lkml.org 
[lkml]   [2018]   [Apr]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v3 2/6] spi: sun6i: handle chip select polarity flag
Date
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
\
 
 \ /
  Last update: 2018-04-03 17:47    [W:0.097 / U:2.996 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site