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 --- a/drivers/hid/i2c-hid/i2c-hid-core.c +++ b/drivers/hid/i2c-hid/i2c-hid-core.c @@ -419,6 +419,9 @@ static int i2c_hid_set_power(struct i2c_client *client, int power_state) if (ret) dev_err(&client->dev, "failed to change power setting.\n"); + if (!ret && power_state == I2C_HID_PWR_ON) + msleep(60); + set_pwr_exit: return ret; } -- 2.17.1
