diff --git a/board/samsung/arndale/arndale.c b/board/samsung/arndale/arndale.c
index e39795d..881d080 100644
--- a/board/samsung/arndale/arndale.c
+++ b/board/samsung/arndale/arndale.c
@@ -19,6 +19,8 @@
 	/* Configure gpios for usb 3503 hub:
 	 * disconnect, toggle reset and connect
 	 */
+	gpio_request(EXYNOS5_GPIO_D17, "usb_connect");
+	gpio_request(EXYNOS5_GPIO_X35, "usb_reset");
 	gpio_direction_output(EXYNOS5_GPIO_D17, 0);
 	gpio_direction_output(EXYNOS5_GPIO_X35, 0);
 
diff --git a/board/samsung/common/misc.c b/board/samsung/common/misc.c
index b935922..4538ac7 100644
--- a/board/samsung/common/misc.c
+++ b/board/samsung/common/misc.c
@@ -411,6 +411,8 @@
 void keys_init(void)
 {
 	/* Set direction to input */
+	gpio_request(KEY_VOL_UP_GPIO, "volume-up");
+	gpio_request(KEY_VOL_DOWN_GPIO, "volume-down");
 	gpio_direction_input(KEY_VOL_UP_GPIO);
 	gpio_direction_input(KEY_VOL_DOWN_GPIO);
 }
diff --git a/board/samsung/goni/goni.c b/board/samsung/goni/goni.c
index 4cee78b..58cf96e 100644
--- a/board/samsung/goni/goni.c
+++ b/board/samsung/goni/goni.c
@@ -90,6 +90,7 @@
 	int i, ret, ret_sd = 0;
 
 	/* MASSMEMORY_EN: XMSMDATA7: GPJ2[7] output high */
+	gpio_request(S5PC110_GPIO_J27, "massmemory_en");
 	gpio_direction_output(S5PC110_GPIO_J27, 1);
 
 	/*
@@ -118,6 +119,7 @@
 	 * SD card (T_FLASH) detect and init
 	 * T_FLASH_DETECT: EINT28: GPH3[4] input mode
 	 */
+	gpio_request(S5PC110_GPIO_H34, "t_flash_detect");
 	gpio_cfg_pin(S5PC110_GPIO_H34, S5P_GPIO_INPUT);
 	gpio_set_pull(S5PC110_GPIO_H34, S5P_GPIO_PULL_UP);
 
diff --git a/board/samsung/smdk5250/exynos5-dt.c b/board/samsung/smdk5250/exynos5-dt.c
index d6ce133..53ff706 100644
--- a/board/samsung/smdk5250/exynos5-dt.c
+++ b/board/samsung/smdk5250/exynos5-dt.c
@@ -29,6 +29,7 @@
 static void board_enable_audio_codec(void)
 {
 	/* Enable MAX98095 Codec */
+	gpio_request(EXYNOS5_GPIO_X17, "max98095_enable");
 	gpio_direction_output(EXYNOS5_GPIO_X17, 1);
 	gpio_set_pull(EXYNOS5_GPIO_X17, S5P_GPIO_PULL_NONE);
 }
@@ -199,16 +200,19 @@
 	/* Setup the GPIOs */
 
 	/* PD is ACTIVE_LOW, and initially de-asserted */
+	gpio_request(EXYNOS5_GPIO_Y25, "dp_bridge_pd");
 	gpio_set_pull(EXYNOS5_GPIO_Y25, S5P_GPIO_PULL_NONE);
 	gpio_direction_output(EXYNOS5_GPIO_Y25, 1);
 
 	/* Reset is ACTIVE_LOW */
+	gpio_request(EXYNOS5_GPIO_X15, "dp_bridge_reset");
 	gpio_set_pull(EXYNOS5_GPIO_X15, S5P_GPIO_PULL_NONE);
 	gpio_direction_output(EXYNOS5_GPIO_X15, 0);
 
 	udelay(10);
 	gpio_set_value(EXYNOS5_GPIO_X15, 1);
 
+	gpio_request(EXYNOS5_GPIO_X07, "dp_bridge_hpd");
 	gpio_direction_input(EXYNOS5_GPIO_X07);
 
 	/*
@@ -236,10 +240,12 @@
 void exynos_cfg_lcd_gpio(void)
 {
 	/* For Backlight */
+	gpio_request(EXYNOS5_GPIO_B20, "lcd_backlight");
 	gpio_cfg_pin(EXYNOS5_GPIO_B20, S5P_GPIO_OUTPUT);
 	gpio_set_value(EXYNOS5_GPIO_B20, 1);
 
