diff --git a/arch/arm/include/asm/arch-s5pc1xx/gpio.h b/arch/arm/include/asm/arch-s5pc1xx/gpio.h
index 485b9bf8..903de9c 100644
--- a/arch/arm/include/asm/arch-s5pc1xx/gpio.h
+++ b/arch/arm/include/asm/arch-s5pc1xx/gpio.h
@@ -126,14 +126,14 @@
 };
 
 /* functions */
-void gpio_cfg_pin(struct s5p_gpio_bank *bank, int gpio, int cfg);
-void gpio_direction_output(struct s5p_gpio_bank *bank, int gpio, int en);
-void gpio_direction_input(struct s5p_gpio_bank *bank, int gpio);
-void gpio_set_value(struct s5p_gpio_bank *bank, int gpio, int en);
-unsigned int gpio_get_value(struct s5p_gpio_bank *bank, int gpio);
-void gpio_set_pull(struct s5p_gpio_bank *bank, int gpio, int mode);
-void gpio_set_drv(struct s5p_gpio_bank *bank, int gpio, int mode);
-void gpio_set_rate(struct s5p_gpio_bank *bank, int gpio, int mode);
+void s5p_gpio_cfg_pin(struct s5p_gpio_bank *bank, int gpio, int cfg);
+void s5p_gpio_direction_output(struct s5p_gpio_bank *bank, int gpio, int en);
+void s5p_gpio_direction_input(struct s5p_gpio_bank *bank, int gpio);
+void s5p_gpio_set_value(struct s5p_gpio_bank *bank, int gpio, int en);
+unsigned int s5p_gpio_get_value(struct s5p_gpio_bank *bank, int gpio);
+void s5p_gpio_set_pull(struct s5p_gpio_bank *bank, int gpio, int mode);
+void s5p_gpio_set_drv(struct s5p_gpio_bank *bank, int gpio, int mode);
+void s5p_gpio_set_rate(struct s5p_gpio_bank *bank, int gpio, int mode);
 #endif
 
 /* Pin configurations */
diff --git a/arch/arm/include/asm/arch-s5pc2xx/gpio.h b/arch/arm/include/asm/arch-s5pc2xx/gpio.h
index 38303e4..8db5895 100644
--- a/arch/arm/include/asm/arch-s5pc2xx/gpio.h
+++ b/arch/arm/include/asm/arch-s5pc2xx/gpio.h
@@ -80,14 +80,14 @@
 };
 
 /* functions */
-void gpio_cfg_pin(struct s5p_gpio_bank *bank, int gpio, int cfg);
-void gpio_direction_output(struct s5p_gpio_bank *bank, int gpio, int en);
-void gpio_direction_input(struct s5p_gpio_bank *bank, int gpio);
-void gpio_set_value(struct s5p_gpio_bank *bank, int gpio, int en);
-unsigned int gpio_get_value(struct s5p_gpio_bank *bank, int gpio);
-void gpio_set_pull(struct s5p_gpio_bank *bank, int gpio, int mode);
-void gpio_set_drv(struct s5p_gpio_bank *bank, int gpio, int mode);
-void gpio_set_rate(struct s5p_gpio_bank *bank, int gpio, int mode);
+void s5p_gpio_cfg_pin(struct s5p_gpio_bank *bank, int gpio, int cfg);
+void s5p_gpio_direction_output(struct s5p_gpio_bank *bank, int gpio, int en);
+void s5p_gpio_direction_input(struct s5p_gpio_bank *bank, int gpio);
+void s5p_gpio_set_value(struct s5p_gpio_bank *bank, int gpio, int en);
+unsigned int s5p_gpio_get_value(struct s5p_gpio_bank *bank, int gpio);
+void s5p_gpio_set_pull(struct s5p_gpio_bank *bank, int gpio, int mode);
+void s5p_gpio_set_drv(struct s5p_gpio_bank *bank, int gpio, int mode);
+void s5p_gpio_set_rate(struct s5p_gpio_bank *bank, int gpio, int mode);
 #endif
 
