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authorMasahisa Kojima <masahisa.kojima@linaro.org>2021-02-01 10:31:09 +0300
committerMark Brown <broonie@kernel.org>2021-02-03 19:23:07 +0300
commit1c9f1750f0305bf605ff22686fc0ac89c06deb28 (patch)
treeacc07b7164fe61974839057b857879d349f715dd /drivers/spi/spi-synquacer.c
parent9d2aa6dbf87af89c13cac2d1b4cccad83fb14a7e (diff)
downloadlinux-1c9f1750f0305bf605ff22686fc0ac89c06deb28.tar.xz
spi: spi-synquacer: fix set_cs handling
When the slave chip select is deasserted, DMSTOP bit must be set. Fixes: b0823ee35cf9 ("spi: Add spi driver for Socionext SynQuacer platform") Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org> Signed-off-by: Jassi 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: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi/spi-synquacer.c')
-rw-r--r--drivers/spi/spi-synquacer.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/spi/spi-synquacer.c b/drivers/spi/spi-synquacer.c
index 8cdca6ab8098..ea706d9629cb 100644
--- a/drivers/spi/spi-synquacer.c
+++ b/drivers/spi/spi-synquacer.c
@@ -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);
}