spi: imx: add lpspi bus driver

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This patch adds lpspi driver to support new i.MX products which use
lpspi instead of ecspi.

The lpspi can continue operating in stop mode when an appropriate
clock is available. It is also designed for low CPU overhead with
DMA offloading of FIFO register accesses.

Signed-off-by: Gao Pan <pandy.gao@nxp.com>
Reviewed-by: Fugang Duan <B38611@freescale.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

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Gao Pan 2016-11-22 21:52:17 +08:00 • committed by Mark Brown

parent 1001354ca3

commit 5314987de5

3 changed files with 519 additions and 0 deletions

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6

drivers/spi/Kconfig

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1

drivers/spi/Makefile

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512

drivers/spi/spi-fsl-lpspi.c

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