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brcm47xx: add function to get a gpio pin by name

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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
This commit is contained in:
Hauke Mehrtens 2013-08-01 19:04:12 +00:00
parent 1eabf431df
commit 2363cb3893
3 changed files with 38 additions and 3 deletions
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35
target/linux/brcm47xx/patches-3.10/180-bcm47xx-nvram-gpio.patch Normal file
View file

@ -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 */

4
target/linux/brcm47xx/patches-3.10/400-arch-bcm47xx.patch
View file

@ -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)
+{

2
target/linux/brcm47xx/patches-3.10/820-wgt634u-nvram-fix.patch
View file

@ -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();