spi: lpspi: add the error info of transfer speed setting

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Add a error info when set a speed which greater than half of per-clk of
spi module.

The minimum SCK period is 2 cycles(CCR[SCKDIV]). So the maximum transfer
speed is half of spi per-clk.

Signed-off-by: Clark Wang <xiaoning.wang@nxp.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

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Clark Wang 2019-03-06 06:30:41 +00:00 • committed by Mark Brown

parent 944c01a889

commit 77736a98b8

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1 changed files with 13 additions and 3 deletions

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drivers/spi/spi-fsl-lpspi.c

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