openwrtv4/target/linux/ar71xx/patches-3.8/003-spi-ath79-remove-superfluous-chip-select-code.patch
Gabor Juhos 0ad50b0bec ar71xx: use backported SPI patches
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

SVN-Revision: 35873
2013-03-04 09:40:44 +00:00

33 lines
1,012 B
Diff

From 622d87da7f99b29dde053881bf42c46de7572ce5 Mon Sep 17 00:00:00 2001
From: Gabor Juhos <juhosg@openwrt.org>
Date: Thu, 27 Dec 2012 10:42:26 +0100
Subject: [PATCH] spi/ath79: remove superfluous chip select code
commit f1e8fc9898fd8ca78b7438d3c2e60028d3ae2a34 upstream.
The spi_bitbang driver calls the chipselect function
of the driver from spi_bitbang_setup in order to
deselect the given SPI chip, so we don't have to
initialize the CS line here.
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
---
drivers/spi/spi-ath79.c | 6 ------
1 file changed, 6 deletions(-)
--- a/drivers/spi/spi-ath79.c
+++ b/drivers/spi/spi-ath79.c
@@ -128,12 +128,6 @@ static int ath79_spi_setup_cs(struct spi
gpio_free(cdata->gpio);
return status;
}
- } else {
- if (spi->mode & SPI_CS_HIGH)
- sp->ioc_base |= AR71XX_SPI_IOC_CS0;
- else
- sp->ioc_base &= ~AR71XX_SPI_IOC_CS0;
- ath79_spi_wr(sp, AR71XX_SPI_REG_IOC, sp->ioc_base);
}
return 0;