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authorNiklas Söderlund <niklas.soderlund+renesas@ragnatech.se>2017-05-16 02:09:15 +0300
committerVinod Koul <vinod.koul@intel.com>2017-05-19 12:25:23 +0300
commit427d5ecd270bad5b9ba15a42f0414accdfa4e2f8 (patch)
tree7b0119da1b4eb9853925202f7216fadc6c307e9c /drivers/dma/sh
parent2ea659a9ef488125eb46da6eb571de5eae5c43f6 (diff)
downloadlinux-427d5ecd270bad5b9ba15a42f0414accdfa4e2f8.tar.xz
dmaengine: rcar-dmac: store channel IRQ in struct rcar_dmac_chan
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>
Diffstat (limited to 'drivers/dma/sh')
-rw-r--r--drivers/dma/sh/rcar-dmac.c13
1 files changed, 8 insertions, 5 deletions
diff --git a/drivers/dma/sh/rcar-dmac.c b/drivers/dma/sh/rcar-dmac.c
index db41795fe42a..c68c3336bdad 100644
--- a/drivers/dma/sh/rcar-dmac.c
+++ b/drivers/dma/sh/rcar-dmac.c
@@ -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;
}