1 files changed, 67 insertions, 0 deletions
diff --git a/arch/sh/boards/renesas/rts7751r2d/led.c b/arch/sh/boards/renesas/rts7751r2d/led.c
new file mode 100644
index 000000000000..9993259a894f
--- /dev/null
+++ b/arch/sh/boards/renesas/rts7751r2d/led.c
@@ -0,0 +1,67 @@
+/*
+ * linux/arch/sh/kernel/led_rts7751r2d.c
+ *
+ * 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 Technology Sales RTS7751R2D specific LED code.
+ */
+
+#include <linux/config.h>
+#include <asm/io.h>
+#include <asm/rts7751r2d/rts7751r2d.h>
+
+extern unsigned int debug_counter;
+
+#ifdef CONFIG_HEARTBEAT
+
+#include <linux/sched.h>
+
+/* Cycle the LED's in the clasic Knightriger/Sun pattern */
+void heartbeat_rts7751r2d(void)
+{
+	static unsigned int cnt = 0, period = 0;
+	volatile unsigned short *p = (volatile unsigned short *)PA_OUTPORT;
+	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(int)->110
+	 */
+	period = 110 - ((300 << FSHIFT)/((avenrun[0]/5) + (3<<FSHIFT)));
+
+	*p = 1 << bit;
+	if (up)
+		if (bit == 7) {
+			bit--;
+			up = 0;
+		} else
+			bit++;
+	else if (bit == 0)
+		up = 1;
+	else
+		bit--;
+}
+#endif /* CONFIG_HEARTBEAT */
+
+void rts7751r2d_led(unsigned short value)
+{
+	ctrl_outw(value, PA_OUTPORT);
+}
+
+void debug_led_disp(void)
+{
+	unsigned short value;
+
+	value = (unsigned short)debug_counter++;
+	rts7751r2d_led(value);
+	if (value == 0xff)
+		debug_counter = 0;
+}