From: Masahisa Kojima Date: Mon, 1 Feb 2021 07:31:09 +0000 (-0600) Subject: spi: spi-synquacer: fix set_cs handling X-Git-Tag: v5.12-rc1~116^2~1^2~4 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=1c9f1750f0305bf605ff22686fc0ac89c06deb28;p=thirdparty%2Fkernel%2Flinux.git 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 --- diff --git a/drivers/spi/spi-synquacer.c b/drivers/spi/spi-synquacer.c index 8cdca6ab80989..ea706d9629cb1 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); }