summaryrefslogtreecommitdiffstats
path: root/drivers/pinctrl/stm32/pinctrl-stm32.c
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--drivers/pinctrl/stm32/pinctrl-stm32.c1720
1 files changed, 1720 insertions, 0 deletions
diff --git a/drivers/pinctrl/stm32/pinctrl-stm32.c b/drivers/pinctrl/stm32/pinctrl-stm32.c
new file mode 100644
index 000000000..e198233c1
--- /dev/null
+++ b/drivers/pinctrl/stm32/pinctrl-stm32.c
@@ -0,0 +1,1720 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) Maxime Coquelin 2015
+ * Copyright (C) STMicroelectronics 2017
+ * Author: Maxime Coquelin <mcoquelin.stm32@gmail.com>
+ *
+ * Heavily based on Mediatek's pinctrl driver
+ */
+#include <linux/clk.h>
+#include <linux/gpio/driver.h>
+#include <linux/hwspinlock.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/of_irq.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/pinctrl/machine.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/property.h>
+#include <linux/regmap.h>
+#include <linux/reset.h>
+#include <linux/slab.h>
+
+#include "../core.h"
+#include "../pinconf.h"
+#include "../pinctrl-utils.h"
+#include "pinctrl-stm32.h"
+
+#define STM32_GPIO_MODER 0x00
+#define STM32_GPIO_TYPER 0x04
+#define STM32_GPIO_SPEEDR 0x08
+#define STM32_GPIO_PUPDR 0x0c
+#define STM32_GPIO_IDR 0x10
+#define STM32_GPIO_ODR 0x14
+#define STM32_GPIO_BSRR 0x18
+#define STM32_GPIO_LCKR 0x1c
+#define STM32_GPIO_AFRL 0x20
+#define STM32_GPIO_AFRH 0x24
+#define STM32_GPIO_SECCFGR 0x30
+
+/* custom bitfield to backup pin status */
+#define STM32_GPIO_BKP_MODE_SHIFT 0
+#define STM32_GPIO_BKP_MODE_MASK GENMASK(1, 0)
+#define STM32_GPIO_BKP_ALT_SHIFT 2
+#define STM32_GPIO_BKP_ALT_MASK GENMASK(5, 2)
+#define STM32_GPIO_BKP_SPEED_SHIFT 6
+#define STM32_GPIO_BKP_SPEED_MASK GENMASK(7, 6)
+#define STM32_GPIO_BKP_PUPD_SHIFT 8
+#define STM32_GPIO_BKP_PUPD_MASK GENMASK(9, 8)
+#define STM32_GPIO_BKP_TYPE 10
+#define STM32_GPIO_BKP_VAL 11
+
+#define STM32_GPIO_PINS_PER_BANK 16
+#define STM32_GPIO_IRQ_LINE 16
+
+#define SYSCFG_IRQMUX_MASK GENMASK(3, 0)
+
+#define gpio_range_to_bank(chip) \
+ container_of(chip, struct stm32_gpio_bank, range)
+
+#define HWSPNLCK_TIMEOUT 1000 /* usec */
+
+static const char * const stm32_gpio_functions[] = {
+ "gpio", "af0", "af1",
+ "af2", "af3", "af4",
+ "af5", "af6", "af7",
+ "af8", "af9", "af10",
+ "af11", "af12", "af13",
+ "af14", "af15", "analog",
+};
+
+struct stm32_pinctrl_group {
+ const char *name;
+ unsigned long config;
+ unsigned pin;
+};
+
+struct stm32_gpio_bank {
+ void __iomem *base;
+ struct clk *clk;
+ struct reset_control *rstc;
+ spinlock_t lock;
+ struct gpio_chip gpio_chip;
+ struct pinctrl_gpio_range range;
+ struct fwnode_handle *fwnode;
+ struct irq_domain *domain;
+ u32 bank_nr;
+ u32 bank_ioport_nr;
+ u32 pin_backup[STM32_GPIO_PINS_PER_BANK];
+ u8 irq_type[STM32_GPIO_PINS_PER_BANK];
+ bool secure_control;
+};
+
+struct stm32_pinctrl {
+ struct device *dev;
+ struct pinctrl_dev *pctl_dev;
+ struct pinctrl_desc pctl_desc;
+ struct stm32_pinctrl_group *groups;
+ unsigned ngroups;
+ const char **grp_names;
+ struct stm32_gpio_bank *banks;
+ unsigned nbanks;
+ const struct stm32_pinctrl_match_data *match_data;
+ struct irq_domain *domain;
+ struct regmap *regmap;
+ struct regmap_field *irqmux[STM32_GPIO_PINS_PER_BANK];
+ struct hwspinlock *hwlock;
+ struct stm32_desc_pin *pins;
+ u32 npins;
+ u32 pkg;
+ u16 irqmux_map;
+ spinlock_t irqmux_lock;
+};
+
+static inline int stm32_gpio_pin(int gpio)
+{
+ return gpio % STM32_GPIO_PINS_PER_BANK;
+}
+
+static inline u32 stm32_gpio_get_mode(u32 function)
+{
+ switch (function) {
+ case STM32_PIN_GPIO:
+ return 0;
+ case STM32_PIN_AF(0) ... STM32_PIN_AF(15):
+ return 2;
+ case STM32_PIN_ANALOG:
+ return 3;
+ }
+
+ return 0;
+}
+
+static inline u32 stm32_gpio_get_alt(u32 function)
+{
+ switch (function) {
+ case STM32_PIN_GPIO:
+ return 0;
+ case STM32_PIN_AF(0) ... STM32_PIN_AF(15):
+ return function - 1;
+ case STM32_PIN_ANALOG:
+ return 0;
+ }
+
+ return 0;
+}
+
+static void stm32_gpio_backup_value(struct stm32_gpio_bank *bank,
+ u32 offset, u32 value)
+{
+ bank->pin_backup[offset] &= ~BIT(STM32_GPIO_BKP_VAL);
+ bank->pin_backup[offset] |= value << STM32_GPIO_BKP_VAL;
+}
+
+static void stm32_gpio_backup_mode(struct stm32_gpio_bank *bank, u32 offset,
+ u32 mode, u32 alt)
+{
+ bank->pin_backup[offset] &= ~(STM32_GPIO_BKP_MODE_MASK |
+ STM32_GPIO_BKP_ALT_MASK);
+ bank->pin_backup[offset] |= mode << STM32_GPIO_BKP_MODE_SHIFT;
+ bank->pin_backup[offset] |= alt << STM32_GPIO_BKP_ALT_SHIFT;
+}
+
+static void stm32_gpio_backup_driving(struct stm32_gpio_bank *bank, u32 offset,
+ u32 drive)
+{
+ bank->pin_backup[offset] &= ~BIT(STM32_GPIO_BKP_TYPE);
+ bank->pin_backup[offset] |= drive << STM32_GPIO_BKP_TYPE;
+}
+
+static void stm32_gpio_backup_speed(struct stm32_gpio_bank *bank, u32 offset,
+ u32 speed)
+{
+ bank->pin_backup[offset] &= ~STM32_GPIO_BKP_SPEED_MASK;
+ bank->pin_backup[offset] |= speed << STM32_GPIO_BKP_SPEED_SHIFT;
+}
+
+static void stm32_gpio_backup_bias(struct stm32_gpio_bank *bank, u32 offset,
+ u32 bias)
+{
+ bank->pin_backup[offset] &= ~STM32_GPIO_BKP_PUPD_MASK;
+ bank->pin_backup[offset] |= bias << STM32_GPIO_BKP_PUPD_SHIFT;
+}
+
+/* GPIO functions */
+
+static inline void __stm32_gpio_set(struct stm32_gpio_bank *bank,
+ unsigned offset, int value)
+{
+ stm32_gpio_backup_value(bank, offset, value);
+
+ if (!value)
+ offset += STM32_GPIO_PINS_PER_BANK;
+
+ writel_relaxed(BIT(offset), bank->base + STM32_GPIO_BSRR);
