diff --git a/include/linux/sm501-regs.h b/include/linux/sm501-regs.h
index 64236b7..d53642d 100644
--- a/include/linux/sm501-regs.h
+++ b/include/linux/sm501-regs.h
@@ -129,11 +129,14 @@
 
 #define SM501_DEVICEID_SM501		(0x05010000)
 #define SM501_DEVICEID_IDMASK		(0xffff0000)
+#define SM501_DEVICEID_REVMASK		(0x000000ff)
 
 #define SM501_PLLCLOCK_COUNT		(0x000064)
 #define SM501_MISC_TIMING		(0x000068)
 #define SM501_CURRENT_SDRAM_CLOCK	(0x00006C)
 
+#define SM501_PROGRAMMABLE_PLL_CONTROL	(0x000074)
+
 /* GPIO base */
 #define SM501_GPIO			(0x010000)
 #define SM501_GPIO_DATA_LOW		(0x00)