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dmaengine:sirf:take clock and enable it while probing 

there is hardcode which enabled the clock of dmaengine before,
this patch takes the clock by standard clock API and enable it
in probe.

Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Barry Song 2013-03-18 16:33:43 +08:00 committed by Vinod Koul
parent 123b69ab80
commit a7e340657a
1 changed files with 11 additions and 0 deletions
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11
drivers/dma/sirf-dma.c
View File

@ -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);