Commit a7e34065 authored by Barry Song's avatar Barry Song Committed by Vinod Koul
Browse files

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: default avatarBarry Song <Baohua.Song@csr.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
parent 123b69ab

drivers/dma/sirf-dma.c

+11 −0
Original line number Diff line number Diff line
@@ -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);