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

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Message-id: <1377517114-20222-3-git-send-email-m.krawczuk@partner.samsung.com>
Date:	Mon, 26 Aug 2013 13:38:31 +0200
From:	Mateusz Krawczuk <m.krawczuk@...tner.samsung.com>
To:	kgene.kim@...sung.com
Cc:	kyungmin.park@...sung.com, t.figa@...sung.com,
	tomasz.figa@...il.com, rob.herring@...xeda.com, pawel.moll@....com,
	mark.rutland@....com, swarren@...dotorg.org,
	ian.campbell@...rix.com, rob@...dley.net, mturquette@...aro.org,
	thomas.abraham@...aro.org, t.stanislaws@...sung.com,
	m.chehab@...sung.com, s.nawrocki@...sung.com,
	m.szyprowski@...ung.com, linux-kernel@...r.kernel.org,
	linux-samsung-soc@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux@....linux.org.uk,
	devicetree@...r.kernel.org, linux-doc@...r.kernel.org,
	Mateusz Krawczuk <m.krawczuk@...tner.samsung.com>
Subject: [PATCH RFC 2/5] media: s5p-tv: Fix mixer 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/mixer_drv.c | 33 +++++++++++++++++++++++++------
 1 file changed, 27 insertions(+), 6 deletions(-)

diff --git a/drivers/media/platform/s5p-tv/mixer_drv.c b/drivers/media/platform/s5p-tv/mixer_drv.c
index 51805a5..f889591 100644
--- a/drivers/media/platform/s5p-tv/mixer_drv.c
+++ b/drivers/media/platform/s5p-tv/mixer_drv.c
@@ -345,21 +345,42 @@ fail:
 
 static int mxr_runtime_resume(struct device *dev)
 {
+	int ret = 0;
 	struct mxr_device *mdev = to_mdev(dev);
 	struct mxr_resources *res = &mdev->res;
 
 	mxr_dbg(mdev, "resume - start\n");
 	mutex_lock(&mdev->mutex);
 	/* turn clocks on */
-	clk_enable(res->mixer);
-	clk_enable(res->vp);
-	clk_enable(res->sclk_mixer);
+	ret = clk_prepare_enable(res->mixer);
+	if (ret < 0) {
+		dev_err(dev, "clk_prepare_enable(mixer) failed\n");
+		goto fail;
+	}
+	ret = clk_prepare_enable(res->vp);
+	if (ret < 0) {
+		dev_err(dev, "clk_prepare_enable(vp) failed\n");
+		goto fail_mixer;
+	}
+	ret = clk_prepare_enable(res->sclk_mixer);
+	if (ret < 0) {
+		dev_err(dev, "clk_prepare_enable(sclk_mixer) failed\n");
+		goto fail_vp;
+	}
 	/* apply default configuration */
 	mxr_reg_reset(mdev);
 	mxr_dbg(mdev, "resume - finished\n");
 
 	mutex_unlock(&mdev->mutex);
 	return 0;
+fail_vp:
+	clk_disable_unprepare(res->vp);
+fail_mixer:
+	clk_disable_unprepare(res->mixer);
+fail:
+	mutex_unlock(&mdev->mutex);
+	dev_info(dev, "resume failed\n");
+	return ret;
 }
 
 static int mxr_runtime_suspend(struct device *dev)
@@ -369,9 +390,9 @@ static int mxr_runtime_suspend(struct device *dev)
 	mxr_dbg(mdev, "suspend - start\n");
 	mutex_lock(&mdev->mutex);
 	/* turn clocks off */
-	clk_disable(res->sclk_mixer);
-	clk_disable(res->vp);
-	clk_disable(res->mixer);
+	clk_disable_unprepare(res->sclk_mixer);
+	clk_disable_unprepare(res->vp);
+	clk_disable_unprepare(res->mixer);
 	mutex_unlock(&mdev->mutex);
 	mxr_dbg(mdev, "suspend - finished\n");
 	return 0;
-- 
1.8.1.2

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