From c4e119046f02f88edc34ce7b6a68e69f6df13a0d Mon Sep 17 00:00:00 2001 From: Barry Song Date: Mon, 18 Mar 2013 16:33:43 +0800 Subject: [PATCH] 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 Signed-off-by: Vinod Koul --- drivers/dma/sirf-dma.c | 11 +++++++++++ 1 file changed, 11 insertions(+) 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 #include #include +#include #include #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); -- 2.39.5