diff options
| author | Guennadi Liakhovetski <g.liakhovetski@gmx.de> | 2013-06-24 14:36:34 +0200 |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2013-08-25 06:10:15 +0200 |
| commit | acd6d772a04989eb836e98f005155793f51efc7d (patch) | |
| tree | 8711be5fccf3f017bfdc570655f9fe9fd17126d3 /drivers/mmc/host/sh_mmcif.c | |
| parent | mmc: sh_mmcif: move header include from header into .c (diff) | |
| download | linux-acd6d772a04989eb836e98f005155793f51efc7d.tar.xz linux-acd6d772a04989eb836e98f005155793f51efc7d.zip | |
mmc: sh_mmcif: add support for Device Tree DMA bindings
To use DMA in the Device Tree case the driver has to be modified
to use suitable API to obtain DMA channels.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc/host/sh_mmcif.c')
| -rw-r--r-- | drivers/mmc/host/sh_mmcif.c | 26 |
1 files changed, 16 insertions, 10 deletions
diff --git a/drivers/mmc/host/sh_mmcif.c b/drivers/mmc/host/sh_mmcif.c index 2596664246c1..2acfa41d609f 100644 --- a/drivers/mmc/host/sh_mmcif.c +++ b/drivers/mmc/host/sh_mmcif.c @@ -387,25 +387,29 @@ static void sh_mmcif_request_dma(struct sh_mmcif_host *host, host->dma_active = false; - if (!pdata) - return; - - if (pdata->slave_id_tx <= 0 || pdata->slave_id_rx <= 0) + if (pdata) { + if (pdata->slave_id_tx <= 0 || pdata->slave_id_rx <= 0) + return; + } else if (!host->pd->dev.of_node) { return; + } /* We can only either use DMA for both Tx and Rx or not use it at all */ dma_cap_zero(mask); dma_cap_set(DMA_SLAVE, mask); - host->chan_tx = dma_request_channel(mask, shdma_chan_filter, - (void *)pdata->slave_id_tx); + host->chan_tx = dma_request_slave_channel_compat(mask, shdma_chan_filter, + pdata ? (void *)pdata->slave_id_tx : NULL, + &host->pd->dev, "tx"); dev_dbg(&host->pd->dev, "%s: TX: got channel %p\n", __func__, host->chan_tx); if (!host->chan_tx) return; - cfg.slave_id = pdata->slave_id_tx; + /* In the OF case the driver will get the slave ID from the DT */ + if (pdata) + cfg.slave_id = pdata->slave_id_tx; cfg.direction = DMA_MEM_TO_DEV; cfg.dst_addr = res->start + MMCIF_CE_DATA; cfg.src_addr = 0; @@ -413,15 +417,17 @@ static void sh_mmcif_request_dma(struct sh_mmcif_host *host, if (ret < 0) goto ecfgtx; - host->chan_rx = dma_request_channel(mask, shdma_chan_filter, - (void *)pdata->slave_id_rx); + host->chan_rx = dma_request_slave_channel_compat(mask, shdma_chan_filter, + pdata ? (void *)pdata->slave_id_rx : NULL, + &host->pd->dev, "rx"); dev_dbg(&host->pd->dev, "%s: RX: got channel %p\n", __func__, host->chan_rx); if (!host->chan_rx) goto erqrx; - cfg.slave_id = pdata->slave_id_rx; + if (pdata) + cfg.slave_id = pdata->slave_id_rx; cfg.direction = DMA_DEV_TO_MEM; cfg.dst_addr = 0; cfg.src_addr = res->start + MMCIF_CE_DATA; |