Add a device managed hook, via devm_add_action_or_reset() and
mt6577_power_off(), to power off on device detach.
Replace iio_device_register() by devm_iio_device_register() and remove
the mt6577_auxadc_remove() function used to unregister the device and
power off the device.
Remove platform_set_drvdata() from the probe function, since
platform_get_drvdata() is not used anymore.
Remove mt6577_auxadc_mod_reg() call from the probe function error path.
Signed-off-by: Jinjie Ruan <ruanjinjie@xxxxxxxxxx>
Suggested-by: Jonathan Cameron <jic23@xxxxxxxxxx>
---
drivers/iio/adc/mt6577_auxadc.c | 40 +++++++++++++--------------------
1 file changed, 15 insertions(+), 25 deletions(-)
diff --git a/drivers/iio/adc/mt6577_auxadc.c b/drivers/iio/adc/mt6577_auxadc.c
index 935cf560e238..c8f7bfa59146 100644
--- a/drivers/iio/adc/mt6577_auxadc.c
+++ b/drivers/iio/adc/mt6577_auxadc.c
@@ -246,6 +246,14 @@ static int mt6577_auxadc_suspend(struct device *dev)
return 0;
}
+static void mt6577_power_off(void *data)
+{
+ struct mt6577_auxadc_device *adc_dev = data;
+
+ mt6577_auxadc_mod_reg(adc_dev->reg_base + MT6577_AUXADC_MISC,
+ 0, MT6577_AUXADC_PDN_EN);
+}
+
static int mt6577_auxadc_probe(struct platform_device *pdev)
{
struct mt6577_auxadc_device *adc_dev;
@@ -286,31 +294,14 @@ static int mt6577_auxadc_probe(struct platform_device *pdev)
MT6577_AUXADC_PDN_EN, 0);
mdelay(MT6577_AUXADC_POWER_READY_MS);
- platform_set_drvdata(pdev, indio_dev);
-
- ret = iio_device_register(indio_dev);
- if (ret < 0) {
- dev_err(&pdev->dev, "failed to register iio device\n");
- goto err_power_off;
- }
-
- return 0;
+ ret = devm_add_action_or_reset(&pdev->dev, mt6577_power_off, adc_dev);
+ if (ret)
+ return dev_err_probe(&pdev->dev, ret,
+ "Failed to add action to managed power off: %d\n", ret);
-err_power_off:
- mt6577_auxadc_mod_reg(adc_dev->reg_base + MT6577_AUXADC_MISC,
- 0, MT6577_AUXADC_PDN_EN);
- return ret;
-}
-
-static int mt6577_auxadc_remove(struct platform_device *pdev)
-{
- struct iio_dev *indio_dev = platform_get_drvdata(pdev);
- struct mt6577_auxadc_device *adc_dev = iio_priv(indio_dev);
-
- iio_device_unregister(indio_dev);
-
- mt6577_auxadc_mod_reg(adc_dev->reg_base + MT6577_AUXADC_MISC,
- 0, MT6577_AUXADC_PDN_EN);
+ ret = devm_iio_device_register(&pdev->dev, indio_dev);
+ if (ret < 0)
+ return dev_err_probe(&pdev->dev, ret, "failed to register iio device\n");
return 0;
}
@@ -337,7 +328,6 @@ static struct platform_driver mt6577_auxadc_driver = {
.pm = pm_sleep_ptr(&mt6577_auxadc_pm_ops),
},
.probe = mt6577_auxadc_probe,
- .remove = mt6577_auxadc_remove,
};
module_platform_driver(mt6577_auxadc_driver);
--
2.34.1
