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-rw-r--r--arch/sh/boards/overdrive/led.c58
1 files changed, 0 insertions, 58 deletions
diff --git a/arch/sh/boards/overdrive/led.c b/arch/sh/boards/overdrive/led.c
deleted file mode 100644
index 860d7f204a4e..000000000000
--- a/arch/sh/boards/overdrive/led.c
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1/*
2 * linux/arch/sh/overdrive/led.c
3 *
4 * Copyright (C) 1999 Stuart Menefy <stuart.menefy@st.com>
5 *
6 * May be copied or modified under the terms of the GNU General Public
7 * License. See linux/COPYING for more information.
8 *
9 * This file contains an Overdrive specific LED feature.
10 */
11
12#include <asm/system.h>
13#include <asm/io.h>
14#include <asm/overdrive/overdrive.h>
15
16static void mach_led(int position, int value)
17{
18 unsigned long flags;
19 unsigned long reg;
20
21 local_irq_save(flags);
22
23 reg = readl(OVERDRIVE_CTRL);
24 if (value) {
25 reg |= (1<<3);
26 } else {
27 reg &= ~(1<<3);
28 }
29 writel(reg, OVERDRIVE_CTRL);
30
31 local_irq_restore(flags);
32}
33
34#ifdef CONFIG_HEARTBEAT
35
36#include <linux/sched.h>
37
38/* acts like an actual heart beat -- ie thump-thump-pause... */
39void heartbeat_od(void)
40{
41 static unsigned cnt = 0, period = 0, dist = 0;
42
43 if (cnt == 0 || cnt == dist)
44 mach_led( -1, 1);
45 else if (cnt == 7 || cnt == dist+7)
46 mach_led( -1, 0);
47
48 if (++cnt > period) {
49 cnt = 0;
50 /* The hyperbolic function below modifies the heartbeat period
51 * length in dependency of the current (5min) load. It goes
52 * through the points f(0)=126, f(1)=86, f(5)=51,
53 * f(inf)->30. */
54 period = ((672<<FSHIFT)/(5*avenrun[0]+(7<<FSHIFT))) + 30;
55 dist = period / 4;
56 }
57}
58#endif /* CONFIG_HEARTBEAT */