leds: lm3692x: Print error value on dev_err

This gives a way better idea what is going on.

Signed-off-by: Guido Günther <agx@sigxcpu.org>
Reviewed-by: Dan Murphy <dmurphy@ti.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Pavel Machek <pavel@ucw.cz>

diff --git a/drivers/leds/leds-lm3692x.c b/drivers/leds/leds-lm3692x.c
index 3d381f2..487228c 100644 (file)
--- a/drivers/leds/leds-lm3692x.c
+++ b/drivers/leds/leds-lm3692x.c
@@ -174,19 +174,20 @@ static int lm3692x_brightness_set(struct led_classdev *led_cdev,
 
        ret = lm3692x_fault_check(led);
        if (ret) {
-               dev_err(&led->client->dev, "Cannot read/clear faults\n");
+               dev_err(&led->client->dev, "Cannot read/clear faults: %d\n",
+                       ret);
                goto out;
        }
 
        ret = regmap_write(led->regmap, LM3692X_BRT_MSB, brt_val);
        if (ret) {
-               dev_err(&led->client->dev, "Cannot write MSB\n");
+               dev_err(&led->client->dev, "Cannot write MSB: %d\n", ret);
                goto out;
        }
 
        ret = regmap_write(led->regmap, LM3692X_BRT_LSB, led_brightness_lsb);
        if (ret) {
-               dev_err(&led->client->dev, "Cannot write LSB\n");
+               dev_err(&led->client->dev, "Cannot write LSB: %d\n", ret);
                goto out;
        }
 out:
@@ -203,7 +204,7 @@ static int lm3692x_init(struct lm3692x_led *led)
                ret = regulator_enable(led->regulator);
                if (ret) {
                        dev_err(&led->client->dev,
-                               "Failed to enable regulator\n");
+                               "Failed to enable regulator: %d\n", ret);
                        return ret;
                }
        }
@@ -213,7 +214,8 @@ static int lm3692x_init(struct lm3692x_led *led)
 
        ret = lm3692x_fault_check(led);
        if (ret) {
-               dev_err(&led->client->dev, "Cannot read/clear faults\n");
+               dev_err(&led->client->dev, "Cannot read/clear faults: %d\n",
+                       ret);
                goto out;
        }
 
@@ -409,7 +411,8 @@ static int lm3692x_remove(struct i2c_client *client)
 
        ret = regmap_update_bits(led->regmap, LM3692X_EN, LM3692X_DEVICE_EN, 0);
        if (ret) {
-               dev_err(&led->client->dev, "Failed to disable regulator\n");
+               dev_err(&led->client->dev, "Failed to disable regulator: %d\n",
+                       ret);
                return ret;
        }
 
@@ -420,7 +423,7 @@ static int lm3692x_remove(struct i2c_client *client)
                ret = regulator_disable(led->regulator);
                if (ret)
                        dev_err(&led->client->dev,
-                               "Failed to disable regulator\n");
+                               "Failed to disable regulator: %d\n", ret);
        }
 
        mutex_destroy(&led->lock);