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| author | Axel Lin <axel.lin@gmail.com> | 2012-07-05 23:12:49 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-07-15 21:49:53 +0100 |
| commit | 5febb3c9d52c65686a8e473a31f15137852f4b5e (patch) | |
| tree | 6d291f4989841b875bab4c6004dd7bd32c3870f4 /drivers/regulator | |
| parent | 8fa25eda86b1a149fd19b5ce80d8cf7b6c8fb566 (diff) | |
| download | linux-3.10-5febb3c9d52c65686a8e473a31f15137852f4b5e.tar.gz linux-3.10-5febb3c9d52c65686a8e473a31f15137852f4b5e.tar.bz2 linux-3.10-5febb3c9d52c65686a8e473a31f15137852f4b5e.zip | |
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>
Diffstat (limited to 'drivers/regulator')
| -rw-r--r-- | drivers/regulator/s5m8767.c | 49 |
1 files changed, 24 insertions, 25 deletions
diff --git a/drivers/regulator/s5m8767.c b/drivers/regulator/s5m8767.c index 1ad9c3c0da8..102287fa7ec 100644 --- a/drivers/regulator/s5m8767.c +++ b/drivers/regulator/s5m8767.c @@ -620,20 +620,21 @@ static __devinit int s5m8767_pmic_probe(struct platform_device *pdev) 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 = gpio_request(pdata->buck_gpios[1], "S5M8767 SET2"); - if (ret == -EBUSY) - dev_warn(&pdev->dev, "Duplicated gpio request" - " for SET2\n"); - - 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[0], + "S5M8767 SET1"); + if (ret) + return ret; + + ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[1], + "S5M8767 SET2"); + if (ret) + return ret; + + 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 @@ static __devinit int s5m8767_pmic_probe(struct platform_device *pdev) /* 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); |