CHIP_ID_REV_MASK   27 arch/mips/include/asm/mach-ralink/rt288x.h #define CHIP_ID_REV_MASK		0xff
CHIP_ID_REV_MASK   67 arch/mips/include/asm/mach-ralink/rt305x.h #define CHIP_ID_REV_MASK		0xff