[Blackfin] arch: grab mac address from OTP on BF527-EZKIT

The bf527-ezkit stores the mac address in OTP,
so grab it from there rather than flash

Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>

diff --git a/arch/blackfin/mach-bf527/boards/ezkit.c b/arch/blackfin/mach-bf527/boards/ezkit.c
index 770056b..ab7a21f 100644 (file)
--- a/arch/blackfin/mach-bf527/boards/ezkit.c
+++ b/arch/blackfin/mach-bf527/boards/ezkit.c
@@ -936,13 +936,18 @@ void native_machine_restart(char *cmd)
                bfin_gpio_reset_spi0_ssel1();
 }
 
-/*
- * Currently the MAC address is saved in Flash by U-Boot
- */
-#define FLASH_MAC      0x203f0000
 void bfin_get_ether_addr(char *addr)
 {
-       *(u32 *)(&(addr[0])) = bfin_read32(FLASH_MAC);
-       *(u16 *)(&(addr[4])) = bfin_read16(FLASH_MAC + 4);
+       /* the MAC is stored in OTP memory page 0xDF */
+       u32 ret;
+       u64 otp_mac;
+       u32 (*otp_read)(u32 page, u32 flags, u64 *page_content) = (void *)0xEF00001A;
+
+       ret = otp_read(0xDF, 0x00, &otp_mac);
+       if (!(ret & 0x1)) {
+               char *otp_mac_p = (char *)&otp_mac;
+               for (ret = 0; ret < 6; ++ret)
+                       addr[ret] = otp_mac_p[5 - ret];
+       }
 }
 EXPORT_SYMBOL(bfin_get_ether_addr);