target/linux/brcm47xx/patches-3.10/085-MIPS-BCM47XX-Get-GPIO-pin-from-nvram-configuration.patch

   1 commit e49ec29e2da1fd7cdd6d966f389add031a1027a9
   2 Author: Hauke Mehrtens <hauke@hauke-m.de>
   3 Date:   Wed Sep 18 13:31:15 2013 +0200
   4
   5     MIPS: BCM47XX: Get GPIO pin from nvram configuration
   6
   7     The nvram contains some gpio configuration for boards. It is stored in
   8     a gpio<number>=name format e.g.
   9     gpio8=wps_button
  10     gpio4=robo_reset
  11
  12     This patches adds a function to parse these entries, so other driver
  13     can use it.
  14
  15     Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
  16     Cc: linux-mips@linux-mips.org
  17     Patchwork: https://patchwork.linux-mips.org/patch/5841/
  18     Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
  19
  20 --- a/arch/mips/bcm47xx/nvram.c
  21 +++ b/arch/mips/bcm47xx/nvram.c
  22 @@ -190,3 +190,23 @@ int bcm47xx_nvram_getenv(char *name, cha
  23         return -ENOENT;
  24  }
  25  EXPORT_SYMBOL(bcm47xx_nvram_getenv);
  26 +
  27 +int bcm47xx_nvram_gpio_pin(const char *name)
  28 +{
  29 +       int i, err;
  30 +       char nvram_var[10];
  31 +       char buf[30];
  32 +
  33 +       for (i = 0; i < 16; i++) {
  34 +               err = snprintf(nvram_var, sizeof(nvram_var), "gpio%i", i);
  35 +               if (err <= 0)
  36 +                       continue;
  37 +               err = bcm47xx_nvram_getenv(nvram_var, buf, sizeof(buf));
  38 +               if (err <= 0)
  39 +                       continue;
  40 +               if (!strcmp(name, buf))
  41 +                       return i;
  42 +       }
  43 +       return -ENOENT;
  44 +}
  45 +EXPORT_SYMBOL(bcm47xx_nvram_gpio_pin);
  46 --- a/arch/mips/include/asm/mach-bcm47xx/bcm47xx_nvram.h
  47 +++ b/arch/mips/include/asm/mach-bcm47xx/bcm47xx_nvram.h
  48 @@ -48,4 +48,6 @@ static inline void bcm47xx_nvram_parse_m
  49                 printk(KERN_WARNING "Can not parse mac address: %s\n", buf);
  50  }
  51
  52 +int bcm47xx_nvram_gpio_pin(const char *name);
  53 +
  54  #endif /* __BCM47XX_NVRAM_H */