[PATCH 2/7] iio: adc: rockchip_saradc: Make use of devm_clk_get_enabled

Shreeya Patel
2023-05-16T23:03:15Z

Use devm_clk_get_enabled() to avoid manually disabling the
clock.

Signed-off-by: Shreeya Patel <shreeya.patel@collabora.com>
---
drivers/iio/adc/rockchip_saradc.c | 77 +++++--------------------------
1 file changed, 11 insertions(+), 66 deletions(-)

diff --git a/drivers/iio/adc/rockchip_saradc.c b/drivers/iio/adc/rockchip_saradc.c
index ac6fdf8e673b..05b66eff9a44 100644
--- a/drivers/iio/adc/rockchip_saradc.c
+++ b/drivers/iio/adc/rockchip_saradc.c
@@ -339,20 +339,6 @@ static void rockchip_saradc_reset_controller(struct reset_control *reset)
reset_control_deassert(reset);
}

-static void rockchip_saradc_clk_disable(void *data)
-{
- struct rockchip_saradc *info = data;
-
- clk_disable_unprepare(info->clk);
-}
-
-static void rockchip_saradc_pclk_disable(void *data)
-{
- struct rockchip_saradc *info = data;
-
- clk_disable_unprepare(info->pclk);
-}
-
static void rockchip_saradc_regulator_disable(void *data)
{
struct rockchip_saradc *info = data;
@@ -486,16 +472,6 @@ static int rockchip_saradc_probe(struct platform_device *pdev)
return ret;
}

- info->pclk = devm_clk_get(&pdev->dev, "apb_pclk");
- if (IS_ERR(info->pclk))
- return dev_err_probe(&pdev->dev, PTR_ERR(info->pclk),
- "failed to get pclk\n");
-
- info->clk = devm_clk_get(&pdev->dev, "saradc");
- if (IS_ERR(info->clk))
- return dev_err_probe(&pdev->dev, PTR_ERR(info->clk),
- "failed to get adc clock\n");
-
info->vref = devm_regulator_get(&pdev->dev, "vref");
if (IS_ERR(info->vref))
return dev_err_probe(&pdev->dev, PTR_ERR(info->vref),
@@ -504,6 +480,16 @@ static int rockchip_saradc_probe(struct platform_device *pdev)
if (info->reset)
rockchip_saradc_reset_controller(info->reset);

+ info->pclk = devm_clk_get_enabled(&pdev->dev, "apb_pclk");
+ if (IS_ERR(info->pclk))
+ return dev_err_probe(&pdev->dev, PTR_ERR(info->pclk),
+ "failed to get pclk\n");
+
+ info->clk = devm_clk_get_enabled(&pdev->dev, "saradc");
+ if (IS_ERR(info->clk))
+ return dev_err_probe(&pdev->dev, PTR_ERR(info->clk),
+ "failed to get adc clock\n");
+
/*
* Use a default value for the converter clock.
* This may become user-configurable in the future.
@@ -533,32 +519,6 @@ static int rockchip_saradc_probe(struct platform_device *pdev)

info->uv_vref = ret;

- ret = clk_prepare_enable(info->pclk);
- if (ret < 0) {
- dev_err(&pdev->dev, "failed to enable pclk\n");
- return ret;
- }
- ret = devm_add_action_or_reset(&pdev->dev,
- rockchip_saradc_pclk_disable, info);
- if (ret) {
- dev_err(&pdev->dev, "failed to register devm action, %d\n",
- ret);
- return ret;
- }
-
- ret = clk_prepare_enable(info->clk);
- if (ret < 0) {
- dev_err(&pdev->dev, "failed to enable converter clock\n");
- return ret;
- }
- ret = devm_add_action_or_reset(&pdev->dev,
- rockchip_saradc_clk_disable, info);
- if (ret) {
- dev_err(&pdev->dev, "failed to register devm action, %d\n",
- ret);
- return ret;
- }
-
platform_set_drvdata(pdev, indio_dev);

indio_dev->name = dev_name(&pdev->dev);
@@ -594,8 +554,6 @@ static int rockchip_saradc_suspend(struct device *dev)
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct rockchip_saradc *info = iio_priv(indio_dev);

- clk_disable_unprepare(info->clk);
- clk_disable_unprepare(info->pclk);
regulator_disable(info->vref);

return 0;
@@ -605,21 +563,8 @@ static int rockchip_saradc_resume(struct device *dev)
{
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct rockchip_saradc *info = iio_priv(indio_dev);
- int ret;
-
- ret = regulator_enable(info->vref);
- if (ret)
- return ret;
-
- ret = clk_prepare_enable(info->pclk);
- if (ret)
- return ret;
-
- ret = clk_prepare_enable(info->clk);
- if (ret)
- clk_disable_unprepare(info->pclk);

- return ret;
+ return regulator_enable(info->vref);
}

static DEFINE_SIMPLE_DEV_PM_OPS(rockchip_saradc_pm_ops,
--
2.30.2