diff options
| author | Peng Ma <peng.ma@nxp.com> | 2019-12-12 03:38:10 +0000 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2019-12-18 11:55:46 +0530 |
| commit | ed5a0ab41555032a944c18bd5f8eb275c740f856 (patch) | |
| tree | a89e82cb8a3432e68ee189d342db95e30bf74dd2 /drivers/dma/fsl-edma-common.c | |
| parent | d8c1bdb5288da433e1dc486f5e847e24a48d632b (diff) | |
dmaengine: fsl-edma: Add eDMA support for QorIQ LS1028A platform
Our platforms(such as LS1021A, LS1012A, LS1043A, LS1046A, LS1028A) with
below registers(CHCFG0 - CHCFG15) of eDMA as follows:
*-----------------------------------------------------------*
| Offset | OTHERS | LS1028A |
|--------------|--------------------|-----------------------|
| 0x0 | CHCFG0 | CHCFG3 |
|--------------|--------------------|-----------------------|
| 0x1 | CHCFG1 | CHCFG2 |
|--------------|--------------------|-----------------------|
| 0x2 | CHCFG2 | CHCFG1 |
|--------------|--------------------|-----------------------|
| 0x3 | CHCFG3 | CHCFG0 |
|--------------|--------------------|-----------------------|
| ... | ...... | ...... |
|--------------|--------------------|-----------------------|
| 0xC | CHCFG12 | CHCFG15 |
|--------------|--------------------|-----------------------|
| 0xD | CHCFG13 | CHCFG14 |
|--------------|--------------------|-----------------------|
| 0xE | CHCFG14 | CHCFG13 |
|--------------|--------------------|-----------------------|
| 0xF | CHCFG15 | CHCFG12 |
*-----------------------------------------------------------*
This patch is to improve edma driver to fit LS1028A platform.
Signed-off-by: Peng Ma <peng.ma@nxp.com>
Reviewed-by: Robin Gong <yibin.gong@nxp.com>
Link: https://lore.kernel.org/r/20191212033714.4090-1-peng.ma@nxp.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma/fsl-edma-common.c')
| -rw-r--r-- | drivers/dma/fsl-edma-common.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/dma/fsl-edma-common.c b/drivers/dma/fsl-edma-common.c index b1a7ca91701a..5697c3622699 100644 --- a/drivers/dma/fsl-edma-common.c +++ b/drivers/dma/fsl-edma-common.c @@ -109,10 +109,15 @@ void fsl_edma_chan_mux(struct fsl_edma_chan *fsl_chan, u32 ch = fsl_chan->vchan.chan.chan_id; void __iomem *muxaddr; unsigned int chans_per_mux, ch_off; + int endian_diff[4] = {3, 1, -1, -3}; u32 dmamux_nr = fsl_chan->edma->drvdata->dmamuxs; chans_per_mux = fsl_chan->edma->n_chans / dmamux_nr; ch_off = fsl_chan->vchan.chan.chan_id % chans_per_mux; + + if (fsl_chan->edma->drvdata->mux_swap) + ch_off += endian_diff[ch_off % 4]; + muxaddr = fsl_chan->edma->muxbase[ch / chans_per_mux]; slot = EDMAMUX_CHCFG_SOURCE(slot); |