From: Masahisa Kojima masahisa.kojima@linaro.org
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 --- drivers/spi/spi-synquacer.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/spi/spi-synquacer.c b/drivers/spi/spi-synquacer.c index 42e82dbe3d41..a3344f1cc8ff 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); }