diff options
| author |   Barry Song <Baohua.Song@csr.com> | 2013-03-18 16:33:43 +0800 |
|---|---|---|
| committer |   Vinod Koul <vinod.koul@intel.com> | 2013-04-15 09:51:18 +0530 |
| commit | a7e340657a04777077a86e235f7074e8e261ac2e (patch) | |
| tree | 5aab7a09e6fd9b96d010caacf600d8208773de72 /drivers/dma/sirf-dma.c | |
| parent | dw_dmac: don't wait for FIFO_EMPTY endlessly in dwc_chan_pause (diff) | |
| download | linux-dev-a7e340657a04777077a86e235f7074e8e261ac2e.tar.xz linux-dev-a7e340657a04777077a86e235f7074e8e261ac2e.zip | |
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>
Diffstat (limited to 'drivers/dma/sirf-dma.c')
| -rw-r--r-- | 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 1d627e2391f4..c4395294dc51 100644 --- a/drivers/dma/sirf-dma.c +++ b/drivers/dma/sirf-dma.c @@ -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); |