 /* Pin configurations */
diff --git a/board/samsung/goni/goni.c b/board/samsung/goni/goni.c
index 581935d..e24cd29 100644
--- a/board/samsung/goni/goni.c
+++ b/board/samsung/goni/goni.c
@@ -73,7 +73,7 @@
 	int i;
 
 	/* MASSMEMORY_EN: XMSMDATA7: GPJ2[7] output high */
-	gpio_direction_output(&s5pc110_gpio->j2, 7, 1);
+	s5p_gpio_direction_output(&s5pc110_gpio->j2, 7, 1);
 
 	/*
 	 * MMC0 GPIO
@@ -86,11 +86,11 @@
 		if (i == 2)
 			continue;
 		/* GPG0[0:6] special function 2 */
-		gpio_cfg_pin(&s5pc110_gpio->g0, i, 0x2);
+		s5p_gpio_cfg_pin(&s5pc110_gpio->g0, i, 0x2);
 		/* GPG0[0:6] pull disable */
-		gpio_set_pull(&s5pc110_gpio->g0, i, GPIO_PULL_NONE);
+		s5p_gpio_set_pull(&s5pc110_gpio->g0, i, GPIO_PULL_NONE);
 		/* GPG0[0:6] drv 4x */
-		gpio_set_drv(&s5pc110_gpio->g0, i, GPIO_DRV_4X);
+		s5p_gpio_set_drv(&s5pc110_gpio->g0, i, GPIO_DRV_4X);
 	}
 
 	return s5p_mmc_init(0, 4);
diff --git a/board/samsung/smdkc100/smdkc100.c b/board/samsung/smdkc100/smdkc100.c
index 1ad68b9..c41e610 100644
--- a/board/samsung/smdkc100/smdkc100.c
+++ b/board/samsung/smdkc100/smdkc100.c
@@ -41,7 +41,7 @@
 		(struct s5pc100_gpio *)samsung_get_base_gpio();
 
 	/* gpio configuration GPK0CON */
-	gpio_cfg_pin(&gpio->k0, CONFIG_ENV_SROM_BANK, GPIO_FUNC(2));
+	s5p_gpio_cfg_pin(&gpio->k0, CONFIG_ENV_SROM_BANK, GPIO_FUNC(2));
 
 	/* Ethernet needs bus width of 16 bits */
 	smc_bw_conf = SMC_DATA16_WIDTH(CONFIG_ENV_SROM_BANK);
diff --git a/board/samsung/smdkv310/smdkv310.c b/board/samsung/smdkv310/smdkv310.c
index acf9ee7..173520e 100644
--- a/board/samsung/smdkv310/smdkv310.c
+++ b/board/samsung/smdkv310/smdkv310.c
@@ -37,7 +37,7 @@
 	u32 smc_bw_conf, smc_bc_conf;
 
 	/* gpio configuration GPK0CON */
-	gpio_cfg_pin(&gpio2->y0, CONFIG_ENV_SROM_BANK, GPIO_FUNC(2));
+	s5p_gpio_cfg_pin(&gpio2->y0, CONFIG_ENV_SROM_BANK, GPIO_FUNC(2));
 
 	/* Ethernet needs bus width of 16 bits */
 	smc_bw_conf = SROMC_DATA16_WIDTH(CONFIG_ENV_SROM_BANK);
@@ -116,10 +116,10 @@
 	 */
 	for (i = 0; i < 7; i++) {
 		/* GPK2[0:6] special function 2 */
-		gpio_cfg_pin(&gpio2->k2, i, GPIO_FUNC(0x2));
+		s5p_gpio_cfg_pin(&gpio2->k2, i, GPIO_FUNC(0x2));
 
