5.4-stable review patch. If anyone has any objections, please let me know.
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From: Andrei Lalaev andrei.lalaev@anton-paar.com
[ Upstream commit 866a5c7e2781cf1b019072288f1f5c64186dcb63 ]
If the device is missing, we get the following error:
qt1050 3-0041: ID -1340767592 not supported
Let's handle this situation and print more informative error when reading of CHIP_ID fails:
qt1050 3-0041: Failed to read chip ID: -6
Fixes: cbebf5addec1 ("Input: qt1050 - add Microchip AT42QT1050 support") Signed-off-by: Andrei Lalaev andrei.lalaev@anton-paar.com Reviewed-by: Marco Felsch m.felsch@pengutronix.de Link: https://lore.kernel.org/r/20240617183018.916234-1-andrey.lalaev@gmail.com Signed-off-by: Dmitry Torokhov dmitry.torokhov@gmail.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/input/keyboard/qt1050.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/input/keyboard/qt1050.c b/drivers/input/keyboard/qt1050.c index 403060d05c3b3..7193a4198e214 100644 --- a/drivers/input/keyboard/qt1050.c +++ b/drivers/input/keyboard/qt1050.c @@ -226,7 +226,12 @@ static bool qt1050_identify(struct qt1050_priv *ts) int err;
/* Read Chip ID */ - regmap_read(ts->regmap, QT1050_CHIP_ID, &val); + err = regmap_read(ts->regmap, QT1050_CHIP_ID, &val); + if (err) { + dev_err(&ts->client->dev, "Failed to read chip ID: %d\n", err); + return false; + } + if (val != QT1050_CHIP_ID_VER) { dev_err(&ts->client->dev, "ID %d not supported\n", val); return false;