| commit | 2dd33f9cec90499029fd49ffae2922c3f9ccad11 | |
| author | Martin Kaiser <martin@kaiser.cx> | |
| Wed, 19 Oct 2016 22:42:25 +0000 (20 00:42 +0200) | ||
| committer | Mark Brown <broonie@kernel.org> | |
| Mon, 24 Oct 2016 17:04:23 +0000 (24 18:04 +0100) | ||
| tree | 235bb1f6341311eb8954bfd5b55165c27e6e56bf | treesnapshot (tar.gz zip) |
| parent | 1001354ca34179f3db924eb66672442a173147dc | commitdiff |
spi: imx: support DMA for imx35
Support DMA transfers on imx35 and compatible chipsets (imx31, imx25).
If DMA can be used, set the start mode control (SMC) bit to start the
SPI burst as soon as data is written into the tx fifo. Configure DMA
requests when the fifo is half empty during tx or half full during rx.
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Signed-off-by: Mark Brown <broonie@kernel.org>
Support DMA transfers on imx35 and compatible chipsets (imx31, imx25).
If DMA can be used, set the start mode control (SMC) bit to start the
SPI burst as soon as data is written into the tx fifo. Configure DMA
requests when the fifo is half empty during tx or half full during rx.
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Signed-off-by: Mark Brown <broonie@kernel.org>
| drivers/spi/spi-imx.c | diffblobblamehistory |