brcm47xx: add function to get a gpio pin by name

bcm47xx_nvram_gpio_pin() returns a gpio pin number for a given name based
on configuration data in nvram.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

SVN-Revision: 37644

target/linux/brcm47xx/patches-3.10/180-bcm47xx-nvram-gpio.patch

@@ -0,0 +1,35 @@
+--- a/arch/mips/bcm47xx/nvram.c
++++ b/arch/mips/bcm47xx/nvram.c
+@@ -190,3 +190,23 @@ int bcm47xx_nvram_getenv(char *name, cha
+ 	return -ENOENT;
+ }
+ EXPORT_SYMBOL(bcm47xx_nvram_getenv);
++
++int bcm47xx_nvram_gpio_pin(const char *name)
++{
++	int i, err;
++	char nvram_var[10];
++	char buf[30];
++
++	for (i = 0; i < 16; i++) {
++		err = snprintf(nvram_var, sizeof(nvram_var), "gpio%i", i);
++		if (err <= 0)
++			continue;
++		err = bcm47xx_nvram_getenv(nvram_var, buf, sizeof(buf));
++		if (err <= 0)
++			continue;
++		if (!strcmp(name, buf))
++			return i;
++	}
++	return -ENOENT;
++}
++EXPORT_SYMBOL(bcm47xx_nvram_gpio_pin);
+--- a/arch/mips/include/asm/mach-bcm47xx/bcm47xx_nvram.h
++++ b/arch/mips/include/asm/mach-bcm47xx/bcm47xx_nvram.h
+@@ -48,4 +48,6 @@ static inline void bcm47xx_nvram_parse_m
+ 		printk(KERN_WARNING "Can not parse mac address: %s\n", buf);
+ }
+ 
++int bcm47xx_nvram_gpio_pin(const char *name);
++
+ #endif /* __BCM47XX_NVRAM_H */

target/linux/brcm47xx/patches-3.10/400-arch-bcm47xx.patch

@@ -1,9 +1,9 @@
 --- a/arch/mips/bcm47xx/nvram.c
 +++ b/arch/mips/bcm47xx/nvram.c
-@@ -190,3 +190,30 @@ int bcm47xx_nvram_getenv(char *name, cha
+@@ -210,3 +210,30 @@ int bcm47xx_nvram_gpio_pin(const char *n
  	return -ENOENT;
  }
- EXPORT_SYMBOL(bcm47xx_nvram_getenv);
+ EXPORT_SYMBOL(bcm47xx_nvram_gpio_pin);
 +
 +char *nvram_get(const char *name)
 +{

target/linux/brcm47xx/patches-3.10/820-wgt634u-nvram-fix.patch

@@ -294,7 +294,7 @@ out the configuration than the in kernel cfe config reader.
  	/* Look for name=value and return value */
  	var = &nvram_buf[sizeof(struct nvram_header)];
  	end = nvram_buf + sizeof(nvram_buf) - 2;
-@@ -201,6 +230,9 @@ char *nvram_get(const char *name)
+@@ -221,6 +250,9 @@ char *nvram_get(const char *name)
  	if (!nvram_buf[0])
  		nvram_init();