spi: Add DMA support for spi_flash_read()

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Few SPI devices provide accelerated read interfaces to read from
SPI-NOR flash devices. These hardwares also support DMA to transfer data
from flash to memory either via mem-to-mem DMA or dedicated slave DMA
channels. Hence, add support for DMA in order to improve throughput and
reduce CPU load.
Use spi_map_buf() to get sg table for the buffer and pass it to SPI
driver.

Signed-off-by: Vignesh R <vigneshr@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

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Vignesh R 2016-06-08 12:18:31 +05:30 • committed by Mark Brown

parent 1a695a905c

commit f4502dd1da

2 changed files with 32 additions and 0 deletions

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28

drivers/spi/spi.c

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4

include/linux/spi/spi.h

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