Re: [PATCH v9 2/8] drivers:input:tsc2007: check for presence and power down tsc2007 during probe
From: Dmitry Torokhov <hidden>
Date: 2017-02-17 20:52:52
Also in:
linux-iio, linux-input, linux-omap, lkml
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 <redacted>
Applied, thank you.
quoted hunk ↗ jump to hunk
--- 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
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