linux-kernel - [PATCH] spi: pl022: Add clk_{un}prepare() support in runtime PM

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Date:	Mon, 17 Sep 2012 16:07:10 +0530
From:	Vipul Kumar Samar <vipulkumar.samar@...com>
To:	<grant.likely@...retlab.ca>,
	<spi-devel-general@...ts.sourceforge.net>
Cc:	<linux-arm-kernel@...ts.infradead.org>, <spear-devel@...t.st.com>,
	<linux-kernel@...r.kernel.org>, <linus.walleij@...aro.org>,
	Vipul Kumar Samar <vipulkumar.samar@...com>
Subject: [PATCH] spi: pl022:  Add clk_{un}prepare() support in runtime PM

clk_{un}prepare is mandatory for platforms using common clock framework. Add
clk_{un}prepare() support for spi-pl022 runtime PM.

Signed-off-by: Vipul Kumar Samar <vipulkumar.samar@...com>
---
 drivers/spi/spi-pl022.c |    9 ++++++---
 1 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/spi/spi-pl022.c b/drivers/spi/spi-pl022.c
index f2a80ff..500e75e 100644
--- a/drivers/spi/spi-pl022.c
+++ b/drivers/spi/spi-pl022.c
@@ -2334,7 +2334,7 @@ static int pl022_runtime_suspend(struct device *dev)
 {
 	struct pl022 *pl022 = dev_get_drvdata(dev);
 
-	clk_disable(pl022->clk);
+	clk_disable_unprepare(pl022->clk);
 
 	return 0;
 }
@@ -2342,10 +2342,13 @@ static int pl022_runtime_suspend(struct device *dev)
 static int pl022_runtime_resume(struct device *dev)
 {
 	struct pl022 *pl022 = dev_get_drvdata(dev);
+	int ret = 0;
 
-	clk_enable(pl022->clk);
+	ret = clk_prepare_enable(pl022->clk);
+	if (ret)
+		dev_err(dev, "could not enable SSP/SPI bus clock\n");
 
-	return 0;
+	return ret;
 }
 #endif
 
-- 
1.7.2.2

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