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Commit a3d39568 authored by Can Guo's avatar Can Guo
Browse files

extcon: gpio: update power management operations 



During system resume, other subsystem may need to get the extcon state to
decide if a hotplug device is present. So we need to make sure the extcon
gpio device resumes early and update its state in a sync way.

Change-Id: Id5c4e8c8c7e9196fea8fa8eecb42dfb4914aeb7b
Signed-off-by: default avatarCan Guo <cang@codeaurora.org>
parent b53cdddc

drivers/extcon/extcon-gpio.c

+21 −7
Original line number Diff line number Diff line
@@ -178,6 +178,8 @@ static int gpio_extcon_probe(struct platform_device *pdev) 
	if (data->irq <= 0)

		return data->irq;



	data->check_on_resume = true;



	data->supported_cable = devm_kzalloc(dev,

					     sizeof(*data->supported_cable) * 2,

					     GFP_KERNEL);
@@ -229,17 +231,29 @@ static int gpio_extcon_remove(struct platform_device *pdev) 
static int gpio_extcon_resume(struct device *dev)

{

	struct gpio_extcon_data *data;

	int state, ret = 0;



	data = dev_get_drvdata(dev);

	if (data->check_on_resume)

		queue_delayed_work(system_power_efficient_wq,

			&data->work, data->debounce_jiffies);

	if (data->check_on_resume) {

		state = gpiod_get_value_cansleep(data->gpiod);

		ret = extcon_set_state_sync(data->edev, data->extcon_id, state);

		if (ret)

			dev_err(dev, "%s: Failed to set extcon gpio state\n",

					__func__);

	}



	return 0;

	return ret;

}

#endif



static SIMPLE_DEV_PM_OPS(gpio_extcon_pm_ops, NULL, gpio_extcon_resume);

static const struct dev_pm_ops gpio_extcon_pm_ops = {

	SET_LATE_SYSTEM_SLEEP_PM_OPS(NULL, gpio_extcon_resume)

};



#define EXTCON_GPIO_PMOPS (&gpio_extcon_pm_ops)



#else

#define EXTCON_GPIO_PMOPS NULL

#endif



static const struct of_device_id extcon_gpio_of_match[] = {

	{ .compatible = "extcon-gpio"},
@@ -251,7 +265,7 @@ static struct platform_driver gpio_extcon_driver = { 
	.remove		= gpio_extcon_remove,

	.driver		= {

		.name	= "extcon-gpio",

		.pm	= &gpio_extcon_pm_ops,

		.pm	= EXTCON_GPIO_PMOPS,

		.of_match_table = of_match_ptr(extcon_gpio_of_match),

	},

};