54 lines
1.5 KiB
Diff
54 lines
1.5 KiB
Diff
commit e49ec29e2da1fd7cdd6d966f389add031a1027a9
|
|
Author: Hauke Mehrtens <hauke@hauke-m.de>
|
|
Date: Wed Sep 18 13:31:15 2013 +0200
|
|
|
|
MIPS: BCM47XX: Get GPIO pin from nvram configuration
|
|
|
|
The nvram contains some gpio configuration for boards. It is stored in
|
|
a gpio<number>=name format e.g.
|
|
gpio8=wps_button
|
|
gpio4=robo_reset
|
|
|
|
This patches adds a function to parse these entries, so other driver
|
|
can use it.
|
|
|
|
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
|
|
Cc: linux-mips@linux-mips.org
|
|
Patchwork: https://patchwork.linux-mips.org/patch/5841/
|
|
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
|
|
|
|
--- 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 */
|