From: Masahisa Kojima masahisa.kojima@linaro.org
commit 1c9f1750f0305bf605ff22686fc0ac89c06deb28 upstream.
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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/spi/spi-synquacer.c | 4 ++++ 1 file changed, 4 insertions(+)
--- a/drivers/spi/spi-synquacer.c +++ b/drivers/spi/spi-synquacer.c @@ -490,6 +490,10 @@ static void synquacer_spi_set_cs(struct 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); }