1 files changed, 45 insertions, 0 deletions

diff --git a/arch/sh/boards/renesas/r7780rp/led.c b/arch/sh/boards/renesas/r7780rp/led.c
new file mode 100644
index 00000000000..9f02766b6f5
--- /dev/null
+++ b/arch/sh/boards/renesas/r7780rp/led.c
@@ -0,0 +1,45 @@
+/*
+ * 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/config.h>
+#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--;
+}