target/linux/ar71xx/patches-3.8/003-spi-ath79-remove-superfluous-chip-select-code.patch

   1 From 622d87da7f99b29dde053881bf42c46de7572ce5 Mon Sep 17 00:00:00 2001
   2 From: Gabor Juhos <juhosg@openwrt.org>
   3 Date: Thu, 27 Dec 2012 10:42:26 +0100
   4 Subject: [PATCH] spi/ath79: remove superfluous chip select code
   5
   6 commit f1e8fc9898fd8ca78b7438d3c2e60028d3ae2a34 upstream.
   7
   8 The spi_bitbang driver calls the chipselect function
   9 of the driver from spi_bitbang_setup in order to
  10 deselect the given SPI chip, so we don't have to
  11 initialize the CS line here.
  12
  13 Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
  14 Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
  15 ---
  16  drivers/spi/spi-ath79.c |    6 ------
  17  1 file changed, 6 deletions(-)
  18
  19 --- a/drivers/spi/spi-ath79.c
  20 +++ b/drivers/spi/spi-ath79.c
  21 @@ -128,12 +128,6 @@ static int ath79_spi_setup_cs(struct spi
  22                         gpio_free(cdata->gpio);
  23                         return status;
  24                 }
  25 -       } else {
  26 -               if (spi->mode & SPI_CS_HIGH)
  27 -                       sp->ioc_base |= AR71XX_SPI_IOC_CS0;
  28 -               else
  29 -                       sp->ioc_base &= ~AR71XX_SPI_IOC_CS0;
  30 -               ath79_spi_wr(sp, AR71XX_SPI_REG_IOC, sp->ioc_base);
  31         }
  32
  33         return 0;