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| author | Masahisa Kojima <masahisa.kojima@linaro.org> | 2021-02-01 01:31:09 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-03-04 10:26:51 +0100 |
| commit | c5abc17d27407444617d9863cee6308c51668261 (patch) | |
| tree | d975fe72909aa5692a0ee89029fa4eadea32d046 | |
| parent | 3dbe8f1d24de5b553c4606ace78ae0a98e6aac55 (diff) | |
| download | linux-stable-c5abc17d27407444617d9863cee6308c51668261.tar.gz linux-stable-c5abc17d27407444617d9863cee6308c51668261.tar.bz2 linux-stable-c5abc17d27407444617d9863cee6308c51668261.zip | |
spi: spi-synquacer: fix set_cs handling
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>
| -rw-r--r-- | drivers/spi/spi-synquacer.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/spi/spi-synquacer.c b/drivers/spi/spi-synquacer.c index 5ab5119e2f1b..785e7c445123 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); } |