From 5f62615ef5e50b0ad6c125fe1e38f2ac675012e2 Mon Sep 17 00:00:00 2001 From: HeungJun Kim Date: Wed, 23 Feb 2011 21:42:49 -0800 Subject: [PATCH] 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 Signed-off-by: Kyungmin Park Signed-off-by: Dmitry Torokhov --- drivers/input/keyboard/mcs_touchkey.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/input/keyboard/mcs_touchkey.c b/drivers/input/keyboard/mcs_touchkey.c index 03fa59a0b220..af1aab324a4c 100644 --- a/drivers/input/keyboard/mcs_touchkey.c +++ b/drivers/input/keyboard/mcs_touchkey.c @@ -212,6 +212,14 @@ static int __devexit mcs_touchkey_remove(struct i2c_client *client) 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 @@ static struct i2c_driver mcs_touchkey_driver = { }, .probe = mcs_touchkey_probe, .remove = __devexit_p(mcs_touchkey_remove), + .shutdown = mcs_touchkey_shutdown, .id_table = mcs_touchkey_id, }; -- 2.34.1