lkml.org 
[lkml]   [2015]   [Mar]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[RFC PATCH] spi: Ensure that CS line is in non-active state after setup
Date
When drivers didn't provide setup() method, SPI core should ensure
that CS line is driven in non-active state after spi_setup().

Signed-off-by: Ivan T. Ivanov <iivanov@mm-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..bfba2d9 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -1895,6 +1895,8 @@ int spi_setup(struct spi_device *spi)

if (spi->master->setup)
status = spi->master->setup(spi);
+ else
+ spi_set_cs(spi, false);

dev_dbg(&spi->dev, "setup mode %d, %s%s%s%s%u bits/w, %u Hz max --> %d\n",
(int) (spi->mode & (SPI_CPOL | SPI_CPHA)),
--
1.9.1


\
 
 \ /
  Last update: 2015-03-06 17:01    [W:0.101 / U:0.168 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site