linux-kernel - [PATCH 2/7] iio: adc: rockchip_saradc: Make use of devm_clk_get

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Message-Id: <20230516230051.14846-3-shreeya.patel@collabora.com>
Date:   Wed, 17 May 2023 04:30:46 +0530
From:   Shreeya Patel <shreeya.patel@...labora.com>
To:     jic23@...nel.org, lars@...afoo.de, heiko@...ech.de,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        sebastian.reichel@...labora.com
Cc:     linux-iio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
        kernel@...labora.com, gustavo.padovan@...labora.com,
        serge.broslavsky@...labora.com,
        Shreeya Patel <shreeya.patel@...labora.com>
Subject: [PATCH 2/7] iio: adc: rockchip_saradc: Make use of devm_clk_get_enabled

Use devm_clk_get_enabled() to avoid manually disabling the
clock.

Signed-off-by: Shreeya Patel <shreeya.patel@...labora.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