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Commit e15b0213 authored by Anti Sullin's avatar Anti Sullin Committed by Dmitry Torokhov
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Input: gpio-keys - add suspend/resume support 



This patch adds suspend/resume support and enables wakeup from
gpio_keys buttons.

Signed-off-by: default avatarAnti Sullin <anti.sullin@artecdesign.ee>
Signed-off-by: default avatarDmitry Torokhov <dtor@mail.ru>
parent 006df302

drivers/input/keyboard/gpio_keys.c

+52 −0
Original line number Diff line number Diff line
@@ -55,6 +55,7 @@ static int __devinit gpio_keys_probe(struct platform_device *pdev) 
	struct gpio_keys_platform_data *pdata = pdev->dev.platform_data;

	struct input_dev *input;

	int i, error;

	int wakeup = 0;



	input = input_allocate_device();

	if (!input)
@@ -100,6 +101,9 @@ static int __devinit gpio_keys_probe(struct platform_device *pdev) 
			goto fail;

		}



		if (button->wakeup)

			wakeup = 1;



		input_set_capability(input, type, button->code);

	}
@@ -111,6 +115,8 @@ static int __devinit gpio_keys_probe(struct platform_device *pdev) 
		goto fail;

	}



	device_init_wakeup(&pdev->dev, wakeup);



	return 0;



 fail:
@@ -129,6 +135,8 @@ static int __devexit gpio_keys_remove(struct platform_device *pdev) 
	struct input_dev *input = platform_get_drvdata(pdev);

	int i;



	device_init_wakeup(&pdev->dev, 0);



	for (i = 0; i < pdata->nbuttons; i++) {

		int irq = gpio_to_irq(pdata->buttons[i].gpio);

		free_irq(irq, pdev);
@@ -139,9 +147,53 @@ static int __devexit gpio_keys_remove(struct platform_device *pdev) 
	return 0;

}





#ifdef CONFIG_PM

static int gpio_keys_suspend(struct platform_device *pdev, pm_message_t state)

{

	struct gpio_keys_platform_data *pdata = pdev->dev.platform_data;

	int i;



	if (device_may_wakeup(&pdev->dev)) {

		for (i = 0; i < pdata->nbuttons; i++) {

			struct gpio_keys_button *button = &pdata->buttons[i];

			if (button->wakeup) {

				int irq = gpio_to_irq(button->gpio);

				enable_irq_wake(irq);

			}

		}

	}



	return 0;

}



static int gpio_keys_resume(struct platform_device *pdev)

{

	struct gpio_keys_platform_data *pdata = pdev->dev.platform_data;

	int i;



	if (device_may_wakeup(&pdev->dev)) {

		for (i = 0; i < pdata->nbuttons; i++) {

			struct gpio_keys_button *button = &pdata->buttons[i];

			if (button->wakeup) {

				int irq = gpio_to_irq(button->gpio);

				disable_irq_wake(irq);

			}

		}

	}



	return 0;

}

#else

#define gpio_keys_suspend	NULL

#define gpio_keys_resume	NULL

#endif



struct platform_driver gpio_keys_device_driver = {

	.probe		= gpio_keys_probe,

	.remove		= __devexit_p(gpio_keys_remove),

	.suspend	= gpio_keys_suspend,

	.resume		= gpio_keys_resume,

	.driver		= {

		.name	= "gpio-keys",

	}

include/linux/gpio_keys.h

+1 −0
Original line number Diff line number Diff line
@@ -8,6 +8,7 @@ struct gpio_keys_button { 
	int active_low;

	char *desc;

	int type;		/* input event type (EV_KEY, EV_SW) */

	int wakeup;		/* configure the button as a wake-up source */

};



struct gpio_keys_platform_data {