From mboxrd@z Thu Jan 1 00:00:00 1970 From: Barry.Song@csr.com (Barry Song) Date: Mon, 18 Mar 2013 16:33:43 +0800 Subject: [PATCH] dmaengine:sirf:take clock and enable it while probing Message-ID: <1363595623-6887-1-git-send-email-Barry.Song@csr.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org From: Barry Song 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 --- drivers/dma/sirf-dma.c | 11 +++++++++++ 1 files changed, 11 insertions(+), 0 deletions(-) diff --git a/drivers/dma/sirf-dma.c b/drivers/dma/sirf-dma.c index 1d627e2..c439529 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); -- 1.7.5.4 Member of the CSR plc group of companies. CSR plc registered in England and Wales, registered number 4187346, registered office Churchill House, Cambridge Business Park, Cowley Road, Cambridge, CB4 0WZ, United Kingdom More information can be found at www.csr.com. Follow CSR on Twitter at http://twitter.com/CSR_PLC and read our blog at www.csr.com/blog