[PATCH v2 4/6] iio: imx7d_adc: Simplify imx7d_adc_probe() with imx7d_adc_resume()

Andrey Smirnov
2019-04-14T18:35:20Z

Initialization sequence performed in imx7d_adc_resume() is exactly the
same as the one being done in imx7d_adc_probe(). Make use of the
former in the latter to avoid code duplication. Rename
imx7d_adc_resume() to imx7d_adc_enable() for clarity while at it.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Cc: Jonathan Cameron <jic23@kernel.org>
Cc: Hartmut Knaack <knaack.h@gmx.de>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Peter Meerwald-Stadler <pmeerw@pmeerw.net>
Cc: Chris Healy <cphealy@gmail.com>
Cc: linux-iio@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
---
drivers/iio/adc/imx7d_adc.c | 88 +++++++++++++++----------------------
1 file changed, 36 insertions(+), 52 deletions(-)

diff --git a/drivers/iio/adc/imx7d_adc.c b/drivers/iio/adc/imx7d_adc.c
index 147ee8575ad0..0922ee08546b 100644
--- a/drivers/iio/adc/imx7d_adc.c
+++ b/drivers/iio/adc/imx7d_adc.c
@@ -434,6 +434,33 @@ static void imx7d_adc_power_down(struct imx7d_adc *info)
writel(adc_cfg, info->regs + IMX7D_REG_ADC_ADC_CFG);
}

+static int imx7d_adc_enable(struct device *dev)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct imx7d_adc *info = iio_priv(indio_dev);
+ int ret;
+
+ ret = regulator_enable(info->vref);
+ if (ret) {
+ dev_err(info->dev,
+ "Can't enable adc reference top voltage, err = %d\n",
+ ret);
+ return ret;
+ }
+
+ ret = clk_prepare_enable(info->clk);
+ if (ret) {
+ dev_err(info->dev,
+ "Could not prepare or enable clock.\n");
+ regulator_disable(info->vref);
+ return ret;
+ }
+
+ imx7d_adc_hw_init(info);
+
+ return 0;
+}
+
static int imx7d_adc_probe(struct platform_device *pdev)
{
struct imx7d_adc *info;
@@ -479,14 +506,6 @@ static int imx7d_adc_probe(struct platform_device *pdev)
return ret;
}

- ret = regulator_enable(info->vref);
- if (ret) {
- dev_err(dev,
- "Can't enable adc reference top voltage, err = %d\n",
- ret);
- return ret;
- }
-
platform_set_drvdata(pdev, indio_dev);

init_completion(&info->completion);
@@ -498,38 +517,30 @@ static int imx7d_adc_probe(struct platform_device *pdev)
indio_dev->channels = imx7d_adc_iio_channels;
indio_dev->num_channels = ARRAY_SIZE(imx7d_adc_iio_channels);

- ret = clk_prepare_enable(info->clk);
- if (ret) {
- dev_err(dev, "Could not prepare or enable the clock.\n");
- goto error_adc_clk_enable;
- }
-
ret = devm_request_irq(dev, irq,
imx7d_adc_isr, 0,
dev_name(dev), info);
if (ret < 0) {
dev_err(dev, "Failed requesting irq, irq = %d\n", irq);
- goto error_iio_device_register;
+ return ret;
}

imx7d_adc_feature_config(info);
- imx7d_adc_hw_init(info);
+
+ ret = imx7d_adc_enable(&indio_dev->dev);
+ if (ret)
+ return ret;

ret = iio_device_register(indio_dev);
if (ret) {
imx7d_adc_power_down(info);
+ clk_disable_unprepare(info->clk);
+ regulator_disable(info->vref);
dev_err(&pdev->dev, "Couldn't register the device.\n");
- goto error_iio_device_register;
+ return ret;
}

return 0;
-
-error_iio_device_register:
- clk_disable_unprepare(info->clk);
-error_adc_clk_enable:
- regulator_disable(info->vref);
-
- return ret;
}

static int imx7d_adc_remove(struct platform_device *pdev)
@@ -560,34 +571,7 @@ static int __maybe_unused imx7d_adc_suspend(struct device *dev)
return 0;
}

-static int __maybe_unused imx7d_adc_resume(struct device *dev)
-{
- struct iio_dev *indio_dev = dev_get_drvdata(dev);
- struct imx7d_adc *info = iio_priv(indio_dev);
- int ret;
-
- ret = regulator_enable(info->vref);
- if (ret) {
- dev_err(info->dev,
- "Can't enable adc reference top voltage, err = %d\n",
- ret);
- return ret;
- }
-
- ret = clk_prepare_enable(info->clk);
- if (ret) {
- dev_err(info->dev,
- "Could not prepare or enable clock.\n");
- regulator_disable(info->vref);
- return ret;
- }
-
- imx7d_adc_hw_init(info);
-
- return 0;
-}
-
-static SIMPLE_DEV_PM_OPS(imx7d_adc_pm_ops, imx7d_adc_suspend, imx7d_adc_resume);
+static SIMPLE_DEV_PM_OPS(imx7d_adc_pm_ops, imx7d_adc_suspend, imx7d_adc_enable);

static struct platform_driver imx7d_adc_driver = {
.probe = imx7d_adc_probe,
--
2.20.1