sh: r0p7734: Add support I2C controller

This read MAC address from Serial EEPROM and set.

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

board/renesas/r0p7734/r0p7734.c

@@ -25,6 +25,7 @@
 #include <asm/io.h>
 #include <asm/processor.h>
 #include <netdev.h>
+#include <i2c.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -55,6 +56,24 @@ int board_init(void)
 	if (r & MSTPSR1_GETHER)
 		writel((r & ~MSTPSR1_GETHER), MSTPCR1);
 #endif
+
+	return 0;
+}
+
+int board_late_init(void)
+{
+	u8 mac[6];
+
+	/* Read Mac Address and set*/
+	i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
+	i2c_set_bus_num(CONFIG_SYS_I2C_MODULE);
+
+	/* Read MAC address */
+	i2c_read(0x50, 0x10, 0, mac, 6);
+
+	if (is_valid_ether_addr(mac))
+		eth_setenv_enetaddr("ethaddr", mac);
+
 	return 0;
 }
 
@@ -75,4 +94,3 @@ int board_eth_init(bd_t *bis)
 	return rc;
 }
 #endif
-

include/configs/r0p7734.h

@@ -34,6 +34,7 @@
 #define CONFIG_400MHZ_MODE	1
 /* #define CONFIG_533MHZ_MODE	1 */
 
+#define CONFIG_BOARD_LATE_INIT
 #define CONFIG_SYS_TEXT_BASE 0x8FFC0000
 
 #define CONFIG_CMD_FLASH
@@ -67,6 +68,22 @@
 # define CONFIG_SMC911X_BASE (0x84000000)
 #endif
 
+
+/* I2C */
+#define CONFIG_CMD_I2C
+#define CONFIG_SH_SH7734_I2C	1
+#define CONFIG_HARD_I2C			1
+#define CONFIG_I2C_MULTI_BUS	1
+#define CONFIG_SYS_MAX_I2C_BUS	2
+#define CONFIG_SYS_I2C_MODULE	0
+#define CONFIG_SYS_I2C_SPEED	100000 /* 100 kHz */
+#define CONFIG_SYS_I2C_SLAVE	0x50
+#define CONFIG_SH_I2C_DATA_HIGH	4
+#define CONFIG_SH_I2C_DATA_LOW	5
+#define CONFIG_SH_I2C_CLOCK		500000000
+#define CONFIG_SH_I2C_BASE0		0xFFC70000
+#define CONFIG_SH_I2C_BASE1		0xFFC7100
+
 /* undef to save memory	*/
 #define CONFIG_SYS_LONGHELP
 /* Monitor Command Prompt */