target/linux/ar71xx/patches-3.8/004-spi-ath79-use-gpio_request_one.patch

   1 From f0b166c931c9971f2ae9614881565d23f58b3178 Mon Sep 17 00:00:00 2001
   2 From: Gabor Juhos <juhosg@openwrt.org>
   3 Date: Thu, 27 Dec 2012 10:42:27 +0100
   4 Subject: [PATCH] spi/ath79: use gpio_request_one
   5
   6 commit 95d79419feffb326a3d5cb50e2248129dec06bb0 upstream.
   7
   8 Use gpio_request_one() instead of multiple gpiolib calls.
   9
  10 Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
  11 Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
  12 ---
  13  drivers/spi/spi-ath79.c |   22 +++++++++++-----------
  14  1 file changed, 11 insertions(+), 11 deletions(-)
  15
  16 --- a/drivers/spi/spi-ath79.c
  17 +++ b/drivers/spi/spi-ath79.c
  18 @@ -100,6 +100,7 @@ static int ath79_spi_setup_cs(struct spi
  19  {
  20         struct ath79_spi *sp = ath79_spidev_to_sp(spi);
  21         struct ath79_spi_controller_data *cdata;
  22 +       int status;
  23
  24         cdata = spi->controller_data;
  25         if (spi->chip_select && !cdata)
  26 @@ -115,22 +116,21 @@ static int ath79_spi_setup_cs(struct spi
  27         /* TODO: setup speed? */
  28         ath79_spi_wr(sp, AR71XX_SPI_REG_CTRL, 0x43);
  29
  30 +       status = 0;
  31         if (spi->chip_select) {
  32 -               int status = 0;
  33 +               unsigned long flags;
  34
  35 -               status = gpio_request(cdata->gpio, dev_name(&spi->dev));
  36 -               if (status)
  37 -                       return status;
  38 -
  39 -               status = gpio_direction_output(cdata->gpio,
  40 -                                              spi->mode & SPI_CS_HIGH);
  41 -               if (status) {
  42 -                       gpio_free(cdata->gpio);
  43 -                       return status;
  44 -               }
  45 +               flags = GPIOF_DIR_OUT;
  46 +               if (spi->mode & SPI_CS_HIGH)
  47 +                       flags |= GPIOF_INIT_HIGH;
  48 +               else
  49 +                       flags |= GPIOF_INIT_LOW;
  50 +
  51 +               status = gpio_request_one(cdata->gpio, flags,
  52 +                                         dev_name(&spi->dev));
  53         }
  54
  55 -       return 0;
  56 +       return status;
  57  }
  58
  59  static void ath79_spi_cleanup_cs(struct spi_device *spi)