diff --git a/board/renesas/alt/Kconfig b/board/renesas/alt/Kconfig
index 957962de20e03d15360db04c633221fbf80e7891..39d53c185b2616c865c8505a57ded448a33c7dab 100644
--- a/board/renesas/alt/Kconfig
+++ b/board/renesas/alt/Kconfig
@@ -9,4 +9,13 @@ config SYS_VENDOR
 config SYS_CONFIG_NAME
 	default "alt"
 
+config R8A7794_ETHERNET_B
+	bool "Use ethernet B function"
+	depends on TARGET_ALT
+	default n
+	help
+	  ALT board can use default ethernet and etnernet B function.
+	  This config set pin function of ethenet B. You also needt to change
+	  DIP switch of board in order to use this function.
+
 endif
diff --git a/board/renesas/alt/alt.c b/board/renesas/alt/alt.c
index f0010db814a83aced0566223a88147076c7ac6b1..3501a170442c2c2ef2ee3356cd44399fdf21463c 100644
--- a/board/renesas/alt/alt.c
+++ b/board/renesas/alt/alt.c
@@ -1,7 +1,7 @@
 /*
  * board/renesas/alt/alt.c
  *
- * Copyright (C) 2014 Renesas Electronics Corporation
+ * Copyright (C) 2014, 2015 Renesas Electronics Corporation
  *
  * SPDX-License-Identifier: GPL-2.0
  */
@@ -94,6 +94,20 @@ int board_init(void)
 	r8a7794_pinmux_init();
 
 	/* Ether Enable */
+#if defined(CONFIG_R8A7794_ETHERNET_B)
+	gpio_request(GPIO_FN_ETH_CRS_DV_B, NULL);
+	gpio_request(GPIO_FN_ETH_RX_ER_B, NULL);
+	gpio_request(GPIO_FN_ETH_RXD0_B, NULL);
+	gpio_request(GPIO_FN_ETH_RXD1_B, NULL);
+	gpio_request(GPIO_FN_ETH_LINK_B, NULL);
+	gpio_request(GPIO_FN_ETH_REFCLK_B, NULL);
+	gpio_request(GPIO_FN_ETH_MDIO_B, NULL);
+	gpio_request(GPIO_FN_ETH_TXD1_B, NULL);
+	gpio_request(GPIO_FN_ETH_TX_EN_B, NULL);
+	gpio_request(GPIO_FN_ETH_MAGIC_B, NULL);
+	gpio_request(GPIO_FN_ETH_TXD0_B, NULL);
+	gpio_request(GPIO_FN_ETH_MDC_B, NULL);
+#else
 	gpio_request(GPIO_FN_ETH_CRS_DV, NULL);
 	gpio_request(GPIO_FN_ETH_RX_ER, NULL);
 	gpio_request(GPIO_FN_ETH_RXD0, NULL);
@@ -106,6 +120,7 @@ int board_init(void)
 	gpio_request(GPIO_FN_ETH_MAGIC, NULL);
 	gpio_request(GPIO_FN_ETH_TXD0, NULL);
 	gpio_request(GPIO_FN_ETH_MDC, NULL);
+#endif
 	gpio_request(GPIO_FN_IRQ8, NULL);
 
 	/* PHY reset */