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Date: Fri, 13 Mar 2015 18:43:49 +0200 From: "Ivan T. Ivanov" <iivanov@...sol.com> To: Mark Brown <broonie@...nel.org> Cc: linux-spi@...r.kernel.org, linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org Subject: [PATCH v2] spi: Ensure that CS line is in non-active state after spi_setup() Some devices samples state of the chip select signal during power up and act differently based on this state, so SPI core should ensure that CS line is driven in non-active state after spi_setup(). Signed-off-by: Ivan T. Ivanov <iivanov@...sol.com> --- drivers/spi/spi.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index c64a3e5..4023cc9 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -1893,6 +1893,8 @@ int spi_setup(struct spi_device *spi) if (!spi->max_speed_hz) spi->max_speed_hz = spi->master->max_speed_hz; + spi_set_cs(spi, false); + if (spi->master->setup) status = spi->master->setup(spi); -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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