 	/* LCD power on */
+	gpio_request(EXYNOS5_GPIO_X15, "lcd_power");
 	gpio_cfg_pin(EXYNOS5_GPIO_X15, S5P_GPIO_OUTPUT);
 	gpio_set_value(EXYNOS5_GPIO_X15, 1);
 
@@ -276,6 +282,7 @@
 	mdelay(10);
 
 	/* board_dp_backlight_en */
+	gpio_request(EXYNOS5_GPIO_X30, "board_dp_backlight_en");
 	gpio_direction_output(EXYNOS5_GPIO_X30, 1);
 #endif
 }
diff --git a/board/samsung/smdk5420/smdk5420.c b/board/samsung/smdk5420/smdk5420.c
index 47998ab..a691222 100644
--- a/board/samsung/smdk5420/smdk5420.c
+++ b/board/samsung/smdk5420/smdk5420.c
@@ -74,9 +74,12 @@
 	mdelay(5);
 
 	/* TODO(ajaykumar.rs@samsung.com): Use device tree */
+	gpio_request(EXYNOS5420_GPIO_X35, "edp_slp#");
 	gpio_direction_output(EXYNOS5420_GPIO_X35, 1);	/* EDP_SLP# */
 	mdelay(10);
+	gpio_request(EXYNOS5420_GPIO_Y77, "edp_rst#");
 	gpio_direction_output(EXYNOS5420_GPIO_Y77, 1);	/* EDP_RST# */
+	gpio_request(EXYNOS5420_GPIO_X26, "edp_hpd");
 	gpio_direction_input(EXYNOS5420_GPIO_X26);	/* EDP_HPD */
 	gpio_set_pull(EXYNOS5420_GPIO_X26, S5P_GPIO_PULL_NONE);
 
@@ -88,6 +91,7 @@
 void exynos_backlight_on(unsigned int onoff)
 {
 	/* For PWM */
+	gpio_request(EXYNOS5420_GPIO_B20, "backlight_on");
 	gpio_cfg_pin(EXYNOS5420_GPIO_B20, S5P_GPIO_FUNC(0x1));
 	gpio_set_value(EXYNOS5420_GPIO_B20, 1);
 
diff --git a/board/samsung/trats/trats.c b/board/samsung/trats/trats.c
index 9e76b5d..e163e45 100644
--- a/board/samsung/trats/trats.c
+++ b/board/samsung/trats/trats.c
@@ -63,6 +63,8 @@
 	}
 
 	/* I2C_8 -> FG */
+	gpio_request(EXYNOS4_GPIO_Y40, "i2c_clk");
+	gpio_request(EXYNOS4_GPIO_Y41, "i2c_data");
 	gpio_direction_output(EXYNOS4_GPIO_Y40, 1);
 	gpio_direction_output(EXYNOS4_GPIO_Y41, 1);
 }
@@ -346,12 +348,17 @@
 static unsigned int get_hw_revision(void)
 {
 	int hwrev = 0;
+	char str[10];
 	int i;
 
 	/* hw_rev[3:0] == GPE1[3:0] */
-	for (i = EXYNOS4_GPIO_E10; i < EXYNOS4_GPIO_E14; i++) {
-		gpio_cfg_pin(i, S5P_GPIO_INPUT);
-		gpio_set_pull(i, S5P_GPIO_PULL_NONE);
+	for (i = 0; i < 4; i++) {
+		int pin = i + EXYNOS4_GPIO_E10;
+
+		sprintf(str, "hw_rev%d", i);
+		gpio_request(pin, str);
+		gpio_cfg_pin(pin, S5P_GPIO_INPUT);
+		gpio_set_pull(pin, S5P_GPIO_PULL_NONE);
 	}
 
 	udelay(1);
@@ -517,6 +524,7 @@
 static void exynos_uart_init(void)
 {
 	/* UART_SEL GPY4[7] (part2) at EXYNOS4 */
+	gpio_request(EXYNOS4_GPIO_Y47, "uart_sel");
 	gpio_set_pull(EXYNOS4_GPIO_Y47, S5P_GPIO_PULL_UP);
 	gpio_direction_output(EXYNOS4_GPIO_Y47, 1);
 }
@@ -534,6 +542,7 @@
 
 void exynos_reset_lcd(void)
 {
+	gpio_request(EXYNOS4_GPIO_Y45, "lcd_reset");
 	gpio_direction_output(EXYNOS4_GPIO_Y45, 1);
 	udelay(10000);
 	gpio_direction_output(EXYNOS4_GPIO_Y45, 0);
diff --git a/board/samsung/trats2/trats2.c b/board/samsung/trats2/trats2.c
index 2924ee6..a737749 100644
--- a/board/samsung/trats2/trats2.c
+++ b/board/samsung/trats2/trats2.c
@@ -33,6 +33,7 @@
 static void check_hw_revision(void)
 {
 	int modelrev = 0;
+	char str[12];
 	int i;
 
