drivers: dma: siwx91x: Fix DMA_ADDR_ADJ_NO_CHANGE w/ memory source
GPDMA does not support DMA_ADDR_ADJ_NO_CHANGE with a memory buffer. This
feature is required for the SPI driver. Hopefully, SPI driver is the only
user of this feature.
Therefore, this commit introduces a hack for SPI. When the user request an
Rx transaction, rather than copying content of mosi_overrun parameter, it
configures the DMA to fill the destination memory (with either 0s or 1s).
Obviously, this only works if mosi_overrun is 0x00 or 0xFF. Hopefully, none
will need any other value.
Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
1 file changed
