[PATCH v2 1/2] i2c: s3c2410: Print errno code in error logs

From: Javier Martinez Canillas
Date: Wed Apr 20 2016 - 10:38:22 EST


The driver not always prints the error code in case of a failure but this
information can be very useful for debugging. So let's print if available.

Signed-off-by: Javier Martinez Canillas <javier@xxxxxxxxxxxxxxx>

---

Hello,

This patch and 2/2 were only build tested because I don't have access to
a board using this IP block. I just noticed these issues when comparing
the i2c-s3c2410 driver with i2c-exynos5 where I did some fixes recently.

I think the patches are simple enough that is safe to pick them but of
course testing will be highly appreciated.

Best regards,
Javier

Changes in v2:
- Don't print the errno code on probe since it's already printed by the
core. Suggested by Krzysztof Kozlowski.

drivers/i2c/busses/i2c-s3c2410.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/i2c/busses/i2c-s3c2410.c b/drivers/i2c/busses/i2c-s3c2410.c
index 362a6de54833..13f67df65c45 100644
--- a/drivers/i2c/busses/i2c-s3c2410.c
+++ b/drivers/i2c/busses/i2c-s3c2410.c
@@ -944,7 +944,7 @@ static int s3c24xx_i2c_cpufreq_transition(struct notifier_block *nb,
i2c_unlock_adapter(&i2c->adap);

if (ret < 0)
- dev_err(i2c->dev, "cannot find frequency\n");
+ dev_err(i2c->dev, "cannot find frequency (%d)\n", ret);
else
dev_info(i2c->dev, "setting freq %d\n", got);
}
@@ -995,7 +995,8 @@ static int s3c24xx_i2c_parse_dt_gpio(struct s3c24xx_i2c *i2c)

ret = gpio_request(gpio, "i2c-bus");
if (ret) {
- dev_err(i2c->dev, "gpio [%d] request failed\n", gpio);
+ dev_err(i2c->dev, "gpio [%d] request failed (%d)\n",
+ gpio, ret);
goto free_gpio;
}
}
--
2.5.5