spi: atmel: init FIFOs before spi enable

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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

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Eugen Hristev 2018-02-27 12:25:07 +02:00 • committed by Mark Brown

parent 7928b2cbe5

commit 9581329eff

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drivers/spi/spi-atmel.c

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