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 <andriy.shevchenko@linux.intel.com> Acked-by: Vinod Koul <vinod.koul@intel.com> Tested-by: Scott Ashcroft <scott.ashcroft@talk21.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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@ -22,6 +22,7 @@
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#include <linux/mm.h>
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#include <linux/mm.h>
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#include <linux/module.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/slab.h>
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#include <linux/pm_runtime.h>
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#include "../dmaengine.h"
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#include "../dmaengine.h"
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#include "internal.h"
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#include "internal.h"
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@ -1504,6 +1505,9 @@ int dw_dma_probe(struct dw_dma_chip *chip, struct dw_dma_platform_data *pdata)
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dw->regs = chip->regs;
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dw->regs = chip->regs;
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chip->dw = dw;
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chip->dw = dw;
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pm_runtime_enable(chip->dev);
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pm_runtime_get_sync(chip->dev);
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dw_params = dma_read_byaddr(chip->regs, DW_PARAMS);
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dw_params = dma_read_byaddr(chip->regs, DW_PARAMS);
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autocfg = dw_params >> DW_PARAMS_EN & 0x1;
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autocfg = dw_params >> DW_PARAMS_EN & 0x1;
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@ -1667,11 +1671,14 @@ int dw_dma_probe(struct dw_dma_chip *chip, struct dw_dma_platform_data *pdata)
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dev_info(chip->dev, "DesignWare DMA Controller, %d channels\n",
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dev_info(chip->dev, "DesignWare DMA Controller, %d channels\n",
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nr_channels);
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nr_channels);
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pm_runtime_put_sync_suspend(chip->dev);
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return 0;
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return 0;
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err_dma_register:
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err_dma_register:
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free_irq(chip->irq, dw);
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free_irq(chip->irq, dw);
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err_pdata:
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err_pdata:
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pm_runtime_put_sync_suspend(chip->dev);
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return err;
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return err;
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}
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}
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EXPORT_SYMBOL_GPL(dw_dma_probe);
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EXPORT_SYMBOL_GPL(dw_dma_probe);
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@ -1681,6 +1688,8 @@ int dw_dma_remove(struct dw_dma_chip *chip)
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struct dw_dma *dw = chip->dw;
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struct dw_dma *dw = chip->dw;
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struct dw_dma_chan *dwc, *_dwc;
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struct dw_dma_chan *dwc, *_dwc;
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pm_runtime_get_sync(chip->dev);
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dw_dma_off(dw);
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dw_dma_off(dw);
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dma_async_device_unregister(&dw->dma);
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dma_async_device_unregister(&dw->dma);
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@ -1693,6 +1702,8 @@ int dw_dma_remove(struct dw_dma_chip *chip)
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channel_clear_bit(dw, CH_EN, dwc->mask);
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channel_clear_bit(dw, CH_EN, dwc->mask);
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}
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}
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pm_runtime_put_sync_suspend(chip->dev);
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pm_runtime_disable(chip->dev);
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return 0;
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return 0;
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}
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}
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EXPORT_SYMBOL_GPL(dw_dma_remove);
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EXPORT_SYMBOL_GPL(dw_dma_remove);
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