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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: Anti Sullin <anti.sullin@artecdesign.ee>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Anti Sullin 2007-09-26 00:01:17 -04:00 committed by Dmitry Torokhov
parent 006df30244
commit e15b02138b
2 changed files with 53 additions and 0 deletions
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52
drivers/input/keyboard/gpio_keys.c
View File

@ -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 gpio_keys_platform_data *pdata = pdev->dev.platform_data;
struct input_dev *input; struct input_dev *input;
int i, error; int i, error;
int wakeup = 0;
input = input_allocate_device(); input = input_allocate_device();
if (!input) if (!input)
@ -100,6 +101,9 @@ static int __devinit gpio_keys_probe(struct platform_device *pdev)
goto fail; goto fail;
} }
if (button->wakeup)
wakeup = 1;
input_set_capability(input, type, button->code); input_set_capability(input, type, button->code);
} }
@ -111,6 +115,8 @@ static int __devinit gpio_keys_probe(struct platform_device *pdev)
goto fail; goto fail;
} }
device_init_wakeup(&pdev->dev, wakeup);
return 0; return 0;
fail: fail:
@ -129,6 +135,8 @@ static int __devexit gpio_keys_remove(struct platform_device *pdev)
struct input_dev *input = platform_get_drvdata(pdev); struct input_dev *input = platform_get_drvdata(pdev);
int i; int i;
device_init_wakeup(&pdev->dev, 0);
for (i = 0; i < pdata->nbuttons; i++) { for (i = 0; i < pdata->nbuttons; i++) {
int irq = gpio_to_irq(pdata->buttons[i].gpio); int irq = gpio_to_irq(pdata->buttons[i].gpio);
free_irq(irq, pdev); free_irq(irq, pdev);
@ -139,9 +147,53 @@ static int __devexit gpio_keys_remove(struct platform_device *pdev)
return 0; 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 = { struct platform_driver gpio_keys_device_driver = {
.probe = gpio_keys_probe, .probe = gpio_keys_probe,
.remove = __devexit_p(gpio_keys_remove), .remove = __devexit_p(gpio_keys_remove),
.suspend = gpio_keys_suspend,
.resume = gpio_keys_resume,
.driver = { .driver = {
.name = "gpio-keys", .name = "gpio-keys",
} }

1
include/linux/gpio_keys.h
View File

@ -8,6 +8,7 @@ struct gpio_keys_button {
int active_low; int active_low;
char *desc; char *desc;
int type; /* input event type (EV_KEY, EV_SW) */ int type; /* input event type (EV_KEY, EV_SW) */
int wakeup; /* configure the button as a wake-up source */
}; };
struct gpio_keys_platform_data { struct gpio_keys_platform_data {