regulator: s5m8767: Properly handle gpio_request failure
Convert to devm_gpio_request to save a few error handling code.
This patch properly handle the gpio_request failure, we should return error
when gpio_request fails rather than just show warning.
I think one of the reason we got -EBUSY is because current code does not free
gpios in s5m8767_pmic_remove(). So it got -EBUSY when reload the module.
Yest another reason is in current code if gpio_request() returns error,
the rest of the code still calls gpio_direction_output to config buck_gpios
and buck_ds gpios. This looks wrong to me.
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/drivers/regulator/s5m8767.c b/drivers/regulator/s5m8767.c
index 1ad9c3c..102287f 100644
--- a/drivers/regulator/s5m8767.c
+++ b/drivers/regulator/s5m8767.c
@@ -620,20 +620,21 @@
if (gpio_is_valid(pdata->buck_gpios[0]) &&
gpio_is_valid(pdata->buck_gpios[1]) &&
gpio_is_valid(pdata->buck_gpios[2])) {
- ret = gpio_request(pdata->buck_gpios[0], "S5M8767 SET1");
- if (ret == -EBUSY)
- dev_warn(&pdev->dev, "Duplicated gpio request"
- " for SET1\n");
+ ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[0],
+ "S5M8767 SET1");
+ if (ret)
+ return ret;
- ret = gpio_request(pdata->buck_gpios[1], "S5M8767 SET2");
- if (ret == -EBUSY)
- dev_warn(&pdev->dev, "Duplicated gpio request"
- " for SET2\n");
+ ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[1],
+ "S5M8767 SET2");
+ if (ret)
+ return ret;
- ret = gpio_request(pdata->buck_gpios[2], "S5M8767 SET3");
- if (ret == -EBUSY)
- dev_warn(&pdev->dev, "Duplicated gpio request"
- " for SET3\n");
+ ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[2],
+ "S5M8767 SET3");
+ if (ret)
+ return ret;
+
/* SET1 GPIO */
gpio_direction_output(pdata->buck_gpios[0],
(s5m8767->buck_gpioindex >> 2) & 0x1);
@@ -643,25 +644,23 @@
/* SET3 GPIO */
gpio_direction_output(pdata->buck_gpios[2],
(s5m8767->buck_gpioindex >> 0) & 0x1);
- ret = 0;
-
} else {
dev_err(&pdev->dev, "GPIO NOT VALID\n");
ret = -EINVAL;
return ret;
}
- ret = gpio_request(pdata->buck_ds[0], "S5M8767 DS2");
- if (ret == -EBUSY)
- dev_warn(&pdev->dev, "Duplicated gpio request for DS2\n");
+ ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[0], "S5M8767 DS2");
+ if (ret)
+ return ret;
- ret = gpio_request(pdata->buck_ds[1], "S5M8767 DS3");
- if (ret == -EBUSY)
- dev_warn(&pdev->dev, "Duplicated gpio request for DS3\n");
+ ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[1], "S5M8767 DS3");
+ if (ret)
+ return ret;
- ret = gpio_request(pdata->buck_ds[2], "S5M8767 DS4");
- if (ret == -EBUSY)
- dev_warn(&pdev->dev, "Duplicated gpio request for DS4\n");
+ ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[2], "S5M8767 DS4");
+ if (ret)
+ return ret;
/* DS2 GPIO */
gpio_direction_output(pdata->buck_ds[0], 0x0);