Messages in this thread Patch in this message | | | From | Sergey Suloev <> | Subject | [PATCH v2 2/6] spi: sun6i: handle chip select polarity flag | Date | Fri, 30 Mar 2018 15:50:43 +0300 |
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The chip select polarity flag is declared as supported but is not handled in the code.
Signed-off-by: Sergey Suloev <ssuloev@orpaltech.com>
--- drivers/spi/spi-sun6i.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/drivers/spi/spi-sun6i.c b/drivers/spi/spi-sun6i.c index 88ad45e..78acc1f 100644 --- a/drivers/spi/spi-sun6i.c +++ b/drivers/spi/spi-sun6i.c @@ -193,6 +193,12 @@ static void sun6i_spi_set_cs(struct spi_device *spi, bool enable) else reg &= ~SUN6I_TFR_CTL_CS_LEVEL; + /* Handle chip select "reverse" polarity */ + if (spi->mode & SPI_CS_HIGH) + reg &= ~SUN6I_TFR_CTL_SPOL; + else + reg |= SUN6I_TFR_CTL_SPOL; + /* We want to control the chip select manually */ reg |= SUN6I_TFR_CTL_CS_MANUAL; -- 2.16.2
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