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dmaengine: rcar-dmac: Add support for R-Car S4-8

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Add support for R-Car S4-8. We can reuse R-Car V3U code so that
renames variable names as "gen4".

Note that some registers of R-Car V3U do not exist on R-Car S4-8,
but none of them are used by the driver for now.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Ulrich Hecht <uli+renesas@fpond.eu>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20211222114507.1252947-3-yoshihiro.shimoda.uh@renesas.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Yoshihiro Shimoda 2021-12-22 20:45:07 +09:00 committed by Vinod Koul
parent 401c151164
commit 2fe6777b8d
1 changed files with 10 additions and 7 deletions
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17
drivers/dma/sh/rcar-dmac.c
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@ -236,7 +236,7 @@ struct rcar_dmac_of_data {
#define RCAR_DMAOR_PRI_ROUND_ROBIN (3 << 8)
#define RCAR_DMAOR_AE (1 << 2)
#define RCAR_DMAOR_DME (1 << 0)
#define RCAR_DMACHCLR 0x0080 /* Not on R-Car V3U */
#define RCAR_DMACHCLR 0x0080 /* Not on R-Car Gen4 */
#define RCAR_DMADPSEC 0x00a0
#define RCAR_DMASAR 0x0000
@ -299,8 +299,8 @@ struct rcar_dmac_of_data {
#define RCAR_DMAFIXDAR 0x0014
#define RCAR_DMAFIXDPBASE 0x0060
/* For R-Car V3U */
#define RCAR_V3U_DMACHCLR 0x0100
/* For R-Car Gen4 */
#define RCAR_GEN4_DMACHCLR 0x0100
/* Hardcode the MEMCPY transfer size to 4 bytes. */
#define RCAR_DMAC_MEMCPY_XFER_SIZE 4
@ -345,7 +345,7 @@ static void rcar_dmac_chan_clear(struct rcar_dmac *dmac,
struct rcar_dmac_chan *chan)
{
if (dmac->chan_base)
rcar_dmac_chan_write(chan, RCAR_V3U_DMACHCLR, 1);
rcar_dmac_chan_write(chan, RCAR_GEN4_DMACHCLR, 1);
else
rcar_dmac_write(dmac, RCAR_DMACHCLR, BIT(chan->index));
}
@ -357,7 +357,7 @@ static void rcar_dmac_chan_clear_all(struct rcar_dmac *dmac)
if (dmac->chan_base) {
for_each_rcar_dmac_chan(i, dmac, chan)
rcar_dmac_chan_write(chan, RCAR_V3U_DMACHCLR, 1);
rcar_dmac_chan_write(chan, RCAR_GEN4_DMACHCLR, 1);
} else {
rcar_dmac_write(dmac, RCAR_DMACHCLR, dmac->channels_mask);
}
@ -2009,7 +2009,7 @@ static const struct rcar_dmac_of_data rcar_dmac_data = {
.chan_offset_stride = 0x80,
};
static const struct rcar_dmac_of_data rcar_v3u_dmac_data = {
static const struct rcar_dmac_of_data rcar_gen4_dmac_data = {
.chan_offset_base = 0x0,
.chan_offset_stride = 0x1000,
};
@ -2018,9 +2018,12 @@ static const struct of_device_id rcar_dmac_of_ids[] = {
{
.compatible = "renesas,rcar-dmac",
.data = &rcar_dmac_data,
}, {
.compatible = "renesas,rcar-gen4-dmac",
.data = &rcar_gen4_dmac_data,
}, {
.compatible = "renesas,dmac-r8a779a0",
.data = &rcar_v3u_dmac_data,
.data = &rcar_gen4_dmac_data,
},
{ /* Sentinel */ }
};