diff --git a/arch/arm/dts/exynos4210-trats.dts b/arch/arm/dts/exynos4210-trats.dts
index 36d02df..f3fac80 100644
--- a/arch/arm/dts/exynos4210-trats.dts
+++ b/arch/arm/dts/exynos4210-trats.dts
@@ -117,4 +117,8 @@
 	sdhci@12540000 {
 		status = "disabled";
 	};
+
+	dwmmc@12550000 {
+		status = "disabled";
+	};
 };
diff --git a/arch/arm/mach-exynos/clock.c b/arch/arm/mach-exynos/clock.c
index 1c6baa1..18eadf5 100644
--- a/arch/arm/mach-exynos/clock.c
+++ b/arch/arm/mach-exynos/clock.c
@@ -1661,6 +1661,9 @@
 {
 	enum periph_id id;
 
+	if (cpu_is_exynos4())
+		return exynos4_get_mmc_clk(dev_index);
+
 	switch (dev_index) {
 	case 0:
 		id = PERIPH_ID_SDMMC0;
@@ -1679,12 +1682,7 @@
 		return -1;
 	}
 
-	if (cpu_is_exynos5())
-		return clock_get_periph_rate(id);
-	else if (cpu_is_exynos4())
-		return exynos4_get_mmc_clk(dev_index);
-
-	return 0;
+	return clock_get_periph_rate(id);
 }
 
 void set_mmc_clk(int dev_index, unsigned int div)
diff --git a/drivers/gpio/s5p_gpio.c b/drivers/gpio/s5p_gpio.c
index 17fcfbf..0f22b23 100644
--- a/drivers/gpio/s5p_gpio.c
+++ b/drivers/gpio/s5p_gpio.c
@@ -341,18 +341,22 @@
 		plat = calloc(1, sizeof(*plat));
 		if (!plat)
 			return -ENOMEM;
-		reg = fdtdec_get_addr(blob, node, "reg");
-		if (reg != FDT_ADDR_T_NONE)
-			bank = (struct s5p_gpio_bank *)((ulong)base + reg);
-		plat->bank = bank;
-		plat->bank_name = fdt_get_name(blob, node, NULL);
-		debug("dev at %p: %s\n", bank, plat->bank_name);
 
+		plat->bank_name = fdt_get_name(blob, node, NULL);
 		ret = device_bind(parent, parent->driver,
-					plat->bank_name, plat, -1, &dev);
+				  plat->bank_name, plat, -1, &dev);
 		if (ret)
 			return ret;
+
 		dev->of_offset = node;
+
+		reg = dev_get_addr(dev);
+		if (reg != FDT_ADDR_T_NONE)
+			bank = (struct s5p_gpio_bank *)((ulong)base + reg);
+
+		plat->bank = bank;
+
+		debug("dev at %p: %s\n", bank, plat->bank_name);
 	}
 
 	return 0;
diff --git a/dts/Kconfig b/dts/Kconfig
index 0f4d755..fb2d79e 100644
--- a/dts/Kconfig
+++ b/dts/Kconfig
@@ -37,7 +37,9 @@
 	bool "Embedded DTB for DT control"
 	help
 	  If this option is enabled, the device tree will be picked up and
-	  built into the U-Boot image.
+	  built into the U-Boot image. This is suitable for local debugging
+	  and development only and is not recommended for production devices.
+	  Boards in the mainline U-Boot tree should not use it.
 
 config OF_HOSTFILE
 	bool "Host filed DTB for DT control"
diff --git a/lib/fdtdec.c b/lib/fdtdec.c
index 9f0b65d..1a86369 100644
--- a/lib/fdtdec.c
+++ b/lib/fdtdec.c
@@ -149,7 +149,7 @@
 	}
 
 	ns = fdt_size_cells(blob, parent);
-	if (ns < 1) {
+	if (ns < 0) {
 		debug("(bad #size-cells)\n");
 		return FDT_ADDR_T_NONE;
 	}
@@ -180,10 +180,11 @@
 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node,
 		const char *prop_name, fdt_size_t *sizep)
 {
+	int ns = sizep ? (sizeof(fdt_size_t) / sizeof(fdt32_t)) : 0;
+
 	return fdtdec_get_addr_size_fixed(blob, node, prop_name, 0,
 					  sizeof(fdt_addr_t) / sizeof(fdt32_t),
-					  sizeof(fdt_size_t) / sizeof(fdt32_t),
-					  sizep);
+					  ns, sizep);
 }
 
 fdt_addr_t fdtdec_get_addr(const void *blob, int node,