+}
+
+static int stm32_gpio_request(struct gpio_chip *chip, unsigned offset)
+{
+ struct stm32_gpio_bank *bank = gpiochip_get_data(chip);
+ struct stm32_pinctrl *pctl = dev_get_drvdata(bank->gpio_chip.parent);
+ struct pinctrl_gpio_range *range;
+ int pin = offset + (bank->bank_nr * STM32_GPIO_PINS_PER_BANK);
+
+ range = pinctrl_find_gpio_range_from_pin_nolock(pctl->pctl_dev, pin);
+ if (!range) {
+ dev_err(pctl->dev, "pin %d not in range.\n", pin);
+ return -EINVAL;
+ }
+
+ return pinctrl_gpio_request(chip->base + offset);
+}
+
+static void stm32_gpio_free(struct gpio_chip *chip, unsigned offset)
+{
+ pinctrl_gpio_free(chip->base + offset);
+}
+
+static int stm32_gpio_get(struct gpio_chip *chip, unsigned offset)
+{
+ struct stm32_gpio_bank *bank = gpiochip_get_data(chip);
+
+ return !!(readl_relaxed(bank->base + STM32_GPIO_IDR) & BIT(offset));
+}
+
+static void stm32_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
+{
+ struct stm32_gpio_bank *bank = gpiochip_get_data(chip);
+
+ __stm32_gpio_set(bank, offset, value);
+}
+
+static int stm32_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
+{
+ return pinctrl_gpio_direction_input(chip->base + offset);
+}
+
+static int stm32_gpio_direction_output(struct gpio_chip *chip,
+ unsigned offset, int value)
+{
+ struct stm32_gpio_bank *bank = gpiochip_get_data(chip);
+
+ __stm32_gpio_set(bank, offset, value);
+ pinctrl_gpio_direction_output(chip->base + offset);
+
+ return 0;
+}
+
+
+static int stm32_gpio_to_irq(struct gpio_chip *chip, unsigned int offset)
+{
+ struct stm32_gpio_bank *bank = gpiochip_get_data(chip);
+ struct irq_fwspec fwspec;
+
+ fwspec.fwnode = bank->fwnode;
+ fwspec.param_count = 2;
+ fwspec.param[0] = offset;
+ fwspec.param[1] = IRQ_TYPE_NONE;
+
+ return irq_create_fwspec_mapping(&fwspec);
+}
+
+static int stm32_gpio_get_direction(struct gpio_chip *chip, unsigned int offset)
+{
+ struct stm32_gpio_bank *bank = gpiochip_get_data(chip);
+ int pin = stm32_gpio_pin(offset);
+ int ret;
+ u32 mode, alt;
+
+ stm32_pmx_get_mode(bank, pin, &mode, &alt);
+ if ((alt == 0) && (mode == 0))
+ ret = GPIO_LINE_DIRECTION_IN;
+ else if ((alt == 0) && (mode == 1))
+ ret = GPIO_LINE_DIRECTION_OUT;
+ else
+ ret = -EINVAL;
+
+ return ret;
+}
+
+static int stm32_gpio_init_valid_mask(struct gpio_chip *chip,
+ unsigned long *valid_mask,
+ unsigned int ngpios)
+{
+ struct stm32_gpio_bank *bank = gpiochip_get_data(chip);
+ struct stm32_pinctrl *pctl = dev_get_drvdata(bank->gpio_chip.parent);
+ unsigned int i;
+ u32 sec;
+
+ /* All gpio are valid per default */
+ bitmap_fill(valid_mask, ngpios);
+
+ if (bank->secure_control) {
+ /* Tag secured pins as invalid */
+ sec = readl_relaxed(bank->base + STM32_GPIO_SECCFGR);
+
+ for (i = 0; i < ngpios; i++) {
+ if (sec & BIT(i)) {
+ clear_bit(i, valid_mask);
+ dev_dbg(pctl->dev, "No access to gpio %d - %d\n", bank->bank_nr, i);
+ }
+ }
+ }
+
+ return 0;
+}
+
+static const struct gpio_chip stm32_gpio_template = {
+ .request = stm32_gpio_request,
+ .free = stm32_gpio_free,
+ .get = stm32_gpio_get,
+ .set = stm32_gpio_set,
+ .direction_input = stm32_gpio_direction_input,
+ .direction_output = stm32_gpio_direction_output,
+ .to_irq = stm32_gpio_to_irq,
+ .get_direction = stm32_gpio_get_direction,
+ .set_config = gpiochip_generic_config,
+ .init_valid_mask = stm32_gpio_init_valid_mask,
+};
+
+static void stm32_gpio_irq_trigger(struct irq_data *d)
+{
+ struct stm32_gpio_bank *bank = d->domain->host_data;
+ int level;
+
+ /* Do not access the GPIO if this is not LEVEL triggered IRQ. */
+ if (!(bank->irq_type[d->hwirq] & IRQ_TYPE_LEVEL_MASK))
+ return;
+
+ /* If level interrupt type then retrig */
+ level = stm32_gpio_get(&bank->gpio_chip, d->hwirq);
+ if ((level == 0 && bank->irq_type[d->hwirq] == IRQ_TYPE_LEVEL_LOW) ||
+ (level == 1 && bank->irq_type[d->hwirq] == IRQ_TYPE_LEVEL_HIGH))
+ irq_chip_retrigger_hierarchy(d);
+}
+
+static void stm32_gpio_irq_eoi(struct irq_data *d)
+{
+ irq_chip_eoi_parent(d);
+ stm32_gpio_irq_trigger(d);
+};
+
+static int stm32_gpio_set_type(struct irq_data *d, unsigned int type)
+{
+ struct stm32_gpio_bank *bank = d->domain->host_data;
+ u32 parent_type;
+
+ switch (type) {
+ case IRQ_TYPE_EDGE_RISING:
+ case IRQ_TYPE_EDGE_FALLING:
+ case IRQ_TYPE_EDGE_BOTH:
+ parent_type = type;
+ break;
+ case IRQ_TYPE_LEVEL_HIGH:
+ parent_type = IRQ_TYPE_EDGE_RISING;
+ break;
+ case IRQ_TYPE_LEVEL_LOW:
+ parent_type = IRQ_TYPE_EDGE_FALLING;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ bank->irq_type[d->hwirq] = type;
+
+ return irq_chip_set_type_parent(d, parent_type);
+};
+
+static int stm32_gpio_irq_request_resources(struct irq_data *irq_data)
+{
+ struct stm32_gpio_bank *bank = irq_data->domain->host_data;
+ struct stm32_pinctrl *pctl = dev_get_drvdata(bank->gpio_chip.parent);
+ int ret;
+
+ ret = stm32_gpio_direction_input(&bank->gpio_chip, irq_data->hwirq);
+ if (ret)
+ return ret;
+
+ ret = gpiochip_lock_as_irq(&bank->gpio_chip, irq_data->hwirq);
+ if (ret) {
+ dev_err(pctl->dev, "unable to lock HW IRQ %lu for IRQ\n",
+ irq_data->hwirq);
+ return ret;
+ }
+
+ return 0;
+}
+
+static void stm32_gpio_irq_release_resources(struct irq_data *irq_data)
+{
+ struct stm32_gpio_bank *bank = irq_data->domain->host_data;
+
+ gpiochip_unlock_as_irq(&bank->gpio_chip, irq_data->hwirq);
+}
+
+static void stm32_gpio_irq_unmask(struct irq_data *d)
+{
+ irq_chip_unmask_parent(d);
+ stm32_gpio_irq_trigger(d);
+}
+
+static struct irq_chip stm32_gpio_irq_chip = {
