diff options
| author | Rongjun Ying <rongjun.ying@csr.com> | 2014-01-09 09:50:13 +0900 |
|---|---|---|
| committer | Chanwoo Choi <cw00.choi@samsung.com> | 2014-01-09 09:53:30 +0900 |
| commit | 6544dfa5795060b01042fd62fd1a92e18c2fc485 (patch) | |
| tree | a5f3f3b261e820aeb7ee703e80ca2a68805f3947 | |
| parent | 962e56bfcf0b055d00fc52948a327dead904caa3 (diff) | |
| download | lwn-6544dfa5795060b01042fd62fd1a92e18c2fc485.tar.gz lwn-6544dfa5795060b01042fd62fd1a92e18c2fc485.zip | |
extcon: gpio: Add power resume support
When system on the suspend state, Some SoC can't get gpio interrupt.
After system resume, need send extcon uevent to userspace.
Signed-off-by: Rongjun Ying <rongjun.ying@csr.com>
Reviewed-by: Barry Song <Baohua.Song@csr.com>
Acked-by: Myungjoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
| -rw-r--r-- | drivers/extcon/extcon-gpio.c | 21 | ||||
| -rw-r--r-- | include/linux/extcon/extcon-gpio.h | 1 |
2 files changed, 22 insertions, 0 deletions
diff --git a/drivers/extcon/extcon-gpio.c b/drivers/extcon/extcon-gpio.c index 4736a9c57efa..a63a6b21c9ad 100644 --- a/drivers/extcon/extcon-gpio.c +++ b/drivers/extcon/extcon-gpio.c @@ -40,6 +40,7 @@ struct gpio_extcon_data { int irq; struct delayed_work work; unsigned long debounce_jiffies; + bool check_on_resume; }; static void gpio_extcon_work(struct work_struct *work) @@ -103,6 +104,7 @@ static int gpio_extcon_probe(struct platform_device *pdev) extcon_data->gpio_active_low = pdata->gpio_active_low; extcon_data->state_on = pdata->state_on; extcon_data->state_off = pdata->state_off; + extcon_data->check_on_resume = pdata->check_on_resume; if (pdata->state_on && pdata->state_off) extcon_data->edev.print_state = extcon_gpio_print_state; @@ -160,12 +162,31 @@ static int gpio_extcon_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_PM_SLEEP +static int gpio_extcon_resume(struct device *dev) +{ + struct gpio_extcon_data *extcon_data; + + extcon_data = dev_get_drvdata(dev); + if (extcon_data->check_on_resume) + queue_delayed_work(system_power_efficient_wq, + &extcon_data->work, extcon_data->debounce_jiffies); + + return 0; +} +#endif + +static const struct dev_pm_ops gpio_extcon_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(NULL, gpio_extcon_resume) +}; + static struct platform_driver gpio_extcon_driver = { .probe = gpio_extcon_probe, .remove = gpio_extcon_remove, .driver = { .name = "extcon-gpio", .owner = THIS_MODULE, + .pm = &gpio_extcon_pm_ops, }, }; diff --git a/include/linux/extcon/extcon-gpio.h b/include/linux/extcon/extcon-gpio.h index 4195810f87fe..8900fdf511c6 100644 --- a/include/linux/extcon/extcon-gpio.h +++ b/include/linux/extcon/extcon-gpio.h @@ -51,6 +51,7 @@ struct gpio_extcon_platform_data { /* if NULL, "0" or "1" will be printed */ const char *state_on; const char *state_off; + bool check_on_resume; }; #endif /* __EXTCON_GPIO_H__ */ |