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/ti/am335x/board.h

@@ -0,0 +1,69 @@
+/*
+ * board.h
+ *
+ * TI AM335x boards information header
+ *
+ * Copyright (C) 2011, Texas Instruments, Incorporated - http://www.ti.com/
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef _BOARD_H_
+#define _BOARD_H_
+
+static inline int board_is_bone(void)
+{
+	return board_ti_is("A335BONE");
+}
+
+static inline int board_is_bone_lt(void)
+{
+	return board_ti_is("A335BNLT");
+}
+
+static inline int board_is_bbg1(void)
+{
+	return board_is_bone_lt() && !strncmp(board_ti_get_rev(), "BBG1", 4);
+}
+
+static inline int board_is_evm_sk(void)
+{
+	return board_ti_is("A335X_SK");
+}
+
+static inline int board_is_idk(void)
+{
+	return !strncmp(board_ti_get_config(), "SKU#02", 6);
+}
+
+static inline int board_is_gp_evm(void)
+{
+	return board_ti_is("A33515BB");
+}
+
+static inline int board_is_evm_15_or_later(void)
+{
+	return (board_is_gp_evm() &&
+		strncmp("1.5", board_ti_get_rev(), 3) <= 0);
+}
+
+static inline int board_is_icev2(void)
+{
+	return board_ti_is("A335_ICE") && !strncmp("2", board_ti_get_rev(), 1);
+}
+
+/*
+ * We have three pin mux functions that must exist.  We must be able to enable
+ * uart0, for initial output and i2c0 to read the main EEPROM.  We then have a
+ * main pinmux function that can be overridden to enable all other pinmux that
+ * is required on the board.
+ */
+void enable_uart0_pin_mux(void);
+void enable_uart1_pin_mux(void);
+void enable_uart2_pin_mux(void);
+void enable_uart3_pin_mux(void);
+void enable_uart4_pin_mux(void);
+void enable_uart5_pin_mux(void);
+void enable_i2c0_pin_mux(void);
+void enable_board_pin_mux(void);
+#endif