spi: dw: round up result of calculation for clock divider
Avoid ending up with a higher frequency than requested Signed-off-by: NMatthias Seidel <kernel@mseidel.net> Signed-off-by: NMark Brown <broonie@kernel.org>
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Avoid ending up with a higher frequency than requested Signed-off-by: NMatthias Seidel <kernel@mseidel.net> Signed-off-by: NMark Brown <broonie@kernel.org>