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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>
hifive-unleashed-5.1
Rongjun Ying 2014-01-09 09:50:13 +09:00 committed by Chanwoo Choi
parent 962e56bfcf
commit 6544dfa579
2 changed files with 22 additions and 0 deletions
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21
drivers/extcon/extcon-gpio.c
View File

@ -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,
},
};

1
include/linux/extcon/extcon-gpio.h
View File

@ -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__ */