+ .name = "stm32gpio",
+ .irq_eoi = stm32_gpio_irq_eoi,
+ .irq_ack = irq_chip_ack_parent,
+ .irq_mask = irq_chip_mask_parent,
+ .irq_unmask = stm32_gpio_irq_unmask,
+ .irq_set_type = stm32_gpio_set_type,
+ .irq_set_wake = irq_chip_set_wake_parent,
+ .irq_request_resources = stm32_gpio_irq_request_resources,
+ .irq_release_resources = stm32_gpio_irq_release_resources,
+};
+
+static int stm32_gpio_domain_translate(struct irq_domain *d,
+ struct irq_fwspec *fwspec,
+ unsigned long *hwirq,
+ unsigned int *type)
+{
+ if ((fwspec->param_count != 2) ||
+ (fwspec->param[0] >= STM32_GPIO_IRQ_LINE))
+ return -EINVAL;
+
+ *hwirq = fwspec->param[0];
+ *type = fwspec->param[1];
+ return 0;
+}
+
+static int stm32_gpio_domain_activate(struct irq_domain *d,
+ struct irq_data *irq_data, bool reserve)
+{
+ struct stm32_gpio_bank *bank = d->host_data;
+ struct stm32_pinctrl *pctl = dev_get_drvdata(bank->gpio_chip.parent);
+ int ret = 0;
+
+ if (pctl->hwlock) {
+ ret = hwspin_lock_timeout_in_atomic(pctl->hwlock,
+ HWSPNLCK_TIMEOUT);
+ if (ret) {
+ dev_err(pctl->dev, "Can't get hwspinlock\n");
+ return ret;
+ }
+ }
+
+ regmap_field_write(pctl->irqmux[irq_data->hwirq], bank->bank_ioport_nr);
+
+ if (pctl->hwlock)
+ hwspin_unlock_in_atomic(pctl->hwlock);
+
+ return ret;
+}
+
+static int stm32_gpio_domain_alloc(struct irq_domain *d,
+ unsigned int virq,
+ unsigned int nr_irqs, void *data)
+{
+ struct stm32_gpio_bank *bank = d->host_data;
+ struct irq_fwspec *fwspec = data;
+ struct irq_fwspec parent_fwspec;
+ struct stm32_pinctrl *pctl = dev_get_drvdata(bank->gpio_chip.parent);
+ irq_hw_number_t hwirq = fwspec->param[0];
+ unsigned long flags;
+ int ret = 0;
+
+ /*
+ * Check first that the IRQ MUX of that line is free.
+ * gpio irq mux is shared between several banks, protect with a lock
+ */
+ spin_lock_irqsave(&pctl->irqmux_lock, flags);
+
+ if (pctl->irqmux_map & BIT(hwirq)) {
+ dev_err(pctl->dev, "irq line %ld already requested.\n", hwirq);
+ ret = -EBUSY;
+ } else {
+ pctl->irqmux_map |= BIT(hwirq);
+ }
+
+ spin_unlock_irqrestore(&pctl->irqmux_lock, flags);
+ if (ret)
+ return ret;
+
+ parent_fwspec.fwnode = d->parent->fwnode;
+ parent_fwspec.param_count = 2;
+ parent_fwspec.param[0] = fwspec->param[0];
+ parent_fwspec.param[1] = fwspec->param[1];
+
+ irq_domain_set_hwirq_and_chip(d, virq, hwirq, &stm32_gpio_irq_chip,
+ bank);
+
+ return irq_domain_alloc_irqs_parent(d, virq, nr_irqs, &parent_fwspec);
+}
+
+static void stm32_gpio_domain_free(struct irq_domain *d, unsigned int virq,
+ unsigned int nr_irqs)
+{
+ struct stm32_gpio_bank *bank = d->host_data;
+ struct stm32_pinctrl *pctl = dev_get_drvdata(bank->gpio_chip.parent);
+ struct irq_data *irq_data = irq_domain_get_irq_data(d, virq);
+ unsigned long flags, hwirq = irq_data->hwirq;
+
+ irq_domain_free_irqs_common(d, virq, nr_irqs);
+
+ spin_lock_irqsave(&pctl->irqmux_lock, flags);
+ pctl->irqmux_map &= ~BIT(hwirq);
+ spin_unlock_irqrestore(&pctl->irqmux_lock, flags);
+}
+
+static const struct irq_domain_ops stm32_gpio_domain_ops = {
+ .translate = stm32_gpio_domain_translate,
+ .alloc = stm32_gpio_domain_alloc,
+ .free = stm32_gpio_domain_free,
+ .activate = stm32_gpio_domain_activate,
+};
+
+/* Pinctrl functions */
+static struct stm32_pinctrl_group *
+stm32_pctrl_find_group_by_pin(struct stm32_pinctrl *pctl, u32 pin)
+{
+ int i;
+
+ for (i = 0; i < pctl->ngroups; i++) {
+ struct stm32_pinctrl_group *grp = pctl->groups + i;
+
+ if (grp->pin == pin)
+ return grp;
+ }
+
+ return NULL;
+}
+
+static bool stm32_pctrl_is_function_valid(struct stm32_pinctrl *pctl,
+ u32 pin_num, u32 fnum)
+{
+ int i, k;
+
+ for (i = 0; i < pctl->npins; i++) {
+ const struct stm32_desc_pin *pin = pctl->pins + i;
+ const struct stm32_desc_function *func = pin->functions;
+
+ if (pin->pin.number != pin_num)
+ continue;
+
+ for (k = 0; k < STM32_CONFIG_NUM; k++) {
+ if (func->num == fnum)
+ return true;
+ func++;
+ }
+
+ break;
+ }
+
+ dev_err(pctl->dev, "invalid function %d on pin %d .\n", fnum, pin_num);
+
+ return false;
+}
+
+static int stm32_pctrl_dt_node_to_map_func(struct stm32_pinctrl *pctl,
+ u32 pin, u32 fnum, struct stm32_pinctrl_group *grp,
+ struct pinctrl_map **map, unsigned *reserved_maps,
+ unsigned *num_maps)
+{
+ if (*num_maps == *reserved_maps)
+ return -ENOSPC;
+
+ (*map)[*num_maps].type = PIN_MAP_TYPE_MUX_GROUP;
+ (*map)[*num_maps].data.mux.group = grp->name;
+
+ if (!stm32_pctrl_is_function_valid(pctl, pin, fnum))
+ return -EINVAL;
+
+ (*map)[*num_maps].data.mux.function = stm32_gpio_functions[fnum];
+ (*num_maps)++;
+
+ return 0;
+}
+
+static int stm32_pctrl_dt_subnode_to_map(struct pinctrl_dev *pctldev,
+ struct device_node *node,
+ struct pinctrl_map **map,
+ unsigned *reserved_maps,
+ unsigned *num_maps)
+{
+ struct stm32_pinctrl *pctl;
+ struct stm32_pinctrl_group *grp;
+ struct property *pins;
+ u32 pinfunc, pin, func;
+ unsigned long *configs;
+ unsigned int num_configs;
+ bool has_config = 0;
+ unsigned reserve = 0;
+ int num_pins, num_funcs, maps_per_pin, i, err = 0;
+
+ pctl = pinctrl_dev_get_drvdata(pctldev);
+
+ pins = of_find_property(node, "pinmux", NULL);
+ if (!pins) {
+ dev_err(pctl->dev, "missing pins property in node %pOFn .\n",
+ node);
+ return -EINVAL;
+ }
+
+ err = pinconf_generic_parse_dt_config(node, pctldev, &configs,
+ &num_configs);
+ if (err)
+ return err;
+
+ if (num_configs)
+ has_config = 1;
+
+ num_pins = pins->length / sizeof(u32);
+ num_funcs = num_pins;
+ maps_per_pin = 0;
+ if (num_funcs)
+ maps_per_pin++;
