dmaengine: omap: add support for cyclic DMA

[deliverable/linux.git] / drivers / dma / mv_xor.c

diff --git a/drivers/dma/mv_xor.c b/drivers/dma/mv_xor.c
index fa5d55fea46cc4829ba55b84a53cb42baafe81c9..0b12e68bf79ca72a238b59e9639a9a3f02f6f3d5 100644 (file)
--- 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 @@ static int mv_xor_shared_probe(struct platform_device *pdev)
        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;
 }