LSR_DR            118 arch/arm/mach-pxa/include/mach/regs-uart.h #define LSR_DR		(1 << 0)	/* Data Ready */
LSR_DR             31 arch/powerpc/kernel/udbg_16550.c #define LSR_DR   0x01  /* Data ready */
LSR_DR            139 arch/sh/include/asm/smc37c93x.h #define LSR_DR		0x0100	/* Data Ready */