--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/target-utils/c139explore/backlight.c	Sat Jun 11 00:13:35 2016 +0000
@@ -0,0 +1,42 @@
+#include <sys/types.h>
+#include <string.h>
+#include "types.h"
+#include "abbdefs.h"
+
+#define	GPIO_OUT_REG		(*(volatile u16 *) 0xfffe4802)
+#define	BACKLIGHT_GPIO_MASK	0x0002
+
+#define	AUXLED_KPBL_OFF	0x000
+#define	AUXLED_KPBL_ON	0x002
+
+void
+cmd_dbl(argbulk)
+	char *argbulk;
+{
+	char *argv[2];
+
+	if (parse_args(argbulk, 1, 1, argv, 0) < 0)
+		return;
+	if (!strcmp(argv[0], "on"))
+		GPIO_OUT_REG |= BACKLIGHT_GPIO_MASK;
+	else if (!strcmp(argv[0], "off"))
+		GPIO_OUT_REG &= ~BACKLIGHT_GPIO_MASK;
+	else
+		printf("ERROR: \"on\" or \"off\" argument expected\n");
+}
+
+void
+cmd_kpbl(argbulk)
+	char *argbulk;
+{
+	char *argv[2];
+
+	if (parse_args(argbulk, 1, 1, argv, 0) < 0)
+		return;
+	if (!strcmp(argv[0], "on"))
+		abb_reg_write(AUXLED, AUXLED_KPBL_ON);
+	else if (!strcmp(argv[0], "off"))
+		abb_reg_write(AUXLED, AUXLED_KPBL_OFF);
+	else
+		printf("ERROR: \"on\" or \"off\" argument expected\n");
+}