Commit 934df231 authored by H. Nikolaus Schaller's avatar H. Nikolaus Schaller Committed by Dmitry Torokhov
Browse files

Input: tsc2007 - check for presence and power down tsc2007 during probe 



1. check if chip is really present and don't succeed if it isn't.
2. if it succeeds, power down the chip until accessed

Signed-off-by: default avatarH. Nikolaus Schaller <hns@goldelico.com>
Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent 69973b83

drivers/input/touchscreen/tsc2007.c

+8 −0
Original line number Diff line number Diff line
@@ -455,6 +455,14 @@ static int tsc2007_probe(struct i2c_client *client, 


	tsc2007_stop(ts);



	/* power down the chip (TSC2007_SETUP does not ACK on I2C) */

	err = tsc2007_xfer(ts, PWRDOWN);

	if (err < 0) {

		dev_err(&client->dev,

			"Failed to setup chip: %d\n", err);

		return err;	/* usually, chip does not respond */

	}



	err = input_register_device(input_dev);

	if (err) {

		dev_err(&client->dev,

CRA Git | Maintained and supported by SUSTech CRA and CCSE