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| author | Zachary Zhang <zhangzg@marvell.com> | 2017-09-13 18:21:39 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2017-09-13 18:37:49 +0200 |
| commit | 6fd6fd68c9e2f3a206a098ef57b1d5548f9d00d1 (patch) | |
| tree | a20e91cefa04a6c9bf78ac5027958fca23c5b6ae /drivers/spi/spi-zynqmp-gqspi.c | |
| parent | spi: armada-3700: Fix failing commands with quad-SPI (diff) | |
| download | linux-6fd6fd68c9e2f3a206a098ef57b1d5548f9d00d1.tar.xz linux-6fd6fd68c9e2f3a206a098ef57b1d5548f9d00d1.zip | |
spi: armada-3700: Fix padding when sending not 4-byte aligned data
In 4-byte transfer mode, extra padding/dummy bytes '0xff' would be
sent in write operation if TX data is not 4-byte aligned since the
SPI data register is always shifted out as whole 4 bytes.
Fix this by using the header count feature that allows to transfer 0 to
4 bytes. Use it to actually send the first 1 to 3 bytes of data before
the rest of the buffer that will hence be 4-byte aligned.
Signed-off-by: Zachary Zhang <zhangzg@marvell.com>
Signed-off-by: Miquel Raynal <miquel.raynal@free-electrons.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions