diff options
Diffstat (limited to 'drivers/dma/sirf-dma.c')
| -rw-r--r-- | drivers/dma/sirf-dma.c | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/drivers/dma/sirf-dma.c b/drivers/dma/sirf-dma.c index 1d627e2391f..1765a0a2736 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); @@ -742,7 +753,18 @@ static struct platform_driver sirfsoc_dma_driver = { }, }; -module_platform_driver(sirfsoc_dma_driver); +static __init int sirfsoc_dma_init(void) +{ + return platform_driver_register(&sirfsoc_dma_driver); +} + +static void __exit sirfsoc_dma_exit(void) +{ + platform_driver_unregister(&sirfsoc_dma_driver); +} + +subsys_initcall(sirfsoc_dma_init); +module_exit(sirfsoc_dma_exit); MODULE_AUTHOR("Rongjun Ying <rongjun.ying@csr.com>, " "Barry Song <baohua.song@csr.com>"); |