gpio-charger: Add gpio_charger_resume

Gpio charger should notify if the gpio state had changed
during suspend. This will send a CHANGED event each time
the system resumes, ensuring a plug/unplug of the charger
is not missed.

Signed-off-by: Benson Leung <bleung@chromium.org>
Acked-By: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/drivers/power/gpio-charger.c b/drivers/power/gpio-charger.c
index 25b88ac1d44c..718f2c537827 100644
--- a/drivers/power/gpio-charger.c
+++ b/drivers/power/gpio-charger.c
@@ -161,12 +161,27 @@ static int __devexit gpio_charger_remove(struct platform_device *pdev)
         return 0;
 }
 
+#ifdef CONFIG_PM_SLEEP
+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);
+
+        power_supply_changed(&gpio_charger->charger);
+
+        return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(gpio_charger_pm_ops, NULL, gpio_charger_resume);
+
 static struct platform_driver gpio_charger_driver = {
         .probe = gpio_charger_probe,
         .remove = __devexit_p(gpio_charger_remove),
         .driver = {
                 .name = "gpio-charger",
                 .owner = THIS_MODULE,
+                .pm = &gpio_charger_pm_ops,
         },
 };