From: Masahisa Kojima <[email protected]>
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 <[email protected]>
Signed-off-by: Jassi Brar <[email protected]>
Cc: [email protected]
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Mark Brown <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
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);
}
