From bb32baf76e56cdb348633f4d789a93e81b975c47 Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Wed, 5 Nov 2014 18:34:48 +0200 Subject: dmaengine: dw: enable runtime PM 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 Acked-by: Vinod Koul Tested-by: Scott Ashcroft Signed-off-by: Rafael J. Wysocki --- drivers/dma/dw/core.c | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'drivers/dma/dw') diff --git a/drivers/dma/dw/core.c b/drivers/dma/dw/core.c index 244722170410..380478562b7d 100644 --- a/drivers/dma/dw/core.c +++ b/drivers/dma/dw/core.c @@ -22,6 +22,7 @@ #include #include #include +#include #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); -- cgit v1.2.3-59-g8ed1b