diff --git a/arch/arm/include/asm/arch-lpc32xx/clk.h b/arch/arm/include/asm/arch-lpc32xx/clk.h
index 663f6bc..d21310e 100644
--- a/arch/arm/include/asm/arch-lpc32xx/clk.h
+++ b/arch/arm/include/asm/arch-lpc32xx/clk.h
@@ -167,6 +167,18 @@
 /* SDRAMCLK register bits */
 #define CLK_SDRAM_DDR_SEL		(1 << 1)
 
+/* USB control register definitions */
+#define CLK_USBCTRL_PLL_STS		(1 << 0)
+#define CLK_USBCTRL_FDBK_PLUS1(n)	(((n) & 0xFF) << 1)
+#define CLK_USBCTRL_POSTDIV_2POW(n)	(((n) & 0x3) << 11)
+#define CLK_USBCTRL_PLL_PWRUP		(1 << 16)
+#define CLK_USBCTRL_CLK_EN1		(1 << 17)
+#define CLK_USBCTRL_CLK_EN2		(1 << 18)
+#define CLK_USBCTRL_BUS_KEEPER		(0x1 << 19)
+#define CLK_USBCTRL_USBHSTND_EN		(1 << 21)
+#define CLK_USBCTRL_USBDVND_EN		(1 << 22)
+#define CLK_USBCTRL_HCLK_EN		(1 << 24)
+
 unsigned int get_sys_clk_rate(void);
 unsigned int get_hclk_pll_rate(void);
 unsigned int get_hclk_clk_div(void);
diff --git a/arch/arm/include/asm/arch-lpc32xx/sys_proto.h b/arch/arm/include/asm/arch-lpc32xx/sys_proto.h
index d6e5e68..eb8010f 100644
--- a/arch/arm/include/asm/arch-lpc32xx/sys_proto.h
+++ b/arch/arm/include/asm/arch-lpc32xx/sys_proto.h
@@ -16,6 +16,7 @@
 void lpc32xx_slc_nand_init(void);
 void lpc32xx_i2c_init(unsigned int devnum);
 void lpc32xx_ssp_init(void);
+void lpc32xx_usb_init(void);
 #if defined(CONFIG_SPL_BUILD)
 void ddr_init(const struct emc_dram_settings *dram);
 #endif