44 lines
979 B
C
44 lines
979 B
C
/*
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* Copyright (C) Atom Create Engineering Co., Ltd.
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*
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* May be copied or modified under the terms of GNU General Public
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* License. See linux/COPYING for more information.
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*
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* This file contains Renesas Solutions HIGHLANDER R7780RP-1 specific LED code.
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*/
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#include <linux/sched.h>
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#include <asm/io.h>
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#include <asm/r7780rp/r7780rp.h>
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/* Cycle the LED's in the clasic Knightriger/Sun pattern */
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void heartbeat_r7780rp(void)
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{
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static unsigned int cnt = 0, period = 0;
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volatile unsigned short *p = (volatile unsigned short *)PA_OBLED;
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static unsigned bit = 0, up = 1;
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unsigned bit_pos[] = {2, 1, 0, 3, 6, 5, 4, 7};
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cnt += 1;
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if (cnt < period)
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return;
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cnt = 0;
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/* Go through the points (roughly!):
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* f(0)=10, f(1)=16, f(2)=20, f(5)=35, f(int)->110
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*/
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period = 110 - ((300 << FSHIFT)/((avenrun[0]/5) + (3<<FSHIFT)));
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*p = 1 << bit_pos[bit];
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if (up)
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if (bit == 7) {
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bit--;
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up = 0;
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} else
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bit++;
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else if (bit == 0)
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up = 1;
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else
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bit--;
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}
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