gpio: pca953x: Print the error code on read/write failures

Print the error code in the pca953x_write_regs() and pca953x_read_regs()
functions to help debugging.

Suggested-by: Russell King (Oracle) <linux@armlinux.org.uk>
Signed-off-by: Fabio Estevam <festevam@denx.de>
Link: https://lore.kernel.org/r/20240821114202.2072220-1-festevam@gmail.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c
index 8baf3edd527411953db6a64bda865dc353bf6f1f..3f2d33ee20cca9c8cb04956cdd24efab0767ea10 100644 (file)
--- a/drivers/gpio/gpio-pca953x.c
+++ b/drivers/gpio/gpio-pca953x.c
@@ -498,7 +498,7 @@ static int pca953x_write_regs(struct pca953x_chip *chip, int reg, unsigned long
 
        ret = regmap_bulk_write(chip->regmap, regaddr, value, NBANK(chip));
        if (ret < 0) {
-               dev_err(&chip->client->dev, "failed writing register\n");
+               dev_err(&chip->client->dev, "failed writing register: %d\n", ret);
                return ret;
        }
 
@@ -513,7 +513,7 @@ static int pca953x_read_regs(struct pca953x_chip *chip, int reg, unsigned long *
 
        ret = regmap_bulk_read(chip->regmap, regaddr, value, NBANK(chip));
        if (ret < 0) {
-               dev_err(&chip->client->dev, "failed reading register\n");
+               dev_err(&chip->client->dev, "failed reading register: %d\n", ret);
                return ret;
        }