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x86: ich-spi: Clear atomic preop only when SPI settings are not locked

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The atomic preop register can only be written when SPI settings are
not locked, otherwise it's read-only.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Bin Meng 2017-08-26 19:22:59 -07:00
parent 52dd56ba84
commit d2ca80c3d7
1 changed files with 2 additions and 1 deletions
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3
drivers/spi/ich.c
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@ -563,7 +563,8 @@ static int ich_spi_xfer(struct udevice *dev, unsigned int bitlen,
}
/* Clear atomic preop now that xfer is done */
ich_writew(ctlr, 0, ctlr->preop);
if (!lock)
ich_writew(ctlr, 0, ctlr->preop);
return 0;
}