MIPS: BCM47xx: Use sscanf for parsing mac address

Instead of writing own function for parsing the mac address we now
use sscanf.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
To: linux-mips@linux-mips.org
Cc: Hauke Mehrtens <hauke@hauke-m.de>
Patchwork: https://patchwork.linux-mips.org/patch/1847/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

2 files changed, 10 insertions, 20 deletions

diff --git a/arch/mips/bcm47xx/setup.c b/arch/mips/bcm47xx/setup.c
index 1f61dfd71ac7..87a305536604 100644
--- a/arch/mips/bcm47xx/setup.c
+++ b/arch/mips/bcm47xx/setup.c
@@ -56,23 +56,6 @@ static void bcm47xx_machine_halt(void)
                 cpu_relax();
 }
 
-static void str2eaddr(char *str, char *dest)
-{
-        int i = 0;
-
-        if (str == NULL) {
-                memset(dest, 0, 6);
-                return;
-        }
-
-        for (;;) {
-                dest[i++] = (char) simple_strtoul(str, NULL, 16);
-                str += 2;
-                if (!*str++ || i == 6)
-                        break;
-        }
-}
-
 #define READ_FROM_NVRAM(_outvar, name, buf) \
         if (nvram_getenv(name, buf, sizeof(buf)) >= 0)\
                 sprom->_outvar = simple_strtoul(buf, NULL, 0);
@@ -87,11 +70,11 @@ static void bcm47xx_fill_sprom(struct ssb_sprom *sprom)
         sprom->revision = 1; /* Fallback: Old hardware does not define this. */
         READ_FROM_NVRAM(revision, "sromrev", buf);
         if (nvram_getenv("il0macaddr", buf, sizeof(buf)) >= 0)
-                str2eaddr(buf, sprom->il0mac);
+                nvram_parse_macaddr(buf, sprom->il0mac);
         if (nvram_getenv("et0macaddr", buf, sizeof(buf)) >= 0)
-                str2eaddr(buf, sprom->et0mac);
+                nvram_parse_macaddr(buf, sprom->et0mac);
         if (nvram_getenv("et1macaddr", buf, sizeof(buf)) >= 0)
-                str2eaddr(buf, sprom->et1mac);
+                nvram_parse_macaddr(buf, sprom->et1mac);
         READ_FROM_NVRAM(et0phyaddr, "et0phyaddr", buf);
         READ_FROM_NVRAM(et1phyaddr, "et1phyaddr", buf);
         READ_FROM_NVRAM(et0mdcport, "et0mdcport", buf);
diff --git a/arch/mips/include/asm/mach-bcm47xx/nvram.h b/arch/mips/include/asm/mach-bcm47xx/nvram.h
index c58ebd8bc155..9759588ba3cf 100644
--- a/arch/mips/include/asm/mach-bcm47xx/nvram.h
+++ b/arch/mips/include/asm/mach-bcm47xx/nvram.h
@@ -12,6 +12,7 @@
 #define __NVRAM_H
 
 #include <linux/types.h>
+#include <linux/kernel.h>
 
 struct nvram_header {
         u32 magic;
@@ -36,4 +37,10 @@ struct nvram_header {
 
 extern int nvram_getenv(char *name, char *val, size_t val_len);
 
+static inline void nvram_parse_macaddr(char *buf, u8 *macaddr)
+{
+        sscanf(buf, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", &macaddr[0], &macaddr[1],
+               &macaddr[2], &macaddr[3], &macaddr[4], &macaddr[5]);
+}
+
 #endif