Unverified Commit 1c9f1750 authored by Masahisa Kojima's avatar Masahisa Kojima Committed by Mark Brown
Browse files

spi: spi-synquacer: fix set_cs handling 



When the slave chip select is deasserted, DMSTOP bit
must be set.

Fixes: b0823ee3 ("spi: Add spi driver for Socionext SynQuacer platform")
Signed-off-by: default avatarMasahisa Kojima <masahisa.kojima@linaro.org>
Signed-off-by: default avatarJassi Brar <jaswinder.singh@linaro.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20210201073109.9036-1-jassisinghbrar@gmail.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 9d2aa6db

drivers/spi/spi-synquacer.c

+4 −0
Original line number Diff line number Diff line
@@ -490,6 +490,10 @@ static void synquacer_spi_set_cs(struct spi_device *spi, bool enable) 
	val &= ~(SYNQUACER_HSSPI_DMPSEL_CS_MASK <<

		 SYNQUACER_HSSPI_DMPSEL_CS_SHIFT);

	val |= spi->chip_select << SYNQUACER_HSSPI_DMPSEL_CS_SHIFT;



	if (!enable)

		val |= SYNQUACER_HSSPI_DMSTOP_STOP;



	writel(val, sspi->regs + SYNQUACER_HSSPI_REG_DMSTART);

}