ARM: Orion: XOR: Add support for clk
Some orion platforms can gate the XOR driver clock. If the clock
exisits, unable/disable it as appropriate.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Tested-by: Jamie Lentin <jm@lentin.co.uk>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
diff --git a/drivers/dma/mv_xor.c b/drivers/dma/mv_xor.c
index fa5d55f..0b12e68 100644
--- a/drivers/dma/mv_xor.c
+++ b/drivers/dma/mv_xor.c
@@ -25,6 +25,7 @@
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/memory.h>
+#include <linux/clk.h>
#include <plat/mv_xor.h>
#include "dmaengine.h"
@@ -1307,11 +1308,25 @@
if (dram)
mv_xor_conf_mbus_windows(msp, dram);
+ /* Not all platforms can gate the clock, so it is not
+ * an error if the clock does not exists.
+ */
+ msp->clk = clk_get(&pdev->dev, NULL);
+ if (!IS_ERR(msp->clk))
+ clk_prepare_enable(msp->clk);
+
return 0;
}
static int mv_xor_shared_remove(struct platform_device *pdev)
{
+ struct mv_xor_shared_private *msp = platform_get_drvdata(pdev);
+
+ if (!IS_ERR(msp->clk)) {
+ clk_disable_unprepare(msp->clk);
+ clk_put(msp->clk);
+ }
+
return 0;
}