+ if (has_config && num_pins >= 1)
+ maps_per_pin++;
+
+ if (!num_pins || !maps_per_pin) {
+ err = -EINVAL;
+ goto exit;
+ }
+
+ reserve = num_pins * maps_per_pin;
+
+ err = pinctrl_utils_reserve_map(pctldev, map,
+ reserved_maps, num_maps, reserve);
+ if (err)
+ goto exit;
+
+ for (i = 0; i < num_pins; i++) {
+ err = of_property_read_u32_index(node, "pinmux",
+ i, &pinfunc);
+ if (err)
+ goto exit;
+
+ pin = STM32_GET_PIN_NO(pinfunc);
+ func = STM32_GET_PIN_FUNC(pinfunc);
+
+ if (!stm32_pctrl_is_function_valid(pctl, pin, func)) {
+ err = -EINVAL;
+ goto exit;
+ }
+
+ grp = stm32_pctrl_find_group_by_pin(pctl, pin);
+ if (!grp) {
+ dev_err(pctl->dev, "unable to match pin %d to group\n",
+ pin);
+ err = -EINVAL;
+ goto exit;
+ }
+
+ err = stm32_pctrl_dt_node_to_map_func(pctl, pin, func, grp, map,
+ reserved_maps, num_maps);
+ if (err)
+ goto exit;
+
+ if (has_config) {
+ err = pinctrl_utils_add_map_configs(pctldev, map,
+ reserved_maps, num_maps, grp->name,
+ configs, num_configs,
+ PIN_MAP_TYPE_CONFIGS_GROUP);
+ if (err)
+ goto exit;
+ }
+ }
+
+exit:
+ kfree(configs);
+ return err;
+}
+
+static int stm32_pctrl_dt_node_to_map(struct pinctrl_dev *pctldev,
+ struct device_node *np_config,
+ struct pinctrl_map **map, unsigned *num_maps)
+{
+ struct device_node *np;
+ unsigned reserved_maps;
+ int ret;
+
+ *map = NULL;
+ *num_maps = 0;
+ reserved_maps = 0;
+
+ for_each_child_of_node(np_config, np) {
+ ret = stm32_pctrl_dt_subnode_to_map(pctldev, np, map,
+ &reserved_maps, num_maps);
+ if (ret < 0) {
+ pinctrl_utils_free_map(pctldev, *map, *num_maps);
+ of_node_put(np);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static int stm32_pctrl_get_groups_count(struct pinctrl_dev *pctldev)
+{
+ struct stm32_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+
+ return pctl->ngroups;
+}
+
+static const char *stm32_pctrl_get_group_name(struct pinctrl_dev *pctldev,
+ unsigned group)
+{
+ struct stm32_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+
+ return pctl->groups[group].name;
+}
+
+static int stm32_pctrl_get_group_pins(struct pinctrl_dev *pctldev,
+ unsigned group,
+ const unsigned **pins,
+ unsigned *num_pins)
+{
+ struct stm32_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+
+ *pins = (unsigned *)&pctl->groups[group].pin;
+ *num_pins = 1;
+
+ return 0;
+}
+
+static const struct pinctrl_ops stm32_pctrl_ops = {
+ .dt_node_to_map = stm32_pctrl_dt_node_to_map,
+ .dt_free_map = pinctrl_utils_free_map,
+ .get_groups_count = stm32_pctrl_get_groups_count,
+ .get_group_name = stm32_pctrl_get_group_name,
+ .get_group_pins = stm32_pctrl_get_group_pins,
+};
+
+
+/* Pinmux functions */
+
+static int stm32_pmx_get_funcs_cnt(struct pinctrl_dev *pctldev)
+{
+ return ARRAY_SIZE(stm32_gpio_functions);
+}
+
+static const char *stm32_pmx_get_func_name(struct pinctrl_dev *pctldev,
+ unsigned selector)
+{
+ return stm32_gpio_functions[selector];
+}
+
+static int stm32_pmx_get_func_groups(struct pinctrl_dev *pctldev,
+ unsigned function,
+ const char * const **groups,
+ unsigned * const num_groups)
+{
+ struct stm32_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+
+ *groups = pctl->grp_names;
+ *num_groups = pctl->ngroups;
+
+ return 0;
+}
+
+static int stm32_pmx_set_mode(struct stm32_gpio_bank *bank,
+ int pin, u32 mode, u32 alt)
+{
+ struct stm32_pinctrl *pctl = dev_get_drvdata(bank->gpio_chip.parent);
+ u32 val;
+ int alt_shift = (pin % 8) * 4;
+ int alt_offset = STM32_GPIO_AFRL + (pin / 8) * 4;
+ unsigned long flags;
+ int err = 0;
+
+ spin_lock_irqsave(&bank->lock, flags);
+
+ if (pctl->hwlock) {
+ err = hwspin_lock_timeout_in_atomic(pctl->hwlock,
+ HWSPNLCK_TIMEOUT);
+ if (err) {
+ dev_err(pctl->dev, "Can't get hwspinlock\n");
+ goto unlock;
+ }
+ }
+
+ val = readl_relaxed(bank->base + alt_offset);
+ val &= ~GENMASK(alt_shift + 3, alt_shift);
+ val |= (alt << alt_shift);
+ writel_relaxed(val, bank->base + alt_offset);
+
+ val = readl_relaxed(bank->base + STM32_GPIO_MODER);
+ val &= ~GENMASK(pin * 2 + 1, pin * 2);
+ val |= mode << (pin * 2);
+ writel_relaxed(val, bank->base + STM32_GPIO_MODER);
+
+ if (pctl->hwlock)
+ hwspin_unlock_in_atomic(pctl->hwlock);
+
+ stm32_gpio_backup_mode(bank, pin, mode, alt);
+
+unlock:
+ spin_unlock_irqrestore(&bank->lock, flags);
+
+ return err;
+}
+
+void stm32_pmx_get_mode(struct stm32_gpio_bank *bank, int pin, u32 *mode,
+ u32 *alt)
+{
+ u32 val;
+ int alt_shift = (pin % 8) * 4;
+ int alt_offset = STM32_GPIO_AFRL + (pin / 8) * 4;
+ unsigned long flags;
+
+ spin_lock_irqsave(&bank->lock, flags);
+
+ val = readl_relaxed(bank->base + alt_offset);
+ val &= GENMASK(alt_shift + 3, alt_shift);
+ *alt = val >> alt_shift;
+
+ val = readl_relaxed(bank->base + STM32_GPIO_MODER);
+ val &= GENMASK(pin * 2 + 1, pin * 2);
+ *mode = val >> (pin * 2);
+
+ spin_unlock_irqrestore(&bank->lock, flags);
+}
+
+static int stm32_pmx_set_mux(struct pinctrl_dev *pctldev,
+ unsigned function,
+ unsigned group)
+{
+ bool ret;
+ struct stm32_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+ struct stm32_pinctrl_group *g = pctl->groups + group;
+ struct pinctrl_gpio_range *range;
+ struct stm32_gpio_bank *bank;
+ u32 mode, alt;
+ int pin;
+
+ ret = stm32_pctrl_is_function_valid(pctl, g->pin, function);
+ if (!ret)
+ return -EINVAL;
+
+ range = pinctrl_find_gpio_range_from_pin(pctldev, g->pin);
+ if (!range) {
+ dev_err(pctl->dev, "No gpio range defined.\n");
+ return -EINVAL;
+ }
+
+ bank = gpiochip_get_data(range->gc);
+ pin = stm32_gpio_pin(g->pin);
+
+ mode = stm32_gpio_get_mode(function);
+ alt = stm32_gpio_get_alt(function);
+
+ return stm32_pmx_set_mode(bank, pin, mode, alt);
+}
+
+static int stm32_pmx_gpio_set_direction(struct pinctrl_dev *pctldev,
+ struct pinctrl_gpio_range *range, unsigned gpio,
+ bool input)
+{
+ struct stm32_gpio_bank *bank = gpiochip_get_data(range->gc);
+ int pin = stm32_gpio_pin(gpio);
+
+ return stm32_pmx_set_mode(bank, pin, !input, 0);
+}
+
+static int stm32_pmx_request(struct pinctrl_dev *pctldev, unsigned int gpio)
+{
+ struct stm32_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+ struct pinctrl_gpio_range *range;
+
+ range = pinctrl_find_gpio_range_from_pin_nolock(pctldev, gpio);
+ if (!range) {
+ dev_err(pctl->dev, "No gpio range defined.\n");
+ return -EINVAL;
+ }
+
+ if (!gpiochip_line_is_valid(range->gc, stm32_gpio_pin(gpio))) {
+ dev_warn(pctl->dev, "Can't access gpio %d\n", gpio);
+ return -EACCES;
+ }
+
+ return 0;
+}
+
+static const struct pinmux_ops stm32_pmx_ops = {
+ .get_functions_count = stm32_pmx_get_funcs_cnt,
+ .get_function_name = stm32_pmx_get_func_name,
+ .get_function_groups = stm32_pmx_get_func_groups,
+ .set_mux = stm32_pmx_set_mux,
+ .gpio_set_direction = stm32_pmx_gpio_set_direction,
+ .request = stm32_pmx_request,
+ .strict = true,
+};
+
+/* Pinconf functions */
+
+static int stm32_pconf_set_driving(struct stm32_gpio_bank *bank,
+ unsigned offset, u32 drive)
+{
+ struct stm32_pinctrl *pctl = dev_get_drvdata(bank->gpio_chip.parent);
+ unsigned long flags;
+ u32 val;
+ int err = 0;
+
+ spin_lock_irqsave(&bank->lock, flags);
+
+ if (pctl->hwlock) {
+ err = hwspin_lock_timeout_in_atomic(pctl->hwlock,
+ HWSPNLCK_TIMEOUT);
+ if (err) {
+ dev_err(pctl->dev, "Can't get hwspinlock\n");
+ goto unlock;
+ }
+ }
+
+ val = readl_relaxed(bank->base + STM32_GPIO_TYPER);
+ val &= ~BIT(offset);
+ val |= drive << offset;
+ writel_relaxed(val, bank->base + STM32_GPIO_TYPER);
+
+ if (pctl->hwlock)
+ hwspin_unlock_in_atomic(pctl->hwlock);
+
+ stm32_gpio_backup_driving(bank, offset, drive);
+
+unlock:
+ spin_unlock_irqrestore(&bank->lock, flags);
+
+ return err;
+}
+
+static u32 stm32_pconf_get_driving(struct stm32_gpio_bank *bank,
+ unsigned int offset)
+{
+ unsigned long flags;
+ u32 val;
+
+ spin_lock_irqsave(&bank->lock, flags);
+
+ val = readl_relaxed(bank->base + STM32_GPIO_TYPER);
+ val &= BIT(offset);
+
+ spin_unlock_irqrestore(&bank->lock, flags);
+
+ return (val >> offset);
+}
+
+static int stm32_pconf_set_speed(struct stm32_gpio_bank *bank,
+ unsigned offset, u32 speed)
+{
+ struct stm32_pinctrl *pctl = dev_get_drvdata(bank->gpio_chip.parent);
+ unsigned long flags;
+ u32 val;
+ int err = 0;
+
+ spin_lock_irqsave(&bank->lock, flags);
+
+ if (pctl->hwlock) {
+ err = hwspin_lock_timeout_in_atomic(pctl->hwlock,
+ HWSPNLCK_TIMEOUT);
+ if (err) {
+ dev_err(pctl->dev, "Can't get hwspinlock\n");
+ goto unlock;
+ }
+ }
+
+ val = readl_relaxed(bank->base + STM32_GPIO_SPEEDR);
+ val &= ~GENMASK(offset * 2 + 1, offset * 2);
+ val |= speed << (offset * 2);
+ writel_relaxed(val, bank->base + STM32_GPIO_SPEEDR);
+
+ if (pctl->hwlock)
+ hwspin_unlock_in_atomic(pctl->hwlock);
+
+ stm32_gpio_backup_speed(bank, offset, speed);
+
+unlock:
+ spin_unlock_irqrestore(&bank->lock, flags);
+
+ return err;
+}
+
+static u32 stm32_pconf_get_speed(struct stm32_gpio_bank *bank,
+ unsigned int offset)
+{
+ unsigned long flags;
+ u32 val;
+
+ spin_lock_irqsave(&bank->lock, flags);
+
+ val = readl_relaxed(bank->base + STM32_GPIO_SPEEDR);
+ val &= GENMASK(offset * 2 + 1, offset * 2);
+
+ spin_unlock_irqrestore(&bank->lock, flags);
+
+ return (val >> (offset * 2));
+}
+
+static int stm32_pconf_set_bias(struct stm32_gpio_bank *bank,
+ unsigned offset, u32 bias)
+{
+ struct stm32_pinctrl *pctl = dev_get_drvdata(bank->gpio_chip.parent);
+ unsigned long flags;
+ u32 val;
+ int err = 0;
+
+ spin_lock_irqsave(&bank->lock, flags);
+
+ if (pctl->hwlock) {
+ err = hwspin_lock_timeout_in_atomic(pctl->hwlock,
+ HWSPNLCK_TIMEOUT);
+ if (err) {
+ dev_err(pctl->dev, "Can't get hwspinlock\n");
+ goto unlock;
+ }
+ }
+
+ val = readl_relaxed(bank->base + STM32_GPIO_PUPDR);
+ val &= ~GENMASK(offset * 2 + 1, offset * 2);
+ val |= bias << (offset * 2);
+ writel_relaxed(val, bank->base + STM32_GPIO_PUPDR);
+
+ if (pctl->hwlock)
+ hwspin_unlock_in_atomic(pctl->hwlock);
+
+ stm32_gpio_backup_bias(bank, offset, bias);
+
+unlock:
+ spin_unlock_irqrestore(&bank->lock, flags);
+
+ return err;
+}
+
+static u32 stm32_pconf_get_bias(struct stm32_gpio_bank *bank,
+ unsigned int offset)
+{
+ unsigned long flags;
+ u32 val;
+
+ spin_lock_irqsave(&bank->lock, flags);
+
+ val = readl_relaxed(bank->base + STM32_GPIO_PUPDR);
+ val &= GENMASK(offset * 2 + 1, offset * 2);
+
+ spin_unlock_irqrestore(&bank->lock, flags);
+
+ return (val >> (offset * 2));
+}
+
+static bool stm32_pconf_get(struct stm32_gpio_bank *bank,
+ unsigned int offset, bool dir)
+{
+ unsigned long flags;
+ u32 val;
+
+ spin_lock_irqsave(&bank->lock, flags);
+
+ if (dir)
+ val = !!(readl_relaxed(bank->base + STM32_GPIO_IDR) &
+ BIT(offset));
+ else
+ val = !!(readl_relaxed(bank->base + STM32_GPIO_ODR) &
+ BIT(offset));
+
+ spin_unlock_irqrestore(&bank->lock, flags);
+
+ return val;
+}
+
+static int stm32_pconf_parse_conf(struct pinctrl_dev *pctldev,
+ unsigned int pin, enum pin_config_param param,
+ enum pin_config_param arg)
+{
+ struct stm32_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+ struct pinctrl_gpio_range *range;
+ struct stm32_gpio_bank *bank;
+ int offset, ret = 0;
+
+ range = pinctrl_find_gpio_range_from_pin_nolock(pctldev, pin);
+ if (!range) {
+ dev_err(pctl->dev, "No gpio range defined.\n");
+ return -EINVAL;
+ }
+
+ bank = gpiochip_get_data(range->gc);
+ offset = stm32_gpio_pin(pin);
+
+ if (!gpiochip_line_is_valid(range->gc, offset)) {
+ dev_warn(pctl->dev, "Can't access gpio %d\n", pin);
+ return -EACCES;
+ }
+
+ switch (param) {
+ case PIN_CONFIG_DRIVE_PUSH_PULL:
+ ret = stm32_pconf_set_driving(bank, offset, 0);
+ break;
+ case PIN_CONFIG_DRIVE_OPEN_DRAIN:
+ ret = stm32_pconf_set_driving(bank, offset, 1);
+ break;
+ case PIN_CONFIG_SLEW_RATE:
+ ret = stm32_pconf_set_speed(bank, offset, arg);
+ break;
+ case PIN_CONFIG_BIAS_DISABLE:
+ ret = stm32_pconf_set_bias(bank, offset, 0);
+ break;
+ case PIN_CONFIG_BIAS_PULL_UP:
+ ret = stm32_pconf_set_bias(bank, offset, 1);
+ break;
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ ret = stm32_pconf_set_bias(bank, offset, 2);
+ break;
+ case PIN_CONFIG_OUTPUT:
+ __stm32_gpio_set(bank, offset, arg);
+ ret = stm32_pmx_gpio_set_direction(pctldev, range, pin, false);
+ break;
+ default:
+ ret = -ENOTSUPP;
+ }
+
+ return ret;
+}
+
+static int stm32_pconf_group_get(struct pinctrl_dev *pctldev,
+ unsigned group,
+ unsigned long *config)
+{
+ struct stm32_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+
+ *config = pctl->groups[group].config;
+
+ return 0;
+}
+
+static int stm32_pconf_group_set(struct pinctrl_dev *pctldev, unsigned group,
+ unsigned long *configs, unsigned num_configs)
+{
+ struct stm32_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+ struct stm32_pinctrl_group *g = &pctl->groups[group];
+ int i, ret;
+
+ for (i = 0; i < num_configs; i++) {
+ mutex_lock(&pctldev->mutex);
+ ret = stm32_pconf_parse_conf(pctldev, g->pin,
+ pinconf_to_config_param(configs[i]),
+ pinconf_to_config_argument(configs[i]));
+ mutex_unlock(&pctldev->mutex);
+ if (ret < 0)
+ return ret;
+
+ g->config = configs[i];
+ }
+
+ return 0;
+}
+
+static int stm32_pconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
+ unsigned long *configs, unsigned int num_configs)
+{
+ int i, ret;
+
+ for (i = 0; i < num_configs; i++) {
+ ret = stm32_pconf_parse_conf(pctldev, pin,
+ pinconf_to_config_param(configs[i]),
+ pinconf_to_config_argument(configs[i]));
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+static struct stm32_desc_pin *
+stm32_pconf_get_pin_desc_by_pin_number(struct stm32_pinctrl *pctl,
+ unsigned int pin_number)
+{
+ struct stm32_desc_pin *pins = pctl->pins;
+ int i;
+
+ for (i = 0; i < pctl->npins; i++) {
+ if (pins->pin.number == pin_number)
+ return pins;
+ pins++;
+ }
+ return NULL;
+}
+
+static void stm32_pconf_dbg_show(struct pinctrl_dev *pctldev,
+ struct seq_file *s,
+ unsigned int pin)
+{
+ struct stm32_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+ const struct stm32_desc_pin *pin_desc;
+ struct pinctrl_gpio_range *range;
+ struct stm32_gpio_bank *bank;
+ int offset;
+ u32 mode, alt, drive, speed, bias;
+ static const char * const modes[] = {
+ "input", "output", "alternate", "analog" };
+ static const char * const speeds[] = {
+ "low", "medium", "high", "very high" };
+ static const char * const biasing[] = {
+ "floating", "pull up", "pull down", "" };
+ bool val;
+
+ range = pinctrl_find_gpio_range_from_pin_nolock(pctldev, pin);
+ if (!range)
+ return;
+
+ bank = gpiochip_get_data(range->gc);
+ offset = stm32_gpio_pin(pin);
+
+ if (!gpiochip_line_is_valid(range->gc, offset)) {
+ seq_puts(s, "NO ACCESS");
+ return;
+ }
+
+ stm32_pmx_get_mode(bank, offset, &mode, &alt);
+ bias = stm32_pconf_get_bias(bank, offset);
+
+ seq_printf(s, "%s ", modes[mode]);
+
+ switch (mode) {
+ /* input */
+ case 0:
+ val = stm32_pconf_get(bank, offset, true);
+ seq_printf(s, "- %s - %s",
+ val ? "high" : "low",
+ biasing[bias]);
+ break;
+
+ /* output */
+ case 1:
+ drive = stm32_pconf_get_driving(bank, offset);
+ speed = stm32_pconf_get_speed(bank, offset);
+ val = stm32_pconf_get(bank, offset, false);
+ seq_printf(s, "- %s - %s - %s - %s %s",
+ val ? "high" : "low",
+ drive ? "open drain" : "push pull",
+ biasing[bias],
+ speeds[speed], "speed");
+ break;
+
+ /* alternate */
+ case 2:
+ drive = stm32_pconf_get_driving(bank, offset);
+ speed = stm32_pconf_get_speed(bank, offset);
+ pin_desc = stm32_pconf_get_pin_desc_by_pin_number(pctl, pin);
+ if (!pin_desc)
+ return;
+
+ seq_printf(s, "%d (%s) - %s - %s - %s %s", alt,
+ pin_desc->functions[alt + 1].name,
+ drive ? "open drain" : "push pull",
+ biasing[bias],
+ speeds[speed], "speed");
+ break;
+
+ /* analog */
+ case 3:
+ break;
+ }
+}
+
+static const struct pinconf_ops stm32_pconf_ops = {
+ .pin_config_group_get = stm32_pconf_group_get,
+ .pin_config_group_set = stm32_pconf_group_set,
+ .pin_config_set = stm32_pconf_set,
+ .pin_config_dbg_show = stm32_pconf_dbg_show,
+};
+
+static int stm32_gpiolib_register_bank(struct stm32_pinctrl *pctl, struct fwnode_handle *fwnode)
+{
+ struct stm32_gpio_bank *bank = &pctl->banks[pctl->nbanks];
+ int bank_ioport_nr;
+ struct pinctrl_gpio_range *range = &bank->range;
+ struct fwnode_reference_args args;
+ struct device *dev = pctl->dev;
+ struct resource res;
+ int npins = STM32_GPIO_PINS_PER_BANK;
+ int bank_nr, err, i = 0;
+
+ if (!IS_ERR(bank->rstc))
+ reset_control_deassert(bank->rstc);
+
+ if (of_address_to_resource(to_of_node(fwnode), 0, &res))
+ return -ENODEV;
+
+ bank->base = devm_ioremap_resource(dev, &res);
+ if (IS_ERR(bank->base))
+ return PTR_ERR(bank->base);
