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

[Fabio Estevam <festevam@gmail.com>]

From: Fabio Estevam <festevam@denx.de>

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>
---
 drivers/gpio/gpio-pca953x.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c
index 8baf3edd5274..3f2d33ee20cc 100644
--- 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;
 	}
 
-- 
2.34.1