE_RISING|IRQ_TYPE_EDGE_FALLING)) == 0)
+ return -EINVAL;
+
+ irq_set_handler_locked(data, handle_edge_irq);
+
+ return 0;
+}
+
+static void oxnas_gpio_irq_handler(struct irq_desc *desc)
+{
+ struct gpio_chip *gc = irq_desc_get_handler_data(desc);
+ struct oxnas_gpio_bank *bank = gpiochip_get_data(gc);
+ struct irq_chip *chip = irq_desc_get_chip(desc);
+ unsigned long stat;
+ unsigned int pin;
+
+ chained_irq_enter(chip, desc);
+
+ stat = readl(bank->reg_base + IRQ_PENDING);
+
+ for_each_set_bit(pin, &stat, BITS_PER_LONG)
+ generic_handle_irq(irq_linear_revmap(gc->irqdomain, pin));
+
+ chained_irq_exit(chip, desc);
+}
+
+#define GPIO_BANK(_bank) \
+ { \
+ .gpio_chip = { \
+ .label = "GPIO" #_bank, \
+ .request = gpiochip_generic_request, \
+ .free = gpiochip_generic_free, \
+ .direction_input = oxnas_gpio_direction_input, \
+ .direction_output = oxnas_gpio_direction_output, \
+ .get = oxnas_gpio_get, \
+ .set = oxnas_gpio_set, \
+ .ngpio = PINS_PER_BANK, \
+ .base = GPIO_BANK_START(_bank), \
+ .owner = THIS_MODULE, \
+ .can_sleep = 0, \
+ }, \
+ .irq_chip = { \
+ .name = "GPIO" #_bank, \
+ .irq_startup = oxnas_gpio_irq_startup, \
+ .irq_ack = oxnas_gpio_irq_ack, \
+ .irq_mask = oxnas_gpio_irq_mask, \
+ .irq_unmask = oxnas_gpio_irq_unmask, \
+ .irq_set_type = oxnas_gpio_irq_set_type, \
+ }, \
+ }
+
+static struct oxnas_gpio_bank oxnas_gpio_banks[] = {
+ GPIO_BANK(0),
+ GPIO_BANK(1),
+};
+
+static int oxnas_pinctrl_probe(struct platform_device *pdev)
+{
+ struct oxnas_pinctrl *pctl;
+
+ pctl = devm_kzalloc(&pdev->dev, sizeof(*pctl), GFP_KERNEL);
+ if (!pctl)
+ return -ENOMEM;
+ pctl->dev = &pdev->dev;
+ dev_set_drvdata(&pdev->dev, pctl);
+
+ pctl->regmap = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
+ "oxsemi,sys-ctrl");
+ if (IS_ERR(pctl->regmap)) {
+ dev_err(&pdev->dev, "failed to get sys ctrl regmap\n");
+ return -ENODEV;
+ }
+
+ pctl->pins = oxnas_pins;
+ pctl->npins = ARRAY_SIZE(oxnas_pins);
+ pctl->functions = oxnas_functions;
+ pctl->nfunctions = ARRAY_SIZE(oxnas_functions);
+ pctl->groups = oxnas_groups;
+ pctl->ngroups = ARRAY_SIZE(oxnas_groups);
+ pctl->gpio_banks = oxnas_gpio_banks;
+ pctl->nbanks = ARRAY_SIZE(oxnas_gpio_banks);
+
+ oxnas_pinctrl_desc.pins = pctl->pins;
+ oxnas_pinctrl_desc.npins = pctl->npins;
+
+ pctl->pctldev = pinctrl_register(&oxnas_pinctrl_desc,
+ &pdev->dev, pctl);
+ if (IS_ERR(pctl->pctldev)) {
+ dev_err(&pdev->dev, "Failed to register pinctrl device\n");
+ return PTR_ERR(pctl->pctldev);
+ }
+
+ return 0;
+}
+
+static int oxnas_gpio_probe(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct of_phandle_args pinspec;
+ struct oxnas_gpio_bank *bank;
+ unsigned int id, ngpios;
+ int irq, ret;
+ struct resource *res;
+
+ if (of_parse_phandle_with_fixed_args(np, "gpio-ranges",
+ 3, 0, &pinspec)) {
+ dev_err(&pdev->dev, "gpio-ranges property not found\n");
+ return -EINVAL;
+ }
+
+ id = pinspec.args[1] / PINS_PER_BANK;
+ ngpios = pinspec.args[2];
+
+ if (id >= ARRAY_SIZE(oxnas_gpio_banks)) {
+ dev_err(&pdev->dev, "invalid gpio-ranges base arg\n");
+ return -EINVAL;
+ }
+
+ if (ngpios > PINS_PER_BANK) {
+ dev_err(&pdev->dev, "invalid gpio-ranges count arg\n");
+ return -EINVAL;
+ }
+
+ bank = &oxnas_gpio_banks[id];
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ bank->reg_base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(bank->reg_base))
+ return PTR_ERR(bank->reg_base);
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ dev_err(&pdev->dev, "irq get failed\n");
+ return irq;
+ }
+
+ bank->id = id;
+ bank->gpio_chip.parent = &pdev->dev;
+ bank->gpio_chip.of_node = np;
+ bank->gpio_chip.ngpio = ngpios;
+ ret = gpiochip_add_data(&bank->gpio_chip, bank);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Failed to add GPIO chip %u: %d\n",
+ id, ret);
+ return ret;
+ }
+
+ ret = gpiochip_irqchip_add(&bank->gpio_chip, &bank->irq_chip,
+ 0, handle_level_irq, IRQ_TYPE_NONE);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Failed to add IRQ chip %u: %d\n",
+ id, ret);
+ gpiochip_remove(&bank->gpio_chip);
+ return ret;
+ }
+
+ gpiochip_set_chained_irqchip(&bank->gpio_chip, &bank->irq_chip,
+ irq, oxnas_gpio_irq_handler);
+
+ return 0;
+}
+
+static const struct of_device_id oxnas_pinctrl_of_match[] = {
+ { .compatible = "oxsemi,ox810se-pinctrl", },
+ { },
+};
+
+static struct platform_driver oxnas_pinctrl_driver = {
+ .driver = {
+ .name = "oxnas-pinctrl",
+ .of_match_table = oxnas_pinctrl_of_match,
+ .suppress_bind_attrs = true,
+ },
+ .probe = oxnas_pinctrl_probe,
+};
+
+static const struct of_device_id oxnas_gpio_of_match[] = {
+ { .compatible = "oxsemi,ox810se-gpio", },
+ { },
+};
+
+static struct platform_driver oxnas_gpio_driver = {
+ .driver = {
+ .name = "oxnas-gpio",
+ .of_match_table = oxnas_gpio_of_match,
+ .suppress_bind_attrs = true,
+ },
+ .probe = oxnas_gpio_probe,
+};
+
+static int __init oxnas_gpio_register(void)
+{
+ return platform_driver_register(&oxnas_gpio_driver);
+}
+arch_initcall(oxnas_gpio_register);
+
+static int __init oxnas_pinctrl_register(void)
+{
+ return platform_driver_register(&oxnas_pinctrl_driver);
+}
+arch_initcall(oxnas_pinctrl_register);
projects / linux.git / commitdiff