avionic design with actual uboot and tooling

submodule of avionic design uboot bootloader and with included tools to
get you started , read readme.md and readme-tk1-loader.md

u-boot/drivers/misc/twl4030_led.c

@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2009 Wind River Systems, Inc.
+ * Tom Rix <Tom.Rix at windriver.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ *
+ * twl4030_led_init is from cpu/omap3/common.c, power_init_r
+ *
+ * (C) Copyright 2004-2008
+ * Texas Instruments, <www.ti.com>
+ *
+ * Author :
+ *	Sunil Kumar <sunilsaini05 at gmail.com>
+ *	Shashi Ranjan <shashiranjanmca05 at gmail.com>
+ *
+ * Derived from Beagle Board and 3430 SDP code by
+ *	Richard Woodruff <r-woodruff2 at ti.com>
+ *	Syed Mohammed Khasim <khasim at ti.com>
+ */
+
+#include <twl4030.h>
+
+void twl4030_led_init(unsigned char ledon_mask)
+{
+	/* LEDs need to have corresponding PWMs enabled */
+	if (ledon_mask & TWL4030_LED_LEDEN_LEDAON)
+		ledon_mask |= TWL4030_LED_LEDEN_LEDAPWM;
+	if (ledon_mask & TWL4030_LED_LEDEN_LEDBON)
+		ledon_mask |= TWL4030_LED_LEDEN_LEDBPWM;
+
+	twl4030_i2c_write_u8(TWL4030_CHIP_LED, TWL4030_LED_LEDEN,
+			     ledon_mask);
+
+}