dma: dw: allow shared interrupts
In the PC world is quite possible that devices are sharing the same interrupt line. The patch prepares dw_dmac driver to such cases. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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@ -650,10 +650,13 @@ static void dw_dma_tasklet(unsigned long data)
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static irqreturn_t dw_dma_interrupt(int irq, void *dev_id)
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{
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struct dw_dma *dw = dev_id;
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u32 status;
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u32 status = dma_readl(dw, STATUS_INT);
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dev_vdbg(dw->dma.dev, "%s: status=0x%x\n", __func__,
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dma_readl(dw, STATUS_INT));
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dev_vdbg(dw->dma.dev, "%s: status=0x%x\n", __func__, status);
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/* Check if we have any interrupt from the DMAC */
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if (!status)
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return IRQ_NONE;
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/*
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* Just disable the interrupts. We'll turn them back on in the
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@ -1566,8 +1569,8 @@ int dw_dma_probe(struct dw_dma_chip *chip, struct dw_dma_platform_data *pdata)
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/* Disable BLOCK interrupts as well */
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channel_clear_bit(dw, MASK.BLOCK, dw->all_chan_mask);
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err = devm_request_irq(chip->dev, chip->irq, dw_dma_interrupt, 0,
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"dw_dmac", dw);
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err = devm_request_irq(chip->dev, chip->irq, dw_dma_interrupt,
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IRQF_SHARED, "dw_dmac", dw);
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if (err)
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return err;
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