patch-2.4.10 linux/arch/sh/kernel/led_7751se.c

• Lines: 69
• Date: Sat Sep 8 12:29:09 2001
• Orig file: v2.4.9/linux/arch/sh/kernel/led_7751se.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.9/linux/arch/sh/kernel/led_7751se.c linux/arch/sh/kernel/led_7751se.c
@@ -0,0 +1,68 @@
+/*
+ * linux/arch/sh/kernel/led_se.c
+ *
+ * Copyright (C) 2000 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 Solution Engine specific LED code.
+ */
+
+#include <linux/config.h>
+#include <asm/hitachi_7751se.h>
+
+static void mach_led(int position, int value)
+{
+	volatile unsigned short* p = (volatile unsigned short*)PA_LED;
+
+	if (value) {
+		*p |= (1<<8);
+	} else {
+		*p &= ~(1<<8);
+	}
+}
+
+#ifdef CONFIG_HEARTBEAT
+
+#include <linux/sched.h>
+
+/* Cycle the LED's in the clasic Knightrider/Sun pattern */
+void heartbeat_7751se(void)
+{
+	static unsigned int cnt = 0, period = 0;
+	volatile unsigned short* p = (volatile unsigned short*)PA_LED;
+	static unsigned bit = 0, up = 1;
+
+	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(inf)->110
+	 */
+	period = 110 - ( (300<<FSHIFT)/
+			 ((avenrun[0]/5) + (3<<FSHIFT)) );
+
+	if (up) {
+		if (bit == 7) {
+			bit--;
+			up=0;
+		} else {
+			bit ++;
+		}
+	} else {
+		if (bit == 0) {
+			bit++;
+			up=1;
+		} else {
+			bit--;
+		}
+	}
+	*p = 1<<(bit+8);
+
+}
+#endif /* CONFIG_HEARTBEAT */