diff options
Diffstat (limited to 'drivers/pinctrl/stm32/pinctrl-stm32.c')
| -rw-r--r-- | drivers/pinctrl/stm32/pinctrl-stm32.c | 274 |
1 files changed, 165 insertions, 109 deletions
diff --git a/drivers/pinctrl/stm32/pinctrl-stm32.c b/drivers/pinctrl/stm32/pinctrl-stm32.c index f7c9459f6628..57a33fb0f2d7 100644 --- a/drivers/pinctrl/stm32/pinctrl-stm32.c +++ b/drivers/pinctrl/stm32/pinctrl-stm32.c @@ -24,6 +24,7 @@ #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> @@ -43,6 +44,7 @@ #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 @@ -94,6 +96,7 @@ struct stm32_gpio_bank { 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 { @@ -197,11 +200,7 @@ static inline void __stm32_gpio_set(struct stm32_gpio_bank *bank, if (!value) offset += STM32_GPIO_PINS_PER_BANK; - clk_enable(bank->clk); - writel_relaxed(BIT(offset), bank->base + STM32_GPIO_BSRR); - - clk_disable(bank->clk); } static int stm32_gpio_request(struct gpio_chip *chip, unsigned offset) @@ -225,25 +224,11 @@ static void stm32_gpio_free(struct gpio_chip *chip, unsigned offset) pinctrl_gpio_free(chip->base + offset); } -static int stm32_gpio_get_noclk(struct gpio_chip *chip, unsigned int offset) -{ - struct stm32_gpio_bank *bank = gpiochip_get_data(chip); - - return !!(readl_relaxed(bank->base + STM32_GPIO_IDR) & BIT(offset)); -} - static int stm32_gpio_get(struct gpio_chip *chip, unsigned offset) { struct stm32_gpio_bank *bank = gpiochip_get_data(chip); - int ret; - - clk_enable(bank->clk); - - ret = stm32_gpio_get_noclk(chip, offset); - - clk_disable(bank->clk); - return ret; + return !!(readl_relaxed(bank->base + STM32_GPIO_IDR) & BIT(offset)); } static void stm32_gpio_set(struct gpio_chip *chip, unsigned offset, int value) @@ -301,6 +286,33 @@ static int stm32_gpio_get_direction(struct gpio_chip *chip, unsigned int offset) 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, @@ -311,6 +323,7 @@ static const struct gpio_chip stm32_gpio_template = { .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) @@ -323,7 +336,7 @@ static void stm32_gpio_irq_trigger(struct irq_data *d) return; /* If level interrupt type then retrig */ - level = stm32_gpio_get_noclk(&bank->gpio_chip, d->hwirq); + 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); @@ -365,7 +378,6 @@ 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); - unsigned long flags; int ret; ret = stm32_gpio_direction_input(&bank->gpio_chip, irq_data->hwirq); @@ -379,10 +391,6 @@ static int stm32_gpio_irq_request_resources(struct irq_data *irq_data) return ret; } - flags = irqd_get_trigger_type(irq_data); - if (flags & IRQ_TYPE_LEVEL_MASK) - clk_enable(bank->clk); - return 0; } @@ -390,9 +398,6 @@ static void stm32_gpio_irq_release_resources(struct irq_data *irq_data) { struct stm32_gpio_bank *bank = irq_data->domain->host_data; - if (bank->irq_type[irq_data->hwirq] & IRQ_TYPE_LEVEL_MASK) - clk_disable(bank->clk); - gpiochip_unlock_as_irq(&bank->gpio_chip, irq_data->hwirq); } @@ -533,7 +538,7 @@ stm32_pctrl_find_group_by_pin(struct stm32_pinctrl *pctl, u32 pin) static bool stm32_pctrl_is_function_valid(struct stm32_pinctrl *pctl, u32 pin_num, u32 fnum) { - int i; + int i, k; for (i = 0; i < pctl->npins; i++) { const struct stm32_desc_pin *pin = pctl->pins + i; @@ -542,7 +547,7 @@ static bool stm32_pctrl_is_function_valid(struct stm32_pinctrl *pctl, if (pin->pin.number != pin_num) continue; - while (func && func->name) { + for (k = 0; k < STM32_CONFIG_NUM; k++) { if (func->num == fnum) return true; func++; @@ -769,7 +774,6 @@ static int stm32_pmx_set_mode(struct stm32_gpio_bank *bank, unsigned long flags; int err = 0; - clk_enable(bank->clk); spin_lock_irqsave(&bank->lock, flags); if (pctl->hwlock) { @@ -798,7 +802,6 @@ static int stm32_pmx_set_mode(struct stm32_gpio_bank *bank, unlock: spin_unlock_irqrestore(&bank->lock, flags); - clk_disable(bank->clk); return err; } @@ -811,7 +814,6 @@ void stm32_pmx_get_mode(struct stm32_gpio_bank *bank, int pin, u32 *mode, int alt_offset = STM32_GPIO_AFRL + (pin / 8) * 4; unsigned long flags; - clk_enable(bank->clk); spin_lock_irqsave(&bank->lock, flags); val = readl_relaxed(bank->base + alt_offset); @@ -823,7 +825,6 @@ void stm32_pmx_get_mode(struct stm32_gpio_bank *bank, int pin, u32 *mode, *mode = val >> (pin * 2); spin_unlock_irqrestore(&bank->lock, flags); - clk_disable(bank->clk); } static int stm32_pmx_set_mux(struct pinctrl_dev *pctldev, @@ -867,12 +868,32 @@ static int stm32_pmx_gpio_set_direction(struct pinctrl_dev *pctldev, 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, }; @@ -886,7 +907,6 @@ static int stm32_pconf_set_driving(struct stm32_gpio_bank *bank, u32 val; int err = 0; - clk_enable(bank->clk); spin_lock_irqsave(&bank->lock, flags); if (pctl->hwlock) { @@ -910,7 +930,6 @@ static int stm32_pconf_set_driving(struct stm32_gpio_bank *bank, unlock: spin_unlock_irqrestore(&bank->lock, flags); - clk_disable(bank->clk); return err; } @@ -921,14 +940,12 @@ static u32 stm32_pconf_get_driving(struct stm32_gpio_bank *bank, unsigned long flags; u32 val; - clk_enable(bank->clk); spin_lock_irqsave(&bank->lock, flags); val = readl_relaxed(bank->base + STM32_GPIO_TYPER); val &= BIT(offset); spin_unlock_irqrestore(&bank->lock, flags); - clk_disable(bank->clk); return (val >> offset); } @@ -941,7 +958,6 @@ static int stm32_pconf_set_speed(struct stm32_gpio_bank *bank, u32 val; int err = 0; - clk_enable(bank->clk); spin_lock_irqsave(&bank->lock, flags); if (pctl->hwlock) { @@ -965,7 +981,6 @@ static int stm32_pconf_set_speed(struct stm32_gpio_bank *bank, unlock: spin_unlock_irqrestore(&bank->lock, flags); - clk_disable(bank->clk); return err; } @@ -976,14 +991,12 @@ static u32 stm32_pconf_get_speed(struct stm32_gpio_bank *bank, unsigned long flags; u32 val; - clk_enable(bank->clk); 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); - clk_disable(bank->clk); return (val >> (offset * 2)); } @@ -996,7 +1009,6 @@ static int stm32_pconf_set_bias(struct stm32_gpio_bank *bank, u32 val; int err = 0; - clk_enable(bank->clk); spin_lock_irqsave(&bank->lock, flags); if (pctl->hwlock) { @@ -1020,7 +1032,6 @@ static int stm32_pconf_set_bias(struct stm32_gpio_bank *bank, unlock: spin_unlock_irqrestore(&bank->lock, flags); - clk_disable(bank->clk); return err; } @@ -1031,14 +1042,12 @@ static u32 stm32_pconf_get_bias(struct stm32_gpio_bank *bank, unsigned long flags; u32 val; - clk_enable(bank->clk); 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); - clk_disable(bank->clk); return (val >> (offset * 2)); } @@ -1049,7 +1058,6 @@ static bool stm32_pconf_get(struct stm32_gpio_bank *bank, unsigned long flags; u32 val; - clk_enable(bank->clk); spin_lock_irqsave(&bank->lock, flags); if (dir) @@ -1060,7 +1068,6 @@ static bool stm32_pconf_get(struct stm32_gpio_bank *bank, BIT(offset)); spin_unlock_irqrestore(&bank->lock, flags); - clk_disable(bank->clk); return val; } @@ -1083,6 +1090,11 @@ static int stm32_pconf_parse_conf(struct pinctrl_dev *pctldev, 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); @@ -1162,10 +1174,27 @@ static int stm32_pconf_set(struct pinctrl_dev *pctldev, unsigned int pin, 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; @@ -1185,6 +1214,11 @@ static void stm32_pconf_dbg_show(struct pinctrl_dev *pctldev, 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); @@ -1215,7 +1249,12 @@ static void stm32_pconf_dbg_show(struct pinctrl_dev *pctldev, case 2: drive = stm32_pconf_get_driving(bank, offset); speed = stm32_pconf_get_speed(bank, offset); - seq_printf(s, "%d - %s - %s - %s %s", alt, + 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"); @@ -1234,13 +1273,12 @@ static const struct pinconf_ops stm32_pconf_ops = { .pin_config_dbg_show = stm32_pconf_dbg_show, }; -static int stm32_gpiolib_register_bank(struct stm32_pinctrl *pctl, - struct device_node *np) +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 of_phandle_args args; + struct fwnode_reference_args args; struct device *dev = pctl->dev; struct resource res; int npins = STM32_GPIO_PINS_PER_BANK; @@ -1249,30 +1287,30 @@ static int stm32_gpiolib_register_bank(struct stm32_pinctrl *pctl, if (!IS_ERR(bank->rstc)) reset_control_deassert(bank->rstc); - if (of_address_to_resource(np, 0, &res)) + 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(bank->clk); + err = clk_prepare_enable(bank->clk); if (err) { - dev_err(dev, "failed to prepare clk (%d)\n", err); + dev_err(dev, "failed to prepare_enable clk (%d)\n", err); return err; } bank->gpio_chip = stm32_gpio_template; - of_property_read_string(np, "st,bank-name", &bank->gpio_chip.label); + fwnode_property_read_string(fwnode, "st,bank-name", &bank->gpio_chip.label); - if (!of_parse_phandle_with_fixed_args(np, "gpio-ranges", 3, i, &args)) { + 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 (!of_parse_phandle_with_fixed_args(np, "gpio-ranges", 3, ++i, &args)) + 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; @@ -1287,40 +1325,48 @@ static int stm32_gpiolib_register_bank(struct stm32_pinctrl *pctl, &pctl->banks[bank_nr].range); } - if (of_property_read_u32(np, "st,bank-ioport", &bank_ioport_nr)) + 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.of_node = np; + 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); /* create irq hierarchical domain */ - bank->fwnode = of_node_to_fwnode(np); + 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) - return -ENODEV; + 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); - return err; + 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 device_node *np) +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; @@ -1424,7 +1470,8 @@ static int stm32_pctrl_create_pins_tab(struct stm32_pinctrl *pctl, if (pctl->pkg && !