pinctrl: stm32: defer probe if reset resource is not yet ready (2254e776) · Commits · 戴 / test

drivers/pinctrl/stm32/pinctrl-stm32.c

+8 −4

Original line number	Diff line number	Diff line
		@@ -84,6 +84,7 @@ struct stm32_pinctrl_group {
		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;
		@@ -1202,13 +1203,11 @@ static int stm32_gpiolib_register_bank(struct stm32_pinctrl *pctl,
		struct of_phandle_args args;
		struct device *dev = pctl->dev;
		struct resource res;
		struct reset_control *rstc;
		int npins = STM32_GPIO_PINS_PER_BANK;
		int bank_nr, err;

		rstc = of_reset_control_get_exclusive(np, NULL);
		if (!IS_ERR(rstc))
		reset_control_deassert(rstc);
		if (!IS_ERR(bank->rstc))
		reset_control_deassert(bank->rstc);

		if (of_address_to_resource(np, 0, &res))
		return -ENODEV;
		@@ -1516,6 +1515,11 @@ int stm32_pctl_probe(struct platform_device *pdev)
		struct stm32_gpio_bank *bank = &pctl->banks[i];

		if (of_property_read_bool(child, "gpio-controller")) {
		bank->rstc = of_reset_control_get_exclusive(child,
		NULL);
		if (PTR_ERR(bank->rstc) == -EPROBE_DEFER)
		return -EPROBE_DEFER;

		bank->clk = of_clk_get_by_name(child, NULL);
		if (IS_ERR(bank->clk)) {
		if (PTR_ERR(bank->clk) != -EPROBE_DEFER)