37 lines
1.2 KiB
Diff
37 lines
1.2 KiB
Diff
From 3a7853f0dd24e81dc920c98a5c7e8cfdde81bb45 Mon Sep 17 00:00:00 2001
|
|
From: Gabor Juhos <juhosg@openwrt.org>
|
|
Date: Thu, 16 Jan 2014 16:58:58 +0100
|
|
Subject: [PATCH] spi-ath79: fix initial GPIO CS line setup
|
|
|
|
The 'ath79_spi_setup_cs' function initializes the chip
|
|
select line of a given SPI device in order to make sure
|
|
that the device is inactive.
|
|
|
|
If the SPI_CS_HIGH bit is set for a given device, it
|
|
means that the CS line of that device is active HIGH
|
|
so it must be set to LOW initially. In case of GPIO
|
|
CS lines, the 'ath79_spi_setup_cs' function does the
|
|
opposite of that due to the wrong GPIO flags.
|
|
|
|
Fix the code to use the correct GPIO flags.
|
|
|
|
Reported-by: Ronald Wahl <ronald.wahl@raritan.com>
|
|
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
|
|
---
|
|
drivers/spi/spi-ath79.c | 4 ++--
|
|
1 file changed, 2 insertions(+), 2 deletions(-)
|
|
|
|
--- a/drivers/spi/spi-ath79.c
|
|
+++ b/drivers/spi/spi-ath79.c
|
|
@@ -132,9 +132,9 @@ static int ath79_spi_setup_cs(struct spi
|
|
|
|
flags = GPIOF_DIR_OUT;
|
|
if (spi->mode & SPI_CS_HIGH)
|
|
- flags |= GPIOF_INIT_HIGH;
|
|
- else
|
|
flags |= GPIOF_INIT_LOW;
|
|
+ else
|
|
+ flags |= GPIOF_INIT_HIGH;
|
|
|
|
status = gpio_request_one(cdata->gpio, flags,
|
|
dev_name(&spi->dev));
|