[PATCH v2 2/6] spi: sun6i: handle chip select polarity flag
From: Sergey Suloev <hidden>
Date: 2018-03-30 12:51:04
Also in:
linux-spi, lkml
Subsystem:
spi subsystem, the rest · Maintainers:
Mark Brown, Linus Torvalds
The chip select polarity flag is declared as supported but is not handled in the code. Signed-off-by: Sergey Suloev <redacted> --- 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