diff options
| author | Etienne Carriere <etienne.carriere@st.com> | 2020-06-15 15:54:07 +0300 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2020-06-21 00:05:18 +0300 |
| commit | 2254e77665d5af6186781319d8bc109ba03008c1 (patch) | |
| tree | aea0a10996b4b7ade720bb73eef20a6cd4202830 /drivers/pinctrl/stm32 | |
| parent | d888229ef2fbc9557cbf953fa8e2687550f5308b (diff) | |
| download | linux-2254e77665d5af6186781319d8bc109ba03008c1.tar.xz | |
pinctrl: stm32: defer probe if reset resource is not yet ready
Defer probe when pin controller reset is defined in the system resources
but not yet probed.
Signed-off-by: Etienne Carriere <etienne.carriere@st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>
Link: https://lore.kernel.org/r/20200615125407.27632-3-alexandre.torgue@st.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/stm32')
| -rw-r--r-- | drivers/pinctrl/stm32/pinctrl-stm32.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/pinctrl/stm32/pinctrl-stm32.c b/drivers/pinctrl/stm32/pinctrl-stm32.c index c15460ef2307..162535e7c94d 100644 --- a/drivers/pinctrl/stm32/pinctrl-stm32.c +++ b/drivers/pinctrl/stm32/pinctrl-stm32.c @@ -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) |