From: Dong Aisheng Date: Wed, 25 Apr 2012 11:38:13 +0000 (+0800) Subject: pinctrl: support gpio request deferred probing X-Git-Tag: accepted/tizen/common/20141203.182822~4617^2~15 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=4650b7cbea4db73f459181f67f939b510e3a17b2;p=platform%2Fkernel%2Flinux-arm64.git pinctrl: support gpio request deferred probing As pinctrl handles, it may be possible the pinctrl gpio ranges are still not got registered when user call pinctrl_gpio_request. Thus, add defer support for it too. Signed-off-by: Dong Aisheng Acked-by: Stephen Warren Signed-off-by: Linus Walleij --- diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c index a6386b3..c3b331b 100644 --- a/drivers/pinctrl/core.c +++ b/drivers/pinctrl/core.c @@ -291,7 +291,8 @@ pinctrl_match_gpio_range(struct pinctrl_dev *pctldev, unsigned gpio) * * Find the pin controller handling a certain GPIO pin from the pinspace of * the GPIO subsystem, return the device and the matching GPIO range. Returns - * negative if the GPIO range could not be found in any device. + * -EPROBE_DEFER if the GPIO range could not be found in any device since it + * may still have not been registered. */ static int pinctrl_get_device_gpio_range(unsigned gpio, struct pinctrl_dev **outdev, @@ -311,7 +312,7 @@ static int pinctrl_get_device_gpio_range(unsigned gpio, } } - return -EINVAL; + return -EPROBE_DEFER; } /** @@ -397,7 +398,7 @@ int pinctrl_request_gpio(unsigned gpio) ret = pinctrl_get_device_gpio_range(gpio, &pctldev, &range); if (ret) { mutex_unlock(&pinctrl_mutex); - return -EINVAL; + return ret; } /* Convert to the pin controllers number space */