/* * linux/arch/sh/stboards/led.c * * Copyright (C) 2000 Stuart Menefy <stuart.menefy@st.com> * * May be copied or modified under the terms of the GNU General Public * License.  See linux/COPYING for more information. * * This file contains ST40STB1 HARP and compatible code. */#include <linux/config.h>#include <asm/io.h>#include <asm/harp/harp.h>/* Harp: Flash LD10 (front pannel) connected to EPLD (IC8) *//* Overdrive: Flash LD1 (front panel) connected to EPLD (IC4) *//* Works for HARP and overdrive */static void mach_led(int position, int value){	if (value) {		ctrl_outl(EPLD_LED_ON, EPLD_LED);	} else {		ctrl_outl(EPLD_LED_OFF, EPLD_LED);	}}#ifdef CONFIG_HEARTBEAT#include <linux/sched.h>/* acts like an actual heart beat -- ie thump-thump-pause... */void heartbeat_harp(void){	static unsigned cnt = 0, period = 0, dist = 0;	if (cnt == 0 || cnt == dist)		mach_led( -1, 1);	else if (cnt == 7 || cnt == dist+7)		mach_led( -1, 0);	if (++cnt > period) {		cnt = 0;		/* The hyperbolic function below modifies the heartbeat period		 * length in dependency of the current (5min) load. It goes		 * through the points f(0)=126, f(1)=86, f(5)=51,		 * f(inf)->30. */		period = ((672<<FSHIFT)/(5*avenrun[0]+(7<<FSHIFT))) + 30;		dist = period / 4;	}}#endif