2 * linux/arch/sh/kernel/led_rts7751r2d.c
4 * Copyright (C) Atom Create Engineering Co., Ltd.
6 * May be copied or modified under the terms of GNU General Public
7 * License. See linux/COPYING for more information.
9 * This file contains Renesas Technology Sales RTS7751R2D specific LED code.
13 #include <asm/rts7751r2d/rts7751r2d.h>
15 #ifdef CONFIG_HEARTBEAT
17 #include <linux/sched.h>
19 /* Cycle the LED's in the clasic Knightriger/Sun pattern */
20 void heartbeat_rts7751r2d(void)
22 static unsigned int cnt = 0, period = 0;
23 volatile unsigned short *p = (volatile unsigned short *)PA_OUTPORT;
24 static unsigned bit = 0, up = 1;
32 /* Go through the points (roughly!):
33 * f(0)=10, f(1)=16, f(2)=20, f(5)=35, f(int)->110
35 period = 110 - ((300 << FSHIFT)/((avenrun[0]/5) + (3<<FSHIFT)));
49 #endif /* CONFIG_HEARTBEAT */
51 void rts7751r2d_led(unsigned short value)
53 ctrl_outw(value, PA_OUTPORT);