mx6: soc: Add ENET2 mac address support

The i.MX6SX and i.MX6UL has two ENET controllers, add support for reading
MAC address from fuse for ENET2.

Signed-off-by: Ye Li <ye.li@nxp.com>

arch/arm/cpu/armv7/mx6/soc.c

@@ -364,15 +364,29 @@ void imx_get_mac_from_fuse(int dev_id, unsigned char *mac)
 	struct fuse_bank4_regs *fuse =
 			(struct fuse_bank4_regs *)bank->fuse_regs;
 
-	u32 value = readl(&fuse->mac_addr_high);
-	mac[0] = (value >> 8);
-	mac[1] = value ;
+	if ((is_cpu_type(MXC_CPU_MX6SX) || is_cpu_type(MXC_CPU_MX6UL)) && 
+		dev_id == 1) {
+		u32 value = readl(&fuse->mac_addr2);
+		mac[0] = value >> 24 ;
+		mac[1] = value >> 16 ;
+		mac[2] = value >> 8 ;
+		mac[3] = value ;
 
-	value = readl(&fuse->mac_addr_low);
-	mac[2] = value >> 24 ;
-	mac[3] = value >> 16 ;
-	mac[4] = value >> 8 ;
-	mac[5] = value ;
+		value = readl(&fuse->mac_addr1);
+		mac[4] = value >> 24 ;
+		mac[5] = value >> 16 ;
+		
+	} else {
+		u32 value = readl(&fuse->mac_addr1);
+		mac[0] = (value >> 8);
+		mac[1] = value ;
+
+		value = readl(&fuse->mac_addr0);
+		mac[2] = value >> 24 ;
+		mac[3] = value >> 16 ;
+		mac[4] = value >> 8 ;
+		mac[5] = value ;
+	}
 
 }
 #endif

arch/arm/include/asm/arch-mx6/imx-regs.h

@@ -715,39 +715,22 @@ struct fuse_bank1_regs {
 	u32	rsvd7[3];
 };
 
-#if (defined(CONFIG_MX6SX) || defined(CONFIG_MX6UL))
 struct fuse_bank4_regs {
 	u32 sjc_resp_low;
 	u32 rsvd0[3];
 	u32 sjc_resp_high;
 	u32 rsvd1[3];
-	u32 mac_addr_low;
+	u32 mac_addr0;
 	u32 rsvd2[3];
-	u32 mac_addr_high;
+	u32 mac_addr1;
 	u32 rsvd3[3];
-	u32 mac_addr2;
+	u32 mac_addr2; /*For i.MX6SX and i.MX6UL*/
 	u32 rsvd4[7];
 	u32 gp1;
 	u32 rsvd5[3];
 	u32 gp2;
 	u32 rsvd6[3];
 };
-#else
-struct fuse_bank4_regs {
-	u32	sjc_resp_low;
-	u32     rsvd0[3];
-	u32     sjc_resp_high;
-	u32     rsvd1[3];
-	u32	mac_addr_low;
-	u32     rsvd2[3];
-	u32     mac_addr_high;
-	u32	rsvd3[0xb];
-	u32	gp1;
-	u32	rsvd4[3];
-	u32	gp2;
-	u32	rsvd5[3];
-};
-#endif
 
 struct aipstz_regs {
 	u32	mprot0;

doc/README.imx6

@@ -7,7 +7,10 @@ SoC.
 -----------------------------------
 
 1.1 MAC Address: It is stored in fuse bank 4, with the 32 lsbs in word 2 and the
-    16 msbs in word 3.
+    16 msbs in word 3[15:0].
+    For i.MX6SX and i.MX6UL, they have two MAC addresses. The second MAC address
+    is stored in fuse bank 4, with the 16 lsb in word 3[31:16] and the 32 msbs in 
+    word 4.
 
 Example: