[PATCH 2/2] rcar-hpbdma: add parameter to set_slave() method

Sergei Shtylyov
2013-09-25T22:31:35Z

Commit 4981c4dc194efb18f0e9a02f1b43e926f2f0d2bb (DMA: shdma: switch DT mode to
use configuration data from a match table) added a new parameter to set_slave()
method but unfortunately got merged later than commit c4f6c41ba790bbbfcebb4c47a
(dma: add driver for R-Car HPB-DMAC), so that the HPB-DMAC driver retained the
old prototype which caused this warning:

drivers/dma/sh/rcar-hpbdma.c:485: warning: initialization from incompatible
pointer type

The newly added parameter is used to override DMA slave address from 'struct
hpb_dmae_slave_config', so we have to add the 'slave_addr' field to 'struct
hpb_dmae_chan', conditionally assign it in set_slave() method, and return in
slave_addr() method.

Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>

---
The patch is against 'fixes-3.12' branch of Vinod Koul's 'slave-dma.git' repo.

drivers/dma/sh/rcar-hpbdma.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)

Index: slave-dma/drivers/dma/sh/rcar-hpbdma.c
===================================================================
--- slave-dma.orig/drivers/dma/sh/rcar-hpbdma.c
+++ slave-dma/drivers/dma/sh/rcar-hpbdma.c
@@ -93,6 +93,7 @@ struct hpb_dmae_chan {
void __iomem *base;
const struct hpb_dmae_slave_config *cfg;
char dev_id[16]; /* unique name per DMAC of channel */
+ dma_addr_t slave_addr;
};

struct hpb_dmae_device {
@@ -445,7 +446,8 @@ hpb_dmae_alloc_chan_resources(struct hpb
return 0;
}

-static int hpb_dmae_set_slave(struct shdma_chan *schan, int slave_id, bool try)
+static int hpb_dmae_set_slave(struct shdma_chan *schan, int slave_id,
+ dma_addr_t slave_addr, bool try)
{
struct hpb_dmae_chan *chan = to_chan(schan);
const struct hpb_dmae_slave_config *sc =
@@ -456,6 +458,7 @@ static int hpb_dmae_set_slave(struct shd
if (try)
return 0;
chan->cfg = sc;
+ chan->slave_addr = slave_addr ? : sc->addr;
return hpb_dmae_alloc_chan_resources(chan, sc);
}

@@ -467,7 +470,7 @@ static dma_addr_t hpb_dmae_slave_addr(st
{
struct hpb_dmae_chan *chan = to_chan(schan);

- return chan->cfg->addr;
+ return chan->slave_addr;
}

static struct shdma_desc *hpb_dmae_embedded_desc(void *buf, int i)