This patch adds suspend/resume support and enables wakeup from gpio_keys
buttons. Buttons, that generate wakeup events, can be specified in
platform data.
Signed-off-by: Anti Sullin <[email protected]>
diff -pur linux-2.6.23-rc5-clean/drivers/input/keyboard/gpio_keys.c
linux-2.6.23-rc5/drivers/input/keyboard/gpio_keys.c
--- linux-2.6.23-rc5-clean/drivers/input/keyboard/gpio_keys.c
2007-09-10 09:52:18.000000000 +0300
+++ linux-2.6.23-rc5/drivers/input/keyboard/gpio_keys.c 2007-09-10
10:01:56.000000000 +0300
@@ -54,6 +54,7 @@ static int __devinit gpio_keys_probe(str
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)
@@ -87,6 +88,9 @@ static int __devinit gpio_keys_probe(str
goto fail;
}
+ if (button->wakeup)
+ wakeup = 1;
+
input_set_capability(input, type, button->code);
}
@@ -96,6 +100,8 @@ static int __devinit gpio_keys_probe(str
goto fail;
}
+ device_init_wakeup(&pdev->dev, wakeup);
+
return 0;
fail:
@@ -118,14 +124,52 @@ static int __devexit gpio_keys_remove(st
free_irq(irq, pdev);
}
+ device_init_wakeup(&pdev->dev, 0);
input_unregister_device(input);
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++) {
+ int irq = gpio_to_irq(pdata->buttons[i].gpio);
+ if (pdata->buttons[i].wakeup)
+ 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;
+
+ for (i = 0; i < pdata->nbuttons; i++) {
+ int irq = gpio_to_irq(pdata->buttons[i].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",
}
diff -pur linux-2.6.23-rc5-clean/include/linux/gpio_keys.h
linux-2.6.23-rc5/include/linux/gpio_keys.h
--- linux-2.6.23-rc5-clean/include/linux/gpio_keys.h 2007-09-01
09:08:24.000000000 +0300
+++ linux-2.6.23-rc5/include/linux/gpio_keys.h 2007-09-10
10:43:39.000000000 +0300
@@ -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 wake-up source from
suspend */
};
struct gpio_keys_platform_data {
-
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