5.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Andrei Lalaev <andrei.lalaev@xxxxxxxxxxxxxx>
[ 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@xxxxxxxxxxxxxx>
Reviewed-by: Marco Felsch <m.felsch@xxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20240617183018.916234-1-andrey.lalaev@xxxxxxxxx
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
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;
--
2.43.0
