linux-kernel - [PATCH v2 2/5] media: s5p-tv: Fix sdo driver to work with CCF

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Date:	Wed, 28 Aug 2013 15:34:29 +0200
From:	Mateusz Krawczuk <m.krawczuk@...tner.samsung.com>
To:	kyungmin.park@...sung.com
Cc:	t.stanislaws@...sung.com, m.chehab@...sung.com,
	linux-arm-kernel@...ts.infradead.org, linux-media@...r.kernel.org,
	linux-kernel@...r.kernel.org, rob.herring@...xeda.com,
	pawel.moll@....com, mark.rutland@....com, swarren@...dotorg.org,
	ian.campbell@...rix.com, rob@...dley.net, mturquette@...aro.org,
	tomasz.figa@...il.com, kgene.kim@...sung.com,
	thomas.abraham@...aro.org, s.nawrocki@...sung.com,
	devicetree@...r.kernel.org, linux-doc@...r.kernel.org,
	linux@....linux.org.uk, ben-linux@...ff.org,
	linux-samsung-soc@...r.kernel.org,
	Mateusz Krawczuk <m.krawczuk@...tner.samsung.com>
Subject: [PATCH v2 2/5] media: s5p-tv: Fix sdo driver to work with CCF

Replace clk_enable by clock_enable_prepare and clk_disable with clk_disable_unprepare.
Clock prepare is required by Clock Common Framework, and old clock driver didn`t support it.
Without it Common Clock Framework prints a warning.

Signed-off-by: Mateusz Krawczuk <m.krawczuk@...tner.samsung.com>
---
 drivers/media/platform/s5p-tv/sdo_drv.c | 21 +++++++++++++--------
 1 file changed, 13 insertions(+), 8 deletions(-)

diff --git a/drivers/media/platform/s5p-tv/sdo_drv.c b/drivers/media/platform/s5p-tv/sdo_drv.c
index b919008..acdae6b 100644
--- a/drivers/media/platform/s5p-tv/sdo_drv.c
+++ b/drivers/media/platform/s5p-tv/sdo_drv.c
@@ -230,7 +230,7 @@ static int sdo_streamoff(struct sdo_device *sdev)
 	int tries;
 
 	sdo_write_mask(sdev, SDO_DAC, 0, SDO_POWER_ON_DAC);
-	clk_disable(sdev->dacphy);
+	clk_disable_unprepare(sdev->dacphy);
 	sdo_write_mask(sdev, SDO_CLKCON, 0, SDO_TVOUT_CLOCK_ON);
 	for (tries = 100; tries; --tries) {
 		if (sdo_read(sdev, SDO_CLKCON) & SDO_TVOUT_CLOCK_READY)
@@ -274,7 +274,7 @@ static int sdo_runtime_suspend(struct device *dev)
 	dev_info(dev, "suspend\n");
 	regulator_disable(sdev->vdet);
 	regulator_disable(sdev->vdac);
-	clk_disable(sdev->sclk_dac);
+	clk_disable_unprepare(sdev->sclk_dac);
 	return 0;
 }
 
@@ -286,7 +286,7 @@ static int sdo_runtime_resume(struct device *dev)
 
 	dev_info(dev, "resume\n");
 
-	ret = clk_enable(sdev->sclk_dac);
+	ret = clk_prepare_enable(sdev->sclk_dac);
 	if (ret < 0)
 		return ret;
 
@@ -319,7 +319,7 @@ static int sdo_runtime_resume(struct device *dev)
 vdac_r_dis:
 	regulator_disable(sdev->vdac);
 dac_clk_dis:
-	clk_disable(sdev->sclk_dac);
+	clk_disable_unprepare(sdev->sclk_dac);
 	return ret;
 }
 
@@ -333,7 +333,7 @@ static int sdo_probe(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	struct sdo_device *sdev;
 	struct resource *res;
-	int ret = 0;
+	int ret;
 	struct clk *sclk_vpll;
 
 	dev_info(dev, "probe start\n");
@@ -425,8 +425,13 @@ static int sdo_probe(struct platform_device *pdev)
 	}
 
 	/* enable gate for dac clock, because mixer uses it */
-	clk_enable(sdev->dac);
-
+	clk_prepare_enable(sdev->dac);
+	if (IS_ERR(sdev->dac)) {
+		dev_err(dev,
+			"%s: Failed to prepare and enable clock !\n", __func__);
+		ret = PTR_ERR(sdev->dac);
+		goto fail_fout_vpll;
+	}
 	/* configure power management */
 	pm_runtime_enable(dev);
 
@@ -464,7 +469,7 @@ static int sdo_remove(struct platform_device *pdev)
 	struct sdo_device *sdev = sd_to_sdev(sd);
 
 	pm_runtime_disable(&pdev->dev);
-	clk_disable(sdev->dac);
+	clk_disable_unprepare(sdev->dac);
 	clk_put(sdev->fout_vpll);
 	clk_put(sdev->dacphy);
 	clk_put(sdev->dac);
-- 
1.8.1.2

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