xilinx: Move zynq_board_read_rom_ethaddr to shared location

Zynq and ZynqMP are sharing similar code and there is no reason to do
code duplication. Move zynq_board_read_rom_ethaddr() to common file for
easier conversion to DM.
Use ZynqMP version that's why also add CONFIG_ZYNQ_EEPROM_BUS to Syzygy
which is only one Zynq board which is using this feature.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>

board/opalkelly/zynq/board.c

@@ -1 +1,3 @@
+#include "../../xilinx/common/board.c"
+
 #include "../../xilinx/zynq/board.c"

board/xilinx/common/board.c

@@ -0,0 +1,25 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2014 - 2019 Xilinx, Inc.
+ * Michal Simek <michal.simek@xilinx.com>
+ */
+
+#include <common.h>
+#include <dm/uclass.h>
+#include <i2c.h>
+
+int zynq_board_read_rom_ethaddr(unsigned char *ethaddr)
+{
+#if defined(CONFIG_ZYNQ_GEM_EEPROM_ADDR) && \
+    defined(CONFIG_ZYNQ_GEM_I2C_MAC_OFFSET) && \
+    defined(CONFIG_ZYNQ_EEPROM_BUS)
+	i2c_set_bus_num(CONFIG_ZYNQ_EEPROM_BUS);
+
+	if (eeprom_read(CONFIG_ZYNQ_GEM_EEPROM_ADDR,
+			CONFIG_ZYNQ_GEM_I2C_MAC_OFFSET,
+			ethaddr, 6))
+		printf("I2C EEPROM MAC address read failed\n");
+#endif
+
+	return 0;
+}

board/xilinx/zynq/Makefile

@@ -4,6 +4,7 @@
 # Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 
 obj-y	:= board.o
+obj-y	+= ../common/board.o
 
 ifneq ($(CONFIG_XILINX_PS_INIT_FILE),"")
 PS_INIT_FILE := $(shell cd $(srctree); readlink -f $(CONFIG_XILINX_PS_INIT_FILE))

board/xilinx/zynq/board.c

@@ -77,19 +77,6 @@ int board_late_init(void)
 	return 0;
 }
 
-int zynq_board_read_rom_ethaddr(unsigned char *ethaddr)
-{
-#if defined(CONFIG_ZYNQ_GEM_EEPROM_ADDR) && \
-    defined(CONFIG_ZYNQ_GEM_I2C_MAC_OFFSET)
-	if (eeprom_read(CONFIG_ZYNQ_GEM_EEPROM_ADDR,
-			CONFIG_ZYNQ_GEM_I2C_MAC_OFFSET,
-			ethaddr, 6))
-		printf("I2C EEPROM MAC address read failed\n");
-#endif
-
-	return 0;
-}
-
 #if !defined(CONFIG_SYS_SDRAM_BASE) && !defined(CONFIG_SYS_SDRAM_SIZE)
 int dram_init_banksize(void)
 {

board/xilinx/zynqmp/Makefile

@@ -4,6 +4,7 @@
 # Michal Simek <michal.simek@xilinx.com>
 
 obj-y	:= zynqmp.o
+obj-y	+= ../common/board.o
 
 ifneq ($(CONFIG_XILINX_PS_INIT_FILE),"")
 PS_INIT_FILE := $(shell cd $(srctree); readlink -f $(CONFIG_XILINX_PS_INIT_FILE))

board/xilinx/zynqmp/zynqmp.c

@@ -20,7 +20,6 @@
 #include <usb.h>
 #include <dwc3-uboot.h>
 #include <zynqmppl.h>
-#include <i2c.h>
 #include <g_dnl.h>
 
 DECLARE_GLOBAL_DATA_PTR;
@@ -409,22 +408,6 @@ int board_early_init_r(void)
 	return 0;
 }
 
-int zynq_board_read_rom_ethaddr(unsigned char *ethaddr)
-{
-#if defined(CONFIG_ZYNQ_GEM_EEPROM_ADDR) && \
-    defined(CONFIG_ZYNQ_GEM_I2C_MAC_OFFSET) && \
-    defined(CONFIG_ZYNQ_EEPROM_BUS)
-	i2c_set_bus_num(CONFIG_ZYNQ_EEPROM_BUS);
-
-	if (eeprom_read(CONFIG_ZYNQ_GEM_EEPROM_ADDR,
-			CONFIG_ZYNQ_GEM_I2C_MAC_OFFSET,
-			ethaddr, 6))
-		printf("I2C EEPROM MAC address read failed\n");
-#endif
-
-	return 0;
-}
-
 unsigned long do_go_exec(ulong (*entry)(int, char * const []), int argc,
 			 char * const argv[])
 {

include/configs/syzygy_hub.h

@@ -12,6 +12,7 @@
 
 #define CONFIG_SYS_I2C_EEPROM_ADDR_LEN 1
 #define CONFIG_ZYNQ_GEM_EEPROM_ADDR    0x57
+#define CONFIG_ZYNQ_EEPROM_BUS		0
 
 #define CONFIG_EXTRA_ENV_SETTINGS       \
 	"fit_image=fit.itb\0"		\