SYSC_REG_CHIP_REV   19 arch/mips/include/asm/mach-ralink/mt7620.h #define SYSC_REG_CHIP_REV		0x0c
SYSC_REG_CHIP_REV   17 arch/mips/include/asm/mach-ralink/mt7621.h #define SYSC_REG_CHIP_REV		0x0c