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Message-ID: <46EFF30B.5010709@artecdesign.ee>
Date: Tue, 18 Sep 2007 18:47:23 +0300
From: Anti Sullin <anti.sullin@...ecdesign.ee>
To: LKML <linux-kernel@...r.kernel.org>
CC: dtor@...l.ru, akpm@...ux-foundation.org, david-b@...bell.net
Subject: [PATCH 2/2][resend] gpio_keys: Add suspend and resume
This patch adds suspend/resume support and enables wakeup from gpio_keys
buttons.
Signed-off-by: Anti Sullin <anti.sullin@...ecdesign.ee>
---
Compared to previous patch sent, in this version the disable_irq_wake is
called only for those IRQs, that were enabled earlier.
---
diff -pur linux-2.6.23-rc5-old/drivers/input/keyboard/gpio_keys.c linux-2.6.23-rc5/drivers/input/keyboard/gpio_keys.c
--- linux-2.6.23-rc5-old/drivers/input/keyboard/gpio_keys.c 2007-09-18 17:43:54.000000000 +0300
+++ linux-2.6.23-rc5/drivers/input/keyboard/gpio_keys.c 2007-09-18 17:25:14.000000000 +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)
@@ -89,6 +90,9 @@ static int __devinit gpio_keys_probe(str
goto fail;
}
+ if (button->wakeup)
+ wakeup = 1;
+
input_set_capability(input, type, button->code);
}
@@ -98,6 +102,8 @@ static int __devinit gpio_keys_probe(str
goto fail;
}
+ device_init_wakeup(&pdev->dev, wakeup);
+
return 0;
fail:
@@ -120,14 +126,55 @@ 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;
+
+ 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)
+ 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-old/include/linux/gpio_keys.h linux-2.6.23-rc5/include/linux/gpio_keys.h
--- linux-2.6.23-rc5-old/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 {
--
Anti Sullin
Embedded Software Engineer
Artec Design LLC
Türi 10C, 11313, Tallinn, Estonia
Phone: +3726718550; Direct: +3726718564
Fax: +3726718555; GSM: +3725583068
email: anti.sullin@...ecdesign.ee
http://www.artecdesign.ee
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