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(parent: 7928b2c) | patch
spi: atmel: init FIFOs before spi enable
authorEugen Hristev <eugen.hristev@microchip.com>
Tue, 27 Feb 2018 10:25:07 +0000 (12:25 +0200)
committerMark Brown <broonie@kernel.org>
Tue, 27 Feb 2018 14:00:45 +0000 (14:00 +0000)
commit9581329eff9db72ab4fbb46a594fd7fdda3c51b0
treeaaba81e368d15814f9541364a96fa65792ba211btree | snapshot
parent7928b2cbe55b2a410a0f5c1f154610059c57b1b2commit | diff
spi: atmel: init FIFOs before spi enable

The datasheet recommends initializing FIFOs before
SPI enable. If we do not do it like this, there may be
a strange behavior. We noticed that DMA does not work properly
with FIFOs if we do not clear them beforehand or enable them
before SPIEN.

Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
drivers/spi/spi-atmel.c diff | blob | history
Linux Kernel tree with some unpolished code for Colibri/Apalis modules