+
+ err = clk_prepare_enable(bank->clk);
+ if (err) {
+ dev_err(dev, "failed to prepare_enable clk (%d)\n", err);
+ return err;
+ }
+
+ bank->gpio_chip = stm32_gpio_template;
+
+ fwnode_property_read_string(fwnode, "st,bank-name", &bank->gpio_chip.label);
+
+ if (!fwnode_property_get_reference_args(fwnode, "gpio-ranges", NULL, 3, i, &args)) {
+ bank_nr = args.args[1] / STM32_GPIO_PINS_PER_BANK;
+ bank->gpio_chip.base = args.args[1];
+
+ /* get the last defined gpio line (offset + nb of pins) */
+ npins = args.args[0] + args.args[2];
+ while (!fwnode_property_get_reference_args(fwnode, "gpio-ranges", NULL, 3, ++i, &args))
+ npins = max(npins, (int)(args.args[0] + args.args[2]));
+ } else {
+ bank_nr = pctl->nbanks;
+ bank->gpio_chip.base = bank_nr * STM32_GPIO_PINS_PER_BANK;
+ range->name = bank->gpio_chip.label;
+ range->id = bank_nr;
+ range->pin_base = range->id * STM32_GPIO_PINS_PER_BANK;
+ range->base = range->id * STM32_GPIO_PINS_PER_BANK;
+ range->npins = npins;
+ range->gc = &bank->gpio_chip;
+ pinctrl_add_gpio_range(pctl->pctl_dev,
+ &pctl->banks[bank_nr].range);
+ }
+
+ if (fwnode_property_read_u32(fwnode, "st,bank-ioport", &bank_ioport_nr))
+ bank_ioport_nr = bank_nr;
+
+ bank->gpio_chip.base = bank_nr * STM32_GPIO_PINS_PER_BANK;
+
+ bank->gpio_chip.ngpio = npins;
+ bank->gpio_chip.fwnode = fwnode;
+ bank->gpio_chip.parent = dev;
+ bank->bank_nr = bank_nr;
+ bank->bank_ioport_nr = bank_ioport_nr;
+ bank->secure_control = pctl->match_data->secure_control;
+ spin_lock_init(&bank->lock);
+
+ if (pctl->domain) {
+ /* create irq hierarchical domain */
+ bank->fwnode = fwnode;
+
+ bank->domain = irq_domain_create_hierarchy(pctl->domain, 0, STM32_GPIO_IRQ_LINE,
+ bank->fwnode, &stm32_gpio_domain_ops,
+ bank);
+
+ if (!bank->domain) {
+ err = -ENODEV;
+ goto err_clk;
+ }
+ }
+
+ err = gpiochip_add_data(&bank->gpio_chip, bank);
+ if (err) {
+ dev_err(dev, "Failed to add gpiochip(%d)!\n", bank_nr);
+ goto err_clk;
+ }
+
+ dev_info(dev, "%s bank added\n", bank->gpio_chip.label);
+ return 0;
+
+err_clk:
+ clk_disable_unprepare(bank->clk);
+ return err;
+}
+
+static struct irq_domain *stm32_pctrl_get_irq_domain(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct device_node *parent;
+ struct irq_domain *domain;
+
+ if (!of_find_property(np, "interrupt-parent", NULL))
+ return NULL;
+
+ parent = of_irq_find_parent(np);
+ if (!parent)
+ return ERR_PTR(-ENXIO);
+
+ domain = irq_find_host(parent);
+ of_node_put(parent);
+ if (!domain)
+ /* domain not registered yet */
+ return ERR_PTR(-EPROBE_DEFER);
+
+ return domain;
+}
+
+static int stm32_pctrl_dt_setup_irq(struct platform_device *pdev,
+ struct stm32_pinctrl *pctl)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct device *dev = &pdev->dev;
+ struct regmap *rm;
+ int offset, ret, i;
+ int mask, mask_width;
+
+ pctl->regmap = syscon_regmap_lookup_by_phandle(np, "st,syscfg");
+ if (IS_ERR(pctl->regmap))
+ return PTR_ERR(pctl->regmap);
+
+ rm = pctl->regmap;
+
+ ret = of_property_read_u32_index(np, "st,syscfg", 1, &offset);
+ if (ret)
+ return ret;
+
+ ret = of_property_read_u32_index(np, "st,syscfg", 2, &mask);
+ if (ret)
+ mask = SYSCFG_IRQMUX_MASK;
+
+ mask_width = fls(mask);
+
+ for (i = 0; i < STM32_GPIO_PINS_PER_BANK; i++) {
+ struct reg_field mux;
+
+ mux.reg = offset + (i / 4) * 4;
+ mux.lsb = (i % 4) * mask_width;
+ mux.msb = mux.lsb + mask_width - 1;
+
+ dev_dbg(dev, "irqmux%d: reg:%#x, lsb:%d, msb:%d\n",
+ i, mux.reg, mux.lsb, mux.msb);
+
+ pctl->irqmux[i] = devm_regmap_field_alloc(dev, rm, mux);
+ if (IS_ERR(pctl->irqmux[i]))
+ return PTR_ERR(pctl->irqmux[i]);
+ }
+
+ return 0;
+}
+
+static int stm32_pctrl_build_state(struct platform_device *pdev)
+{
+ struct stm32_pinctrl *pctl = platform_get_drvdata(pdev);
+ int i;
+
+ pctl->ngroups = pctl->npins;
+
+ /* Allocate groups */
+ pctl->groups = devm_kcalloc(&pdev->dev, pctl->ngroups,
+ sizeof(*pctl->groups), GFP_KERNEL);
+ if (!pctl->groups)
+ return -ENOMEM;
+
+ /* We assume that one pin is one group, use pin name as group name. */
+ pctl->grp_names = devm_kcalloc(&pdev->dev, pctl->ngroups,
+ sizeof(*pctl->grp_names), GFP_KERNEL);
+ if (!pctl->grp_names)
+ return -ENOMEM;
+
+ for (i = 0; i < pctl->npins; i++) {
+ const struct stm32_desc_pin *pin = pctl->pins + i;
+ struct stm32_pinctrl_group *group = pctl->groups + i;
+
+ group->name = pin->pin.name;
+ group->pin = pin->pin.number;
+ pctl->grp_names[i] = pin->pin.name;
+ }
+
+ return 0;
+}
+
+static int stm32_pctrl_create_pins_tab(struct stm32_pinctrl *pctl,
+ struct stm32_desc_pin *pins)
+{
+ const struct stm32_desc_pin *p;
+ int i, nb_pins_available = 0;
+
+ for (i = 0; i < pctl->match_data->npins; i++) {
+ p = pctl->match_data->pins + i;
+ if (pctl->pkg && !(pctl->pkg & p->pkg))
+ continue;
+ pins->pin = p->pin;
+ memcpy((struct stm32_desc_pin *)pins->functions, p->functions,
+ STM32_CONFIG_NUM * sizeof(struct stm32_desc_function));
+ pins++;
+ nb_pins_available++;
+ }
+
+ pctl->npins = nb_pins_available;
+
+ return 0;
+}
+
+int stm32_pctl_probe(struct platform_device *pdev)
+{
+ const struct stm32_pinctrl_match_data *match_data;
+ struct fwnode_handle *child;
+ struct device *dev = &pdev->dev;
+ struct stm32_pinctrl *pctl;
+ struct pinctrl_pin_desc *pins;
+ int i, ret, hwlock_id;
+ unsigned int banks;
+
+ match_data = device_get_match_data(dev);
+ if (!match_data)
+ return -EINVAL;
+
+ if (!device_property_present(dev, "pins-are-numbered")) {
+ dev_err(dev, "only support pins-are-numbered format\n");
