[PATCH] HID: i2c-hid: Add 60ms delay after SET_POWER ON
From: Kai-Heng Feng
Date: Mon Aug 10 2020 - 10:29:42 EST
Goodix touchpad fails to operate in I2C mode after system suspend.
According to the vendor, Windows is more forgiving and there's a 60ms
delay after SET_POWER ON command.
So let's do the same here, to workaround for the touchpads that depend
on the delay.
Signed-off-by: Kai-Heng Feng <kai.heng.feng@xxxxxxxxxxxxx>
drivers/hid/i2c-hid/i2c-hid-core.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/hid/i2c-hid/i2c-hid-core.c b/drivers/hid/i2c-hid/i2c-hid-core.c
index 294c84e136d7..7b24a27fad95 100644
@@ -419,6 +419,9 @@ static int i2c_hid_set_power(struct i2c_client *client, int power_state)
dev_err(&client->dev, "failed to change power setting.\n");
+ if (!ret && power_state == I2C_HID_PWR_ON)