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| author | Maxime Chevallier <maxime.chevallier@smile.fr> | 2018-01-17 19:15:25 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2018-01-18 13:59:12 +0300 |
| commit | 44a5f423e70374e5b42cecd85e78f2d79334e0f2 (patch) | |
| tree | ac17c518f5357f051350af2833675af9cb913182 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | 4fbd8d194f06c8a3fd2af1ce560ddb31f7ec8323 (diff) | |
| download | linux-44a5f423e70374e5b42cecd85e78f2d79334e0f2.tar.xz | |
spi: a3700: Clear DATA_OUT when performing a read
When performing a read using FIFO mode, the spi controller shifts out
the last 2 bytes that were written in a previous transfer on MOSI.
This undocumented behaviour can cause devices to misinterpret the
transfer, so we explicitly clear the WFIFO before each read.
This behaviour was noticed on EspressoBin.
Signed-off-by: Maxime Chevallier <maxime.chevallier@smile.fr>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions