On runtime PM aware platforms the DMA have to manage its own power state. This patch enables runtime PM support and applies necessary calls wherever it's needed. Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> --- drivers/dma/dw/core.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/dma/dw/core.c b/drivers/dma/dw/core.c index 2447221..3804785 100644 --- a/drivers/dma/dw/core.c +++ b/drivers/dma/dw/core.c @@ -22,6 +22,7 @@ #include <linux/mm.h> #include <linux/module.h> #include <linux/slab.h> +#include <linux/pm_runtime.h> #include "../dmaengine.h" #include "internal.h" @@ -1504,6 +1505,9 @@ int dw_dma_probe(struct dw_dma_chip *chip, struct dw_dma_platform_data *pdata) dw->regs = chip->regs; chip->dw = dw; + pm_runtime_enable(chip->dev); + pm_runtime_get_sync(chip->dev); + dw_params = dma_read_byaddr(chip->regs, DW_PARAMS); autocfg = dw_params >> DW_PARAMS_EN & 0x1; @@ -1667,11 +1671,14 @@ int dw_dma_probe(struct dw_dma_chip *chip, struct dw_dma_platform_data *pdata) dev_info(chip->dev, "DesignWare DMA Controller, %d channels\n", nr_channels); + pm_runtime_put_sync_suspend(chip->dev); + return 0; err_dma_register: free_irq(chip->irq, dw); err_pdata: + pm_runtime_put_sync_suspend(chip->dev); return err; } EXPORT_SYMBOL_GPL(dw_dma_probe); @@ -1681,6 +1688,8 @@ int dw_dma_remove(struct dw_dma_chip *chip) struct dw_dma *dw = chip->dw; struct dw_dma_chan *dwc, *_dwc; + pm_runtime_get_sync(chip->dev); + dw_dma_off(dw); dma_async_device_unregister(&dw->dma); @@ -1693,6 +1702,8 @@ int dw_dma_remove(struct dw_dma_chip *chip) channel_clear_bit(dw, CH_EN, dwc->mask); } + pm_runtime_put_sync_suspend(chip->dev); + pm_runtime_disable(chip->dev); return 0; } EXPORT_SYMBOL_GPL(dw_dma_remove); -- 2.1.1 -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
