MIPS: BCM47XX: Get GPIO pin from nvram configuration (62cf3bc0) · Commits · 戴 / test

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>

arch/mips/bcm47xx/nvram.c

+20 −0

Original line number	Diff line number	Diff line
		@@ -190,3 +190,23 @@ int bcm47xx_nvram_getenv(char name, char val, size_t val_len)
		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);

arch/mips/include/asm/mach-bcm47xx/bcm47xx_nvram.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -48,4 +48,6 @@ static inline void bcm47xx_nvram_parse_macaddr(char *buf, u8 macaddr[6])
		printk(KERN_WARNING "Can not parse mac address: %s\n", buf);
		}

		int bcm47xx_nvram_gpio_pin(const char *name);

		#endif /* __BCM47XX_NVRAM_H */

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