Messages in this thread Patch in this message | | | From | Dong Aisheng <> | Subject | [PATCH 1/2] pinctrl: support gpio request deferred probing | Date | Wed, 25 Apr 2012 19:38:13 +0800 |
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From: Dong Aisheng <dong.aisheng@linaro.org>
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 <dong.aisheng@linaro.org> --- drivers/pinctrl/core.c | 7 ++++--- 1 files changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c index 5cd5a5a..ea2412a 100644 --- a/drivers/pinctrl/core.c +++ b/drivers/pinctrl/core.c @@ -276,7 +276,8 @@ 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, @@ -296,7 +297,7 @@ static int pinctrl_get_device_gpio_range(unsigned gpio, } } - return -EINVAL; + return -EPROBE_DEFER; } /** @@ -382,7 +383,7 @@ 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 */ -- 1.7.0.4
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