diff mbox series

Input: qt1050 - handle CHIP_ID reading error

Message ID 20240617183018.916234-1-andrey.lalaev@gmail.com (mailing list archive)
State Mainlined
Commit 866a5c7e2781cf1b019072288f1f5c64186dcb63
Headers show
Series Input: qt1050 - handle CHIP_ID reading error | expand

Commit Message

Andrei Lalaev June 17, 2024, 6:30 p.m. UTC 
From: Andrei Lalaev <andrei.lalaev@anton-paar.com>

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>
---
 drivers/input/keyboard/qt1050.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

Comments

Marco Felsch June 25, 2024, 8:32 a.m. UTC | #1 
On 24-06-17, Andrei Lalaev wrote:
> From: Andrei Lalaev <andrei.lalaev@anton-paar.com>
> 
> 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>
Dmitry Torokhov June 25, 2024, 4:14 p.m. UTC | #2 
On Mon, Jun 17, 2024 at 08:30:18PM +0200, Andrei Lalaev wrote:
> From: Andrei Lalaev <andrei.lalaev@anton-paar.com>
> 
> 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>

Applied, thank you.

But how did we get into the situation with the chip being missing?
Incorrect DTB for the board?

Thanks.
diff mbox series

Patch

diff --git a/drivers/input/keyboard/qt1050.c b/drivers/input/keyboard/qt1050.c
index b51dfcd76038..056e9bc26026 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;