+ return -EINVAL;
+ }
+
+ pctl = devm_kzalloc(dev, sizeof(*pctl), GFP_KERNEL);
+ if (!pctl)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, pctl);
+
+ /* check for IRQ controller (may require deferred probe) */
+ pctl->domain = stm32_pctrl_get_irq_domain(pdev);
+ if (IS_ERR(pctl->domain))
+ return PTR_ERR(pctl->domain);
+ if (!pctl->domain)
+ dev_warn(dev, "pinctrl without interrupt support\n");
+
+ /* hwspinlock is optional */
+ hwlock_id = of_hwspin_lock_get_id(pdev->dev.of_node, 0);
+ if (hwlock_id < 0) {
+ if (hwlock_id == -EPROBE_DEFER)
+ return hwlock_id;
+ } else {
+ pctl->hwlock = hwspin_lock_request_specific(hwlock_id);
+ }
+
+ spin_lock_init(&pctl->irqmux_lock);
+
+ pctl->dev = dev;
+ pctl->match_data = match_data;
+
+ /* get optional package information */
+ if (!device_property_read_u32(dev, "st,package", &pctl->pkg))
+ dev_dbg(pctl->dev, "package detected: %x\n", pctl->pkg);
+
+ pctl->pins = devm_kcalloc(pctl->dev, pctl->match_data->npins,
+ sizeof(*pctl->pins), GFP_KERNEL);
+ if (!pctl->pins)
+ return -ENOMEM;
+
+ ret = stm32_pctrl_create_pins_tab(pctl, pctl->pins);
+ if (ret)
+ return ret;
+
+ ret = stm32_pctrl_build_state(pdev);
+ if (ret) {
+ dev_err(dev, "build state failed: %d\n", ret);
+ return -EINVAL;
+ }
+
+ if (pctl->domain) {
+ ret = stm32_pctrl_dt_setup_irq(pdev, pctl);
+ if (ret)
+ return ret;
+ }
+
+ pins = devm_kcalloc(&pdev->dev, pctl->npins, sizeof(*pins),
+ GFP_KERNEL);
+ if (!pins)
+ return -ENOMEM;
+
+ for (i = 0; i < pctl->npins; i++)
+ pins[i] = pctl->pins[i].pin;
+
+ pctl->pctl_desc.name = dev_name(&pdev->dev);
+ pctl->pctl_desc.owner = THIS_MODULE;
+ pctl->pctl_desc.pins = pins;
+ pctl->pctl_desc.npins = pctl->npins;
+ pctl->pctl_desc.link_consumers = true;
+ pctl->pctl_desc.confops = &stm32_pconf_ops;
+ pctl->pctl_desc.pctlops = &stm32_pctrl_ops;
+ pctl->pctl_desc.pmxops = &stm32_pmx_ops;
+ pctl->dev = &pdev->dev;
+
+ pctl->pctl_dev = devm_pinctrl_register(&pdev->dev, &pctl->pctl_desc,
+ pctl);
+
+ if (IS_ERR(pctl->pctl_dev)) {
+ dev_err(&pdev->dev, "Failed pinctrl registration\n");
+ return PTR_ERR(pctl->pctl_dev);
+ }
+
+ banks = gpiochip_node_count(dev);
+ if (!banks) {
+ dev_err(dev, "at least one GPIO bank is required\n");
+ return -EINVAL;
+ }
+ pctl->banks = devm_kcalloc(dev, banks, sizeof(*pctl->banks),
+ GFP_KERNEL);
+ if (!pctl->banks)
+ return -ENOMEM;
+
+ i = 0;
+ for_each_gpiochip_node(dev, child) {
+ struct stm32_gpio_bank *bank = &pctl->banks[i];
+ struct device_node *np = to_of_node(child);
+
+ bank->rstc = of_reset_control_get_exclusive(np, NULL);
+ if (PTR_ERR(bank->rstc) == -EPROBE_DEFER) {
+ fwnode_handle_put(child);
+ return -EPROBE_DEFER;
+ }
+
+ bank->clk = of_clk_get_by_name(np, NULL);
+ if (IS_ERR(bank->clk)) {
+ fwnode_handle_put(child);
+ return dev_err_probe(dev, PTR_ERR(bank->clk),
+ "failed to get clk\n");
+ }
+ i++;
+ }
+
+ for_each_gpiochip_node(dev, child) {
+ ret = stm32_gpiolib_register_bank(pctl, child);
+ if (ret) {
+ fwnode_handle_put(child);
+
+ for (i = 0; i < pctl->nbanks; i++)
+ clk_disable_unprepare(pctl->banks[i].clk);
+
+ return ret;
+ }
+
+ pctl->nbanks++;
+ }
+
+ dev_info(dev, "Pinctrl STM32 initialized\n");
+
+ return 0;
+}
+
+static int __maybe_unused stm32_pinctrl_restore_gpio_regs(
+ struct stm32_pinctrl *pctl, u32 pin)
+{
+ const struct pin_desc *desc = pin_desc_get(pctl->pctl_dev, pin);
+ u32 val, alt, mode, offset = stm32_gpio_pin(pin);
+ struct pinctrl_gpio_range *range;
+ struct stm32_gpio_bank *bank;
+ bool pin_is_irq;
+ int ret;
+
+ range = pinctrl_find_gpio_range_from_pin(pctl->pctl_dev, pin);
+ if (!range)
+ return 0;
+
+ if (!gpiochip_line_is_valid(range->gc, offset))
+ return 0;
+
+ pin_is_irq = gpiochip_line_is_irq(range->gc, offset);
+
+ if (!desc || (!pin_is_irq && !desc->gpio_owner))
+ return 0;
+
+ bank = gpiochip_get_data(range->gc);
+
+ alt = bank->pin_backup[offset] & STM32_GPIO_BKP_ALT_MASK;
+ alt >>= STM32_GPIO_BKP_ALT_SHIFT;
+ mode = bank->pin_backup[offset] & STM32_GPIO_BKP_MODE_MASK;
+ mode >>= STM32_GPIO_BKP_MODE_SHIFT;
+
+ ret = stm32_pmx_set_mode(bank, offset, mode, alt);
+ if (ret)
+ return ret;
+
+ if (mode == 1) {
+ val = bank->pin_backup[offset] & BIT(STM32_GPIO_BKP_VAL);
+ val = val >> STM32_GPIO_BKP_VAL;
+ __stm32_gpio_set(bank, offset, val);
+ }
+
+ val = bank->pin_backup[offset] & BIT(STM32_GPIO_BKP_TYPE);
+ val >>= STM32_GPIO_BKP_TYPE;
+ ret = stm32_pconf_set_driving(bank, offset, val);
+ if (ret)
+ return ret;
+
+ val = bank->pin_backup[offset] & STM32_GPIO_BKP_SPEED_MASK;
+ val >>= STM32_GPIO_BKP_SPEED_SHIFT;
+ ret = stm32_pconf_set_speed(bank, offset, val);
+ if (ret)
+ return ret;
+
+ val = bank->pin_backup[offset] & STM32_GPIO_BKP_PUPD_MASK;
+ val >>= STM32_GPIO_BKP_PUPD_SHIFT;
+ ret = stm32_pconf_set_bias(bank, offset, val);
+ if (ret)
+ return ret;
+
+ if (pin_is_irq)
+ regmap_field_write(pctl->irqmux[offset], bank->bank_ioport_nr);
+
+ return 0;
+}
+
+int __maybe_unused stm32_pinctrl_suspend(struct device *dev)
+{
+ struct stm32_pinctrl *pctl = dev_get_drvdata(dev);
+ int i;
+
+ for (i = 0; i < pctl->nbanks; i++)
+ clk_disable(pctl->banks[i].clk);
+
+ return 0;
+}
+
+int __maybe_unused stm32_pinctrl_resume(struct device *dev)
+{
+ struct stm32_pinctrl *pctl = dev_get_drvdata(dev);
+ struct stm32_pinctrl_group *g = pctl->groups;
+ int i;
+
+ for (i = 0; i < pctl->nbanks; i++)
+ clk_enable(pctl->banks[i].clk);
+
+ for (i = 0; i < pctl->ngroups; i++, g++)
+ stm32_pinctrl_restore_gpio_regs(pctl, g->pin);
+
+ return 0;
+}