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spi: spi-synquacer: fix set_cs handling

Message ID 20210201073109.9036-1-jassisinghbrar@gmail.com (mailing list archive)
State Accepted
Commit 1c9f1750f0305bf605ff22686fc0ac89c06deb28
Headers show
Series spi: spi-synquacer: fix set_cs handling | expand

Commit Message

Jassi Brar Feb. 1, 2021, 7:31 a.m. UTC
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(+)


Mark Brown Feb. 3, 2021, 9:08 p.m. UTC | #1
On Mon, 1 Feb 2021 01:31:09 -0600, jassisinghbrar@gmail.com wrote:
> When the slave chip select is deasserted, DMSTOP bit
> must be set.

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-next


[1/1] spi: spi-synquacer: fix set_cs handling
      commit: 1c9f1750f0305bf605ff22686fc0ac89c06deb28

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
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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 |= spi->chip_select << SYNQUACER_HSSPI_DMPSEL_CS_SHIFT;
+	if (!enable)
 	writel(val, sspi->regs + SYNQUACER_HSSPI_REG_DMSTART);