diff options
| author | Dong Aisheng <dong.aisheng@linaro.org> | 2012-04-25 19:38:13 +0800 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2012-05-02 01:14:20 +0200 |
| commit | 4650b7cbea4db73f459181f67f939b510e3a17b2 (patch) | |
| tree | 45f277ce5f3b79241091914be30a5c2d1288ee1f /drivers/pinctrl | |
| parent | 5b3aa5f7c6287b1a0698950a91e94546888e553b (diff) | |
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 <dong.aisheng@linaro.org>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl')
| -rw-r--r-- | 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 a6386b3a3c15..c3b331b74fa0 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 */ |