/* * linux/include/asm-arm/arch-ebsa110/time.h * * Copyright (c) 1996,1997,1998 Russell King. * * No real time clock on the evalulation board! * * Changelog: *  10-Oct-1996	RMK	Created *  04-Dec-1997	RMK	Updated for new arch/arm/kernel/time.c *  07-Aug-1998	RMK	Updated for arch/arm/kernel/leds.c *  28-Dec-1998	APH	Made leds code optional */#include <linux/config.h>#include <asm/leds.h>#define IRQ_TIMER IRQ_EBSA110_TIMER0#define MCLK_47_8#if defined(MCLK_42_3)#define PIT1_COUNT 0xecbe#elif defined(MCLK_47_8)/* * This should be 0x10AE1, but that doesn't exactly fit. * We run the timer interrupt at 5ms, and then divide it by * two in software...  This is so that the user processes * see exactly the same model whichever ARM processor they're * running on. */#define PIT1_COUNT 0x8570#define DIVISOR 2#endif extern __inline__ unsigned long gettimeoffset (void){	return 0;}static void timer_interrupt(int irq, void *dev_id, struct pt_regs *regs){	*PIT_T1 = (PIT1_COUNT) & 0xff;	*PIT_T1 = (PIT1_COUNT) >> 8;#ifdef CONFIG_LEDS	{		static int count = 50;		if (--count == 0) {			count = 50;			leds_event(led_timer);		}	}#endif	{#ifdef DIVISOR		static unsigned int divisor;		if (divisor-- == 0) {			divisor = DIVISOR - 1;#else		{#endif			do_timer(regs);		}	}}static struct irqaction timerirq = {	timer_interrupt,	0,	0,	"timer",	NULL,	NULL};/* * Set up timer interrupt, and return the current time in seconds. */extern __inline__ void setup_timer(void){	/*	 * Timer 1, mode 0, 16-bit, autoreload	 */	*PIT_CTRL = 0x70;	/*	 * Refresh counter clocked at 47.8MHz/7 = 146.4ns	 * We want centi-second interrupts	 */	*PIT_T1 = (PIT1_COUNT) & 0xff;	*PIT_T1 = (PIT1_COUNT) >> 8;	/*	 * Default the date to 1 Jan 1970 0:0:0	 * You will have to run a time daemon to set the	 * clock correctly at bootup	 */	xtime.tv_sec = mktime(1970, 1, 1, 0, 0, 0);	setup_arm_irq(IRQ_TIMER, &timerirq);}