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Subject[PATCH] gpio-charger: support wakeup events
Date
Add support for using gpio-charger IRQ as a wakeup event.

Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
---
drivers/power/gpio-charger.c | 19 ++++++++++++++++++-
1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/drivers/power/gpio-charger.c b/drivers/power/gpio-charger.c
index 4e858a2..a0024b2 100644
--- a/drivers/power/gpio-charger.c
+++ b/drivers/power/gpio-charger.c
@@ -28,6 +28,7 @@
struct gpio_charger {
const struct gpio_charger_platform_data *pdata;
unsigned int irq;
+ bool wakeup_enabled;

struct power_supply charger;
};
@@ -136,6 +137,8 @@ static int gpio_charger_probe(struct platform_device *pdev)

platform_set_drvdata(pdev, gpio_charger);

+ device_init_wakeup(&pdev->dev, 1);
+
return 0;

err_gpio_free:
@@ -159,18 +162,32 @@ static int gpio_charger_remove(struct platform_device *pdev)
}

#ifdef CONFIG_PM_SLEEP
+static int gpio_charger_suspend(struct device *dev)
+{
+ struct gpio_charger *gpio_charger = dev_get_drvdata(dev);
+
+ if (device_may_wakeup(dev))
+ gpio_charger->wakeup_enabled =
+ enable_irq_wake(gpio_charger->irq);
+
+ return 0;
+}
+
static int gpio_charger_resume(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct gpio_charger *gpio_charger = platform_get_drvdata(pdev);

+ if (gpio_charger->wakeup_enabled)
+ disable_irq_wake(gpio_charger->irq);
power_supply_changed(&gpio_charger->charger);

return 0;
}
#endif

-static SIMPLE_DEV_PM_OPS(gpio_charger_pm_ops, NULL, gpio_charger_resume);
+static SIMPLE_DEV_PM_OPS(gpio_charger_pm_ops,
+ gpio_charger_suspend, gpio_charger_resume);

static struct platform_driver gpio_charger_driver = {
.probe = gpio_charger_probe,
--
1.8.4.3


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