1 files changed, 46 insertions, 0 deletions

diff --git a/arch/sh/boards/se/7343/led.c b/arch/sh/boards/se/7343/led.c
new file mode 100644
index 000000000000..6a439cf83e46
--- /dev/null
+++ b/arch/sh/boards/se/7343/led.c
@@ -0,0 +1,46 @@
+/*
+ * arch/sh/boards/se/7343/led.c
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/sched.h>
+#include <asm/mach/se7343.h>
+
+/* Cycle the LED's in the clasic Knightrider/Sun pattern */
+void heartbeat_7343se(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 + LED_SHIFT);
+
+}