(pctl->pkg & p->pkg)) continue; pins->pin = p->pin; - pins->functions = p->functions; + memcpy((struct stm32_desc_pin *)pins->functions, p->functions, + STM32_CONFIG_NUM * sizeof(struct stm32_desc_function)); pins++; nb_pins_available++; } @@ -1436,22 +1483,19 @@ static int stm32_pctrl_create_pins_tab(struct stm32_pinctrl *pctl, int stm32_pctl_probe(struct platform_device *pdev) { - struct device_node *np = pdev->dev.of_node; - struct device_node *child; - const struct of_device_id *match; + 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, banks = 0; + int i, ret, hwlock_id; + unsigned int banks; - if (!np) + match_data = device_get_match_data(dev); + if (!match_data) return -EINVAL; - match = of_match_device(dev->driver->of_match_table, dev); - if (!match || !match->data) - return -EINVAL; - - if (!of_find_property(np, "pins-are-numbered", NULL)) { + if (!device_property_present(dev, "pins-are-numbered")) { dev_err(dev, "only support pins-are-numbered format\n"); return -EINVAL; } @@ -1463,7 +1507,7 @@ int stm32_pctl_probe(struct platform_device *pdev) platform_set_drvdata(pdev, pctl); /* check for IRQ controller (may require deferred probe) */ - pctl->domain = stm32_pctrl_get_irq_domain(np); + pctl->domain = stm32_pctrl_get_irq_domain(pdev); if (IS_ERR(pctl->domain)) return PTR_ERR(pctl->domain); @@ -1479,10 +1523,10 @@ int stm32_pctl_probe(struct platform_device *pdev) spin_lock_init(&pctl->irqmux_lock); pctl->dev = dev; - pctl->match_data = match->data; + pctl->match_data = match_data; /* get optional package information */ - if (!of_property_read_u32(np, "st,package", &pctl->pkg)) + 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, @@ -1532,10 +1576,7 @@ int stm32_pctl_probe(struct platform_device *pdev) return PTR_ERR(pctl->pctl_dev); } - for_each_available_child_of_node(np, child) - if (of_property_read_bool(child, "gpio-controller")) - banks++; - + banks = gpiochip_node_count(dev); if (!banks) { dev_err(dev, "at least one GPIO bank is required\n"); return -EINVAL; @@ -1546,40 +1587,38 @@ int stm32_pctl_probe(struct platform_device *pdev) return -ENOMEM; i = 0; - for_each_available_child_of_node(np, child) { + for_each_gpiochip_node(dev, child) { struct stm32_gpio_bank *bank = &pctl->banks[i]; + struct device_node *np = to_of_node(child); - if (of_property_read_bool(child, "gpio-controller")) { - bank->rstc = of_reset_control_get_exclusive(child, - NULL); - if (PTR_ERR(bank->rstc) == -EPROBE_DEFER) { - of_node_put(child); - return -EPROBE_DEFER; - } + 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(child, NULL); - if (IS_ERR(bank->clk)) { - if (PTR_ERR(bank->clk) != -EPROBE_DEFER) - dev_err(dev, - "failed to get clk (%ld)\n", - PTR_ERR(bank->clk)); - of_node_put(child); - return PTR_ERR(bank->clk); - } - i++; + bank->clk = of_clk_get_by_name(np, NULL); + if (IS_ERR(bank->clk)) { + if (PTR_ERR(bank->clk) != -EPROBE_DEFER) + dev_err(dev, "failed to get clk (%ld)\n", PTR_ERR(bank->clk)); + fwnode_handle_put(child); + return PTR_ERR(bank->clk); } + i++; } - for_each_available_child_of_node(np, child) { - if (of_property_read_bool(child, "gpio-controller")) { - ret = stm32_gpiolib_register_bank(pctl, child); - if (ret) { - of_node_put(child); - return ret; - } + 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); - pctl->nbanks++; + return ret; } + + pctl->nbanks++; } dev_info(dev, "Pinctrl STM32 initialized\n"); @@ -1601,6 +1640,9 @@ static int __maybe_unused stm32_pinctrl_restore_gpio_regs( 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)) @@ -1647,12 +1689,26 @@ static int __maybe_unused stm32_pinctrl_restore_gpio_regs( 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); |