spi: nxp-xspi: Improve AHB read performance with DMA

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Use eDMA for XSPI AHB read to improve the performance.

Read with CPU
root@imx943evk:~# dd if=/dev/mtd0 of=/dev/null bs=32M count=1
1+0 records in
1+0 records out
33554432 bytes (34 MB, 32 MiB) copied, 0.479719 s, 69.9 MB/s

Read with DMA
root@imx943evk:~# dd if=/dev/mtd0 of=/dev/null bs=32M count=1
1+0 records in
1+0 records out
33554432 bytes (34 MB, 32 MiB) copied, 0.115788 s, 290 MB/s

Signed-off-by: Han Xu <han.xu@nxp.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20260722-xspi_dma_upstream-v3-2-6b7ff50cae8e@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>

...

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Han Xu 2026-07-22 17:00:43 -05:00 • committed by Mark Brown

parent 6f99efb115

commit 38d11bb2cd

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drivers/spi/spi-nxp-xspi.c

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