arm: rmobile: Add cpu_eth_init function

This supports ethernet driver of RMOBILE R8A7740.

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>

arch/arm/cpu/armv7/rmobile/Makefile

@@ -27,6 +27,7 @@ LIB	= $(obj)lib$(SOC).o
 
 SOBJS = lowlevel_init.o
 COBJS-y += cpu_info.o
+COBJS-y += emac.o
 
 COBJS-$(CONFIG_DISPLAY_BOARDINFO) += board.o
 COBJS-$(CONFIG_GLOBAL_TIMER) += timer.o

arch/arm/cpu/armv7/rmobile/emac.c

@@ -0,0 +1,36 @@
+/*
+ * RMOBILE EtherMAC initialization.
+ *
+ * Copyright (C) 2012  Renesas Solutions Corp.
+ * Copyright (C) 2012  Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc.
+ */
+
+#include <common.h>
+#include <asm/errno.h>
+#include <netdev.h>
+
+int cpu_eth_init(bd_t *bis)
+{
+	int ret = -ENODEV;
+#ifdef CONFIG_SH_ETHER
+	ret = sh_eth_initialize(bis);
+#endif
+	return ret;
+}