This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / arch / sh / boards / renesas / r7780rp / led.c

diff --git a/arch/sh/boards/renesas/r7780rp/led.c b/arch/sh/boards/renesas/r7780rp/led.c
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+++ b/arch/sh/boards/renesas/r7780rp/led.c
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+/*
+ * 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 Solutions HIGHLANDER R7780RP-1 specific LED code.
+ */
+#include <linux/sched.h>
+#include <asm/io.h>
+#include <asm/r7780rp/r7780rp.h>
+
+/* Cycle the LED's in the clasic Knightriger/Sun pattern */
+void heartbeat_r7780rp(void)
+{
+       static unsigned int cnt = 0, period = 0;
+       volatile unsigned short *p = (volatile unsigned short *)PA_OBLED;
+       static unsigned bit = 0, up = 1;
+       unsigned bit_pos[] = {2, 1, 0, 3, 6, 5, 4, 7};
+
+       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_pos[bit];
+       if (up)
+               if (bit == 7) {
+                       bit--;
+                       up = 0;
+               } else
+                       bit++;
+       else if (bit == 0)
+               up = 1;
+       else
+               bit--;
+}