Input: mcs_touchkey - add shutdown handler
The MCS50XX series has a HW bug that requires explicit chip power down.
If chip is not powered down before shutting the system down the control
pins (powerup, interrupt) are pulled up and residue current continues
flowing into the chips making them continue consuming power.
Signed-off-by: Heungjun Kim <riverful.kim@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/drivers/input/keyboard/mcs_touchkey.c b/drivers/input/keyboard/mcs_touchkey.c
index 03fa59a..af1aab3 100644
--- a/drivers/input/keyboard/mcs_touchkey.c
+++ b/drivers/input/keyboard/mcs_touchkey.c
@@ -212,6 +212,14 @@
return 0;
}
+static void mcs_touchkey_shutdown(struct i2c_client *client)
+{
+ struct mcs_touchkey_data *data = i2c_get_clientdata(client);
+
+ if (data->poweron)
+ data->poweron(false);
+}
+
#ifdef CONFIG_PM_SLEEP
static int mcs_touchkey_suspend(struct device *dev)
{
@@ -262,6 +270,7 @@
},
.probe = mcs_touchkey_probe,
.remove = __devexit_p(mcs_touchkey_remove),
+ .shutdown = mcs_touchkey_shutdown,
.id_table = mcs_touchkey_id,
};