Re: [PATCH v9 2/8] drivers:input:tsc2007: check for presence and power down tsc2007 during probe

On Wed, Dec 28, 2016 at 03:53:17PM +0100, H. Nikolaus Schaller wrote:

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: H. Nikolaus Schaller hns@goldelico.com

Applied, thank you.

---

drivers/input/touchscreen/tsc2007.c | 8 ++++++++ 1 file changed, 8 insertions(+)

diff --git a/drivers/input/touchscreen/tsc2007.c b/drivers/input/touchscreen/tsc2007.c index c1d9593..76b462b 100644 --- a/drivers/input/touchscreen/tsc2007.c +++ b/drivers/input/touchscreen/tsc2007.c @@ -529,6 +529,14 @@ 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,

-- 2.7.3