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dmaengine: rcar-dmac: Use of_data values instead of a macro

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Since we will have changed memory mapping of the DMAC in the future,
this patch uses of_data values instead of a macro to calculate
each channel's base offset.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Link: https://lore.kernel.org/r/1568010892-17606-3-git-send-email-yoshihiro.shimoda.uh@renesas.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Yoshihiro Shimoda 2019-09-09 15:34:50 +09:00 committed by Vinod Koul
parent 6735ab500b
commit 2df4a02a9c
1 changed files with 28 additions and 5 deletions
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33
drivers/dma/sh/rcar-dmac.c
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@ -210,12 +210,20 @@ struct rcar_dmac {
#define to_rcar_dmac(d) container_of(d, struct rcar_dmac, engine)
/*
* struct rcar_dmac_of_data - This driver's OF data
* @chan_offset_base: DMAC channels base offset
* @chan_offset_stride: DMAC channels offset stride
*/
struct rcar_dmac_of_data {
u32 chan_offset_base;
u32 chan_offset_stride;
};
/* -----------------------------------------------------------------------------
* Registers
*/
#define RCAR_DMAC_CHAN_OFFSET(i) (0x8000 + 0x80 * (i))
#define RCAR_DMAISTA 0x0020
#define RCAR_DMASEC 0x0030
#define RCAR_DMAOR 0x0060
@ -1726,6 +1734,7 @@ static const struct dev_pm_ops rcar_dmac_pm = {
static int rcar_dmac_chan_probe(struct rcar_dmac *dmac,
struct rcar_dmac_chan *rchan,
const struct rcar_dmac_of_data *data,
unsigned int index)
{
struct platform_device *pdev = to_platform_device(dmac->dev);
@ -1735,7 +1744,8 @@ static int rcar_dmac_chan_probe(struct rcar_dmac *dmac,
int ret;
rchan->index = index;
rchan->iomem = dmac->iomem + RCAR_DMAC_CHAN_OFFSET(index);
rchan->iomem = dmac->iomem + data->chan_offset_base +
data->chan_offset_stride * index;
rchan->mid_rid = -EINVAL;
spin_lock_init(&rchan->lock);
@ -1813,10 +1823,15 @@ static int rcar_dmac_probe(struct platform_device *pdev)
DMA_SLAVE_BUSWIDTH_32_BYTES | DMA_SLAVE_BUSWIDTH_64_BYTES;
struct dma_device *engine;
struct rcar_dmac *dmac;
const struct rcar_dmac_of_data *data;
struct resource *mem;
unsigned int i;
int ret;
data = of_device_get_match_data(&pdev->dev);
if (!data)
return -EINVAL;
dmac = devm_kzalloc(&pdev->dev, sizeof(*dmac), GFP_KERNEL);
if (!dmac)
return -ENOMEM;
@ -1901,7 +1916,7 @@ static int rcar_dmac_probe(struct platform_device *pdev)
if (!(dmac->channels_mask & BIT(i)))
continue;
ret = rcar_dmac_chan_probe(dmac, &dmac->channels[i], i);
ret = rcar_dmac_chan_probe(dmac, &dmac->channels[i], data, i);
if (ret < 0)
goto error;
}
@ -1948,8 +1963,16 @@ static void rcar_dmac_shutdown(struct platform_device *pdev)
rcar_dmac_stop_all_chan(dmac);
}
static const struct rcar_dmac_of_data rcar_dmac_data = {
.chan_offset_base = 0x8000,
.chan_offset_stride = 0x80,
};
static const struct of_device_id rcar_dmac_of_ids[] = {
{ .compatible = "renesas,rcar-dmac", },
{
.compatible = "renesas,rcar-dmac",
.data = &rcar_dmac_data,
},
{ /* Sentinel */ }
};
MODULE_DEVICE_TABLE(of, rcar_dmac_of_ids);