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/*
* linux/arch/sh/boards/renesas/rts7751r2d/led.c
*
* Copyright (C) Atom Create Engineering Co., Ltd.
*
* May be copied or modified under the terms of GNU General Public
* License. See linux/COPYING for more information.
*
* This file contains Renesas Technology Sales RTS7751R2D specific LED code.
*/
#include <linux/io.h>
#include <linux/sched.h>
#include <asm/rts7751r2d.h>
/* Cycle the LED's in the clasic Knightriger/Sun pattern */
void heartbeat_rts7751r2d(void)
{
static unsigned int cnt = 0, period = 0;
volatile unsigned short *p = (volatile unsigned short *)PA_OUTPORT;
static unsigned bit = 0, up = 1;
cnt += 1;
if (cnt < period)
return;
cnt = 0;
/* Go through the points (roughly!):
* f(0)=10, f(1)=16, f(2)=20, f(5)=35, f(int)->110
*/
period = 110 - ((300 << FSHIFT)/((avenrun[0]/5) + (3<<FSHIFT)));
*p = 1 << bit;
if (up)
if (bit == 7) {
bit--;
up = 0;
} else
bit++;
else if (bit == 0)
up = 1;
else
bit--;
}
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