 	/*
@@ -41,13 +42,22 @@
 	 * TRM say that it may cause unexcepted state and leakage current.
 	 * and pull-none is only for output function.
 	 */
-	for (i = EXYNOS4X12_GPIO_M10; i < EXYNOS4X12_GPIO_M12; i++)
-		gpio_cfg_pin(i, S5P_GPIO_INPUT);
+	for (i = 0; i < 2; i++) {
+		int pin = i + EXYNOS4X12_GPIO_M10;
+
+		sprintf(str, "model_rev%d", i);
+		gpio_request(pin, str);
+		gpio_cfg_pin(pin, S5P_GPIO_INPUT);
+	}
 
 	/* GPM1[5:2]: HW_REV[3:0] */
-	for (i = EXYNOS4X12_GPIO_M12; i < EXYNOS4X12_GPIO_M16; i++) {
-		gpio_cfg_pin(i, S5P_GPIO_INPUT);
-		gpio_set_pull(i, S5P_GPIO_PULL_NONE);
+	for (i = 0; i < 4; i++) {
+		int pin = i + EXYNOS4X12_GPIO_M12;
+
+		sprintf(str, "hw_rev%d", i);
+		gpio_request(pin, str);
+		gpio_cfg_pin(pin, S5P_GPIO_INPUT);
+		gpio_set_pull(pin, S5P_GPIO_PULL_NONE);
 	}
 
 	/* GPM1[1:0]: MODEL_REV[1:0] */
@@ -103,10 +113,14 @@
 	}
 
 	/* I2C_8 */
+	gpio_request(EXYNOS4X12_GPIO_F14, "i2c8_clk");
+	gpio_request(EXYNOS4X12_GPIO_F15, "i2c8_data");
 	gpio_direction_output(EXYNOS4X12_GPIO_F14, 1);
 	gpio_direction_output(EXYNOS4X12_GPIO_F15, 1);
 
 	/* I2C_9 */
+	gpio_request(EXYNOS4X12_GPIO_M21, "i2c9_clk");
+	gpio_request(EXYNOS4X12_GPIO_M20, "i2c9_data");
 	gpio_direction_output(EXYNOS4X12_GPIO_M21, 1);
 	gpio_direction_output(EXYNOS4X12_GPIO_M20, 1);
 }
@@ -388,6 +402,7 @@
 	struct pmic *p = pmic_get("MAX77686_PMIC");
 
 	/* LCD_2.2V_EN: GPC0[1] */
+	gpio_request(EXYNOS4X12_GPIO_C01, "lcd_2v2_en");
 	gpio_set_pull(EXYNOS4X12_GPIO_C01, S5P_GPIO_PULL_UP);
 	gpio_direction_output(EXYNOS4X12_GPIO_C01, 1);
 
@@ -400,6 +415,7 @@
 void exynos_reset_lcd(void)
 {
 	/* reset lcd */
+	gpio_request(EXYNOS4X12_GPIO_F21, "lcd_reset");
 	gpio_direction_output(EXYNOS4X12_GPIO_F21, 0);
 	udelay(10);
 	gpio_set_value(EXYNOS4X12_GPIO_F21, 1);
diff --git a/board/samsung/universal_c210/universal.c b/board/samsung/universal_c210/universal.c
index f9d3325..c04f48c 100644
--- a/board/samsung/universal_c210/universal.c
+++ b/board/samsung/universal_c210/universal.c
@@ -330,6 +330,7 @@
 	}
 
 	/* gpio pad configuration for LCD reset. */
+	gpio_request(EXYNOS4_GPIO_Y45, "lcd_reset");
 	gpio_cfg_pin(EXYNOS4_GPIO_Y45, S5P_GPIO_OUTPUT);
 
 	spi_init();
@@ -386,6 +387,7 @@
 		 * you should set it HIGH since it removes the inverter
 		 */
 		/* MASSMEMORY_EN: XMDMDATA_6: GPE3[6] */
+		gpio_request(EXYNOS4_GPIO_E36, "ldo_en");
 		gpio_direction_output(EXYNOS4_GPIO_E36, 0);
 		break;
 	default:
@@ -394,6 +396,7 @@
 		 * But set it as HIGH to ensure
 		 */
 		/* MASSMEMORY_EN: XMDMADDR_3: GPE1[3] */
+		gpio_request(EXYNOS4_GPIO_E13, "massmemory_en");
 		gpio_direction_output(EXYNOS4_GPIO_E13, 1);
 		break;
 	}