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-rw-r--r--drivers/dma/sirf-dma.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/dma/sirf-dma.c b/drivers/dma/sirf-dma.c
index 1d627e2391f4..c4395294dc51 100644
--- a/drivers/dma/sirf-dma.c
+++ b/drivers/dma/sirf-dma.c
@@ -16,6 +16,7 @@
#include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/of_platform.h>
+#include <linux/clk.h>
#include <linux/sirfsoc_dma.h>
#include "dmaengine.h"
@@ -78,6 +79,7 @@ struct sirfsoc_dma {
struct sirfsoc_dma_chan channels[SIRFSOC_DMA_CHANNELS];
void __iomem *base;
int irq;
+ struct clk *clk;
bool is_marco;
};
@@ -639,6 +641,12 @@ static int sirfsoc_dma_probe(struct platform_device *op)
return -EINVAL;
}
+ sdma->clk = devm_clk_get(dev, NULL);
+ if (IS_ERR(sdma->clk)) {
+ dev_err(dev, "failed to get a clock.\n");
+ return PTR_ERR(sdma->clk);
+ }
+
ret = of_address_to_resource(dn, 0, &res);
if (ret) {
dev_err(dev, "Error parsing memory region!\n");
@@ -698,6 +706,8 @@ static int sirfsoc_dma_probe(struct platform_device *op)
tasklet_init(&sdma->tasklet, sirfsoc_dma_tasklet, (unsigned long)sdma);
+ clk_prepare_enable(sdma->clk);
+
/* Register DMA engine */
dev_set_drvdata(dev, sdma);
ret = dma_async_device_register(dma);
@@ -720,6 +730,7 @@ static int sirfsoc_dma_remove(struct platform_device *op)
struct device *dev = &op->dev;
struct sirfsoc_dma *sdma = dev_get_drvdata(dev);
+ clk_disable_unprepare(sdma->clk);
dma_async_device_unregister(&sdma->dma);
free_irq(sdma->irq, sdma);
irq_dispose_mapping(sdma->irq);