| * linux/arch/sh/overdrive/led.c |
| * Copyright (C) 1999 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 an Overdrive specific LED feature. |
| #include <asm/overdrive/overdrive.h> |
| static void mach_led(int position, int value) |
| reg = readl(OVERDRIVE_CTRL); |
| writel(reg, OVERDRIVE_CTRL); |
| local_irq_restore(flags); |
| /* acts like an actual heart beat -- ie thump-thump-pause... */ |
| static unsigned cnt = 0, period = 0, dist = 0; |
| if (cnt == 0 || cnt == dist) |
| else if (cnt == 7 || cnt == dist+7) |
| /* 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, |
| period = ((672<<FSHIFT)/(5*avenrun[0]+(7<<FSHIFT))) + 30; |
| #endif /* CONFIG_HEARTBEAT */ |