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dmaengine: rcar-dmac: store channel IRQ in struct rcar_dmac_chan

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The IRQ number is needed after probe to be able to add synchronisation
points in other places in the driver when freeing resources and to
implement a device_synchronize() callback. Store the IRQ number in the
struct rcar_dmac_chan so that it can be used later.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Niklas Söderlund 2017-05-16 01:09:15 +02:00 committed by Vinod Koul
parent 2ea659a9ef
commit 427d5ecd27
1 changed files with 8 additions and 5 deletions
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13
drivers/dma/sh/rcar-dmac.c
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@ -144,6 +144,7 @@ struct rcar_dmac_chan_map {
* @chan: base DMA channel object
* @iomem: channel I/O memory base
* @index: index of this channel in the controller
* @irq: channel IRQ
* @src: slave memory address and size on the source side
* @dst: slave memory address and size on the destination side
* @mid_rid: hardware MID/RID for the DMA client using this channel
@ -161,6 +162,7 @@ struct rcar_dmac_chan {
struct dma_chan chan;
void __iomem *iomem;
unsigned int index;
int irq;
struct rcar_dmac_chan_slave src;
struct rcar_dmac_chan_slave dst;
@ -1647,7 +1649,6 @@ static int rcar_dmac_chan_probe(struct rcar_dmac *dmac,
struct dma_chan *chan = &rchan->chan;
char pdev_irqname[5];
char *irqname;
int irq;
int ret;
rchan->index = index;
@ -1664,8 +1665,8 @@ static int rcar_dmac_chan_probe(struct rcar_dmac *dmac,
/* Request the channel interrupt. */
sprintf(pdev_irqname, "ch%u", index);
irq = platform_get_irq_byname(pdev, pdev_irqname);
if (irq < 0) {
rchan->irq = platform_get_irq_byname(pdev, pdev_irqname);
if (rchan->irq < 0) {
dev_err(dmac->dev, "no IRQ specified for channel %u\n", index);
return -ENODEV;
}
@ -1675,11 +1676,13 @@ static int rcar_dmac_chan_probe(struct rcar_dmac *dmac,
if (!irqname)
return -ENOMEM;
ret = devm_request_threaded_irq(dmac->dev, irq, rcar_dmac_isr_channel,
ret = devm_request_threaded_irq(dmac->dev, rchan->irq,
rcar_dmac_isr_channel,
rcar_dmac_isr_channel_thread, 0,
irqname, rchan);
if (ret) {
dev_err(dmac->dev, "failed to request IRQ %u (%d)\n", irq, ret);
dev_err(dmac->dev, "failed to request IRQ %u (%d)\n",
rchan->irq, ret);
return ret;
}