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/board/nvidia/harmony/Kconfig

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+if TARGET_HARMONY
+
+config SYS_BOARD
+	default "harmony"
+
+config SYS_VENDOR
+	default "nvidia"
+
+config SYS_CONFIG_NAME
+	default "harmony"
+
+endif

u-boot/board/nvidia/harmony/MAINTAINERS

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+HARMONY BOARD
+M:	Tom Warren <twarren@nvidia.com>
+S:	Maintained
+F:	board/nvidia/harmony/
+F:	include/configs/harmony.h
+F:	configs/harmony_defconfig

u-boot/board/nvidia/harmony/Makefile

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+#
+#  (C) Copyright 2010,2011
+#  NVIDIA Corporation <www.nvidia.com>
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y	:= harmony.o

u-boot/board/nvidia/harmony/harmony.c

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+/*
+ *  (C) Copyright 2010,2011
+ *  NVIDIA Corporation <www.nvidia.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <lcd.h>
+#include <asm/io.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/funcmux.h>
+#include <asm/arch/pinmux.h>
+#include <asm/arch/tegra.h>
+#include <asm/gpio.h>
+
+#ifdef CONFIG_TEGRA_MMC
+/*
+ * Routine: pin_mux_mmc
+ * Description: setup the pin muxes/tristate values for the SDMMC(s)
+ */
+void pin_mux_mmc(void)
+{
+	funcmux_select(PERIPH_ID_SDMMC4, FUNCMUX_SDMMC4_ATB_GMA_GME_8_BIT);
+	funcmux_select(PERIPH_ID_SDMMC2, FUNCMUX_SDMMC2_DTA_DTD_8BIT);
+
+	/* For power GPIO PI6 */
+	pinmux_tristate_disable(PMUX_PINGRP_ATA);
+	/* For CD GPIO PH2 */
+	pinmux_tristate_disable(PMUX_PINGRP_ATD);
+
+	/* For power GPIO PT3 */
+	pinmux_tristate_disable(PMUX_PINGRP_DTB);
+	/* For CD GPIO PI5 */
+	pinmux_tristate_disable(PMUX_PINGRP_ATC);
+}
+#endif
+
+void pin_mux_usb(void)
+{
+	funcmux_select(PERIPH_ID_USB2, FUNCMUX_USB2_ULPI);
+	pinmux_set_func(PMUX_PINGRP_CDEV2, PMUX_FUNC_PLLP_OUT4);
+	pinmux_tristate_disable(PMUX_PINGRP_CDEV2);
+	/* USB2 PHY reset GPIO */
+	pinmux_tristate_disable(PMUX_PINGRP_UAC);
+}
+
+void pin_mux_display(void)
+{
+	pinmux_set_func(PMUX_PINGRP_SDC, PMUX_FUNC_PWM);
+	pinmux_tristate_disable(PMUX_PINGRP_SDC);
+}