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spi: Correct operations check in dm_spi_xfer()

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At present we have to have an xfer() method even if it does nothing. This
is not correct, so fix it.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass
2019-12-06 21:42:35 -07:00
committed by Bin Meng
parent 86c70e9ca6
commit ccdabd8956
3 changed files with 6 additions and 10 deletions
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2
include/spi.h
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@@ -224,7 +224,7 @@ void spi_release_bus(struct spi_slave *slave);
int spi_set_wordlen(struct spi_slave *slave, unsigned int wordlen);
/**
* SPI transfer
* SPI transfer (optional if mem_ops is used)
*
* This writes "bitlen" bits out the SPI MOSI port and simultaneously clocks
* "bitlen" bits in the SPI MISO port. That's just the way SPI works.