From 1c9f1750f0305bf605ff22686fc0ac89c06deb28 Mon Sep 17 00:00:00 2001 From: Masahisa Kojima Date: Mon, 1 Feb 2021 01:31:09 -0600 Subject: 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 Signed-off-by: Jassi Brar Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20210201073109.9036-1-jassisinghbrar@gmail.com Signed-off-by: Mark Brown --- drivers/spi/spi-synquacer.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers/spi/spi-synquacer.c') 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); } -- cgit v1.2.1