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Commit 6544dfa5 authored by Rongjun Ying's avatar Rongjun Ying Committed by Chanwoo Choi
Browse files

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: default avatarRongjun Ying <rongjun.ying@csr.com>
Reviewed-by: default avatarBarry Song <Baohua.Song@csr.com>
Acked-by: default avatarMyungjoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: default avatarChanwoo Choi <cw00.choi@samsung.com>
parent 962e56bf

drivers/extcon/extcon-gpio.c

+21 −0
Original line number Diff line number Diff line
@@ -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,

	},

};

include/linux/extcon/extcon-gpio.h

+1 −0
Original line number Diff line number Diff line
@@ -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__ */