From: Stephen Boyd swboyd@chromium.org
[ Upstream commit 74639cbf51d7c0304342544a83dfda354a6bd208 ]
There isn't any need to overwrite the mode here in the driver with what has been detected by the firmware, such as DT or ACPI. In fact, if we use the SPI CS gpio descriptor feature we will overwrite the mode with SPI_MODE_0 where it already contains SPI_MODE_0 and more importantly SPI_CS_HIGH. Clearing the SPI_CS_HIGH bit causes the CS line to toggle when the device is probed when it shouldn't change, confusing the driver and making it fail to probe. Drop the assignment and let the spi core take care of it.
Fixes: a17d94f0b6e1 ("mfd: Add ChromeOS EC SPI driver") Cc: Simon Glass sjg@chromium.org Cc: Gwendal Grignou gwendal@chromium.org Reviewed-by: Douglas Anderson dianders@chromium.org Tested-by: Douglas Anderson dianders@chromium.org Acked-by: Enric Balletbo i Serra enric.balletbo@collabora.com Cc: Alexandru M Stan amstan@chromium.org Signed-off-by: Stephen Boyd swboyd@chromium.org Reviewed-by: Simon Glass sjg@chromium.org Link: https://lore.kernel.org/r/20201204193540.3047030-2-swboyd@chromium.org Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/platform/chrome/cros_ec_spi.c | 1 - 1 file changed, 1 deletion(-)
diff --git a/drivers/platform/chrome/cros_ec_spi.c b/drivers/platform/chrome/cros_ec_spi.c index dfa1f816a45f4..f9df218fc2bbe 100644 --- a/drivers/platform/chrome/cros_ec_spi.c +++ b/drivers/platform/chrome/cros_ec_spi.c @@ -742,7 +742,6 @@ static int cros_ec_spi_probe(struct spi_device *spi) int err;
spi->bits_per_word = 8; - spi->mode = SPI_MODE_0; spi->rt = true; err = spi_setup(spi); if (err < 0)