IIR_IP             90 arch/arm/mach-pxa/include/mach/regs-uart.h #define IIR_IP		(1 << 0)	/* Interrupt Pending (active low) */
IIR_IP            103 arch/sh/include/asm/smc37c93x.h #define IIR_IP		0x0100	/* "0" if Interrupt Pending */