diff options
| author | Joy Chakraborty <joychakr@google.com> | 2023-05-12 13:47:44 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2023-05-15 04:46:17 +0300 |
| commit | 020a3947e7f18e790cc72785281755f8c49e11d4 (patch) | |
| tree | 820a48a67b87bc4fa8b434b531568f958ee39d8b /drivers/spi/spi-dw.h | |
| parent | d1ca1c5297ba9260942c0b3f1171a98a432bdfec (diff) | |
| download | linux-020a3947e7f18e790cc72785281755f8c49e11d4.tar.xz | |
spi: dw: Add DMA address widths capability check
Store address width capabilities of DMA controller during init and check
the same per transfer to make sure the bits/word requirement can be met.
Current DW DMA driver requires both tx and rx channel to be configured
and functional hence a subset of both tx and rx channel address width
capability is checked with the width requirement(n_bytes) for a
transfer.
* tested on Baikal-T1 based system with DW SPI-looped back interface
transferring a chunk of data with DFS:8,12,16.
Signed-off-by: Joy Chakraborty <joychakr@google.com
Reviewed-by: Serge Semin <fancer.lancer@gmail.com
Tested-by: Serge Semin <fancer.lancer@gmail.com
Link: https://lore.kernel.org/r/20230512104746.1797865-3-joychakr@google.com
Signed-off-by: Mark Brown <broonie@kernel.org
Diffstat (limited to 'drivers/spi/spi-dw.h')
| -rw-r--r-- | drivers/spi/spi-dw.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/spi/spi-dw.h b/drivers/spi/spi-dw.h index 9e8eb2b52d5c..3962e6dcf880 100644 --- a/drivers/spi/spi-dw.h +++ b/drivers/spi/spi-dw.h @@ -190,6 +190,7 @@ struct dw_spi { struct dma_chan *rxchan; u32 rxburst; u32 dma_sg_burst; + u32 dma_addr_widths; unsigned long dma_chan_busy; dma_addr_t dma_addr; /* phy address of the Data register */ const struct dw_spi_dma_ops *dma_ops; |