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| author | Geert Uytterhoeven <geert+renesas@glider.be> | 2014-08-06 14:59:01 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@linaro.org> | 2014-08-17 00:14:09 +0200 |
| commit | a30b95a7d81cfc3442beb5a9635f22b19c97bbfc (patch) | |
| tree | 5f360c0ebd399419a05270529c2906c5dcfff9e9 /drivers/spi/spi-rspi.c | |
| parent | spi: rspi: Use devm_kasprintf() (diff) | |
| download | linux-a30b95a7d81cfc3442beb5a9635f22b19c97bbfc.tar.xz linux-a30b95a7d81cfc3442beb5a9635f22b19c97bbfc.zip | |
spi: rspi: Configure DMA slave bus width to 8 bit
The new Renesas R-Car Gen2 DMA Controller driver (rcar-dmac) requires
explicit configuration of the DMA slave bus width.
Hardcode the DMA transfer size to 1 byte for both directions, as that's
the only supported configuration (16-bit DMA support was removed in
commit 9c5de2c1754c2bb3c69c4d7bf0d0edc0a61d8232 ("spi: rspi: Remove
unused 16-bit DMA support")).
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'drivers/spi/spi-rspi.c')
| -rw-r--r-- | drivers/spi/spi-rspi.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c index aa1c6a893570..6a4eb2d7f644 100644 --- a/drivers/spi/spi-rspi.c +++ b/drivers/spi/spi-rspi.c @@ -919,10 +919,13 @@ static struct dma_chan *rspi_request_dma_chan(struct device *dev, memset(&cfg, 0, sizeof(cfg)); cfg.slave_id = id; cfg.direction = dir; - if (dir == DMA_MEM_TO_DEV) + if (dir == DMA_MEM_TO_DEV) { cfg.dst_addr = port_addr; - else + cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE; + } else { cfg.src_addr = port_addr; + cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE; + } ret = dmaengine_slave_config(chan, &cfg); if (ret) { |