 		/* GPK2[0:6] drv 4x */
-		gpio_set_drv(&gpio2->k2, i, GPIO_DRV_4X);
+		s5p_gpio_set_drv(&gpio2->k2, i, GPIO_DRV_4X);
 
 		/* GPK2[0:1] pull disable */
 		if (i == 0 || i == 1) {
@@ -128,7 +128,7 @@
 		}
 
 		/* GPK2[2:6] pull up */
-		gpio_set_pull(&gpio2->k2, i, GPIO_PULL_UP);
+		s5p_gpio_set_pull(&gpio2->k2, i, GPIO_PULL_UP);
 	}
 	err = s5p_mmc_init(2, 4);
 	return err;
diff --git a/drivers/gpio/s5p_gpio.c b/drivers/gpio/s5p_gpio.c
index a1bcddc..2043859 100644
--- a/drivers/gpio/s5p_gpio.c
+++ b/drivers/gpio/s5p_gpio.c
@@ -36,7 +36,7 @@
 #define RATE_MASK(x)		(0x1 << (x + 16))
 #define RATE_SET(x)		(0x1 << (x + 16))
 
-void gpio_cfg_pin(struct s5p_gpio_bank *bank, int gpio, int cfg)
+void s5p_gpio_cfg_pin(struct s5p_gpio_bank *bank, int gpio, int cfg)
 {
 	unsigned int value;
 
@@ -46,11 +46,11 @@
 	writel(value, &bank->con);
 }
 
-void gpio_direction_output(struct s5p_gpio_bank *bank, int gpio, int en)
+void s5p_gpio_direction_output(struct s5p_gpio_bank *bank, int gpio, int en)
 {
 	unsigned int value;
 
-	gpio_cfg_pin(bank, gpio, GPIO_OUTPUT);
+	s5p_gpio_cfg_pin(bank, gpio, GPIO_OUTPUT);
 
 	value = readl(&bank->dat);
 	value &= ~DAT_MASK(gpio);
@@ -59,12 +59,12 @@
 	writel(value, &bank->dat);
 }
 
-void gpio_direction_input(struct s5p_gpio_bank *bank, int gpio)
+void s5p_gpio_direction_input(struct s5p_gpio_bank *bank, int gpio)
 {
-	gpio_cfg_pin(bank, gpio, GPIO_INPUT);
+	s5p_gpio_cfg_pin(bank, gpio, GPIO_INPUT);
 }
 
-void gpio_set_value(struct s5p_gpio_bank *bank, int gpio, int en)
+void s5p_gpio_set_value(struct s5p_gpio_bank *bank, int gpio, int en)
 {
 	unsigned int value;
 
@@ -75,7 +75,7 @@
 	writel(value, &bank->dat);
 }
 
-unsigned int gpio_get_value(struct s5p_gpio_bank *bank, int gpio)
+unsigned int s5p_gpio_get_value(struct s5p_gpio_bank *bank, int gpio)
 {
 	unsigned int value;
 
@@ -83,7 +83,7 @@
 	return !!(value & DAT_MASK(gpio));
 }
 
-void gpio_set_pull(struct s5p_gpio_bank *bank, int gpio, int mode)
+void s5p_gpio_set_pull(struct s5p_gpio_bank *bank, int gpio, int mode)
 {
 	unsigned int value;
 
@@ -102,7 +102,7 @@
 	writel(value, &bank->pull);
 }
 
-void gpio_set_drv(struct s5p_gpio_bank *bank, int gpio, int mode)
+void s5p_gpio_set_drv(struct s5p_gpio_bank *bank, int gpio, int mode)
 {
 	unsigned int value;
 
@@ -123,7 +123,7 @@
 	writel(value, &bank->drv);
 }
 
-void gpio_set_rate(struct s5p_gpio_bank *bank, int gpio, int mode)
+void s5p_gpio_set_rate(struct s5p_gpio_bank *bank, int gpio, int mode)
 {
 	unsigned int value;