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