UART01x_FR         13 arch/arm/include/debug/pl01x.S #undef UART01x_FR
UART01x_FR         15 arch/arm/include/debug/pl01x.S #define UART01x_FR     0x14
UART01x_FR         29 include/linux/amba/serial.h #define UART01x_FR		0x18	/* Flag register (Read only). */