[PATCH] pinctrl: samsung: Calculate GPIO base for pinctrl_add_gpio_range

From: Charles Keepax
Date: Thu Feb 23 2017 - 12:57:31 EST

As the pinctrl is now added before the GPIOs are registered we need to
manually calculate what the GPIO base will be, otherwise the base for
each gpio_range will be set to zero. Fortunately the driver
already assigns a GPIO base, in samsung_gpiolib_register, and uses the
same calculation it does for the pin_base. Meaning the two will always
be the same and allowing us to reuse the pinbase and avoid the issue.

Signed-off-by: Charles Keepax <ckeepax@xxxxxxxxxxxxxxxxxxxxxxxxxxx>

Ok I might have spoken to soon there looks like there is a simple
way to fix this up, at least in this case. It would be much more
of an issue if the driver allocated its GPIO base dynamically.


drivers/pinctrl/samsung/pinctrl-samsung.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pinctrl/samsung/pinctrl-samsung.c b/drivers/pinctrl/samsung/pinctrl-samsung.c
index ddc8d6b..864d8b4d 100644
--- a/drivers/pinctrl/samsung/pinctrl-samsung.c
+++ b/drivers/pinctrl/samsung/pinctrl-samsung.c
@@ -882,7 +882,7 @@ static int samsung_pinctrl_register(struct platform_device *pdev,
pin_bank->grange.id = bank;
pin_bank->grange.pin_base = drvdata->pin_base
+ pin_bank->pin_base;
- pin_bank->grange.base = pin_bank->gpio_chip.base;
+ pin_bank->grange.base = pin_bank->grange.pin_base;
pin_bank->grange.npins = pin_bank->gpio_chip.ngpio;
pin_bank->grange.gc = &pin_bank->gpio_chip;
pinctrl_add_gpio_range(drvdata->pctl_dev, &pin_bank->grange);