diff --git a/arch/arm/dts/tegra124-nyan-big.dts b/arch/arm/dts/tegra124-nyan-big.dts
index 9367193a24777c6b00497cf65cbe27dc4a6c154a..a50f26c69c357c19bbf54def487ae2b2a2194632 100644
--- a/arch/arm/dts/tegra124-nyan-big.dts
+++ b/arch/arm/dts/tegra124-nyan-big.dts
@@ -310,6 +310,10 @@
 		};
 	};
 
+	gpio@6000d000 {
+		u-boot,dm-pre-reloc;
+	};
+
 	gpio-keys {
 		compatible = "gpio-keys";
 
diff --git a/board/nvidia/nyan-big/nyan-big.c b/board/nvidia/nyan-big/nyan-big.c
index d4d2496639b7f050f54b240d178b4bd92147b8de..ae8874bbd25e2f76dee0af909f00b004ef18104e 100644
--- a/board/nvidia/nyan-big/nyan-big.c
+++ b/board/nvidia/nyan-big/nyan-big.c
@@ -6,8 +6,11 @@
  */
 
 #include <common.h>
-#include <asm/arch/gpio.h>
+#include <errno.h>
+#include <asm/gpio.h>
 #include <asm/arch/pinmux.h>
+#include <power/as3722.h>
+#include <power/pmic.h>
 #include "pinmux-config-nyan-big.h"
 
 /*
@@ -25,3 +28,32 @@ void pinmux_init(void)
 	pinmux_config_drvgrp_table(nyan_big_drvgrps,
 				   ARRAY_SIZE(nyan_big_drvgrps));
 }
+
+int tegra_board_id(void)
+{
+	static const int vector[] = {GPIO_PQ3, GPIO_PT1, GPIO_PX1,
+					GPIO_PX4, -1};
+
+	gpio_claim_vector(vector, "board_id%d");
+	return gpio_get_values_as_int(vector);
+}
+
+int tegra_lcd_pmic_init(int board_id)
+{
+	struct udevice *pmic;
+	int ret;
+
+	ret = as3722_get(&pmic);
+	if (ret)
+		return -ENOENT;
+
+	if (board_id == 0)
+		as3722_write(pmic, 0x00, 0x3c);
+	else
+		as3722_write(pmic, 0x00, 0x50);
+	as3722_write(pmic, 0x12, 0x10);
+	as3722_write(pmic, 0x0c, 0x07);
+	as3722_write(pmic, 0x20, 0x10);
+
+	return 0;
+}