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path: root/drivers/input/keyboard/gpio_keys.c
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Diffstat (limited to 'drivers/input/keyboard/gpio_keys.c')
-rw-r--r--drivers/input/keyboard/gpio_keys.c81
1 files changed, 74 insertions, 7 deletions
diff --git a/drivers/input/keyboard/gpio_keys.c b/drivers/input/keyboard/gpio_keys.c
index f0b22b8b276..e2a3293bc67 100644
--- a/drivers/input/keyboard/gpio_keys.c
+++ b/drivers/input/keyboard/gpio_keys.c
@@ -54,6 +54,7 @@ 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)
@@ -77,31 +78,51 @@ static int __devinit gpio_keys_probe(struct platform_device *pdev)
int irq = gpio_to_irq(button->gpio);
unsigned int type = button->type ?: EV_KEY;
- set_irq_type(irq, IRQ_TYPE_EDGE_BOTH);
- error = request_irq(irq, gpio_keys_isr, IRQF_SAMPLE_RANDOM,
- button->desc ? button->desc : "gpio_keys",
- pdev);
+ if (irq < 0) {
+ error = irq;
+ printk(KERN_ERR
+ "gpio-keys: "
+ "Unable to get irq number for GPIO %d,"
+ "error %d\n",
+ button->gpio, error);
+ goto fail;
+ }
+
+ error = request_irq(irq, gpio_keys_isr,
+ IRQF_SAMPLE_RANDOM | IRQF_TRIGGER_RISING |
+ IRQF_TRIGGER_FALLING,
+ button->desc ? button->desc : "gpio_keys",
+ pdev);
if (error) {
- printk(KERN_ERR "gpio-keys: unable to claim irq %d; error %d\n",
+ printk(KERN_ERR
+ "gpio-keys: Unable to claim irq %d; error %d\n",
irq, error);
goto fail;
}
+ if (button->wakeup)
+ wakeup = 1;
+
input_set_capability(input, type, button->code);
}
error = input_register_device(input);
if (error) {
- printk(KERN_ERR "Unable to register gpio-keys input device\n");
+ printk(KERN_ERR
+ "gpio-keys: Unable to register input device, "
+ "error: %d\n", error);
goto fail;
}
+ device_init_wakeup(&pdev->dev, wakeup);
+
return 0;
fail:
- for (i = i - 1; i >= 0; i--)
+ while (--i >= 0)
free_irq(gpio_to_irq(pdata->buttons[i].gpio), pdev);
+ platform_set_drvdata(pdev, NULL);
input_free_device(input);
return error;
@@ -113,6 +134,8 @@ 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);
@@ -123,9 +146,53 @@ 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",
}