dmaengine:sirf:take clock and enable it while probing (a7e34065) · Commits · 戴 / test

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);