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/gumstix/pepper/mux.c

@@ -0,0 +1,83 @@
+/*
+ * Muxing for Gumstix Pepper and AM335x-based boards
+ *
+ * Copyright (C) 2014, Gumstix, Incorporated - http://www.gumstix.com/
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+#include <common.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/arch/hardware.h>
+#include <asm/arch/mux.h>
+#include <asm/io.h>
+#include <i2c.h>
+#include "board.h"
+
+static struct module_pin_mux uart0_pin_mux[] = {
+	{OFFSET(uart0_rxd), (MODE(0) | PULLUP_EN | RXACTIVE)},  /* UART0_RXD */
+	{OFFSET(uart0_txd), (MODE(0) | PULLUDEN)},              /* UART0_TXD */
+	{-1},
+};
+
+static struct module_pin_mux mmc0_pin_mux[] = {
+	{OFFSET(mmc0_dat3), (MODE(0) | RXACTIVE | PULLUP_EN)},  /* MMC0_DAT3 */
+	{OFFSET(mmc0_dat2), (MODE(0) | RXACTIVE | PULLUP_EN)},  /* MMC0_DAT2 */
+	{OFFSET(mmc0_dat1), (MODE(0) | RXACTIVE | PULLUP_EN)},  /* MMC0_DAT1 */
+	{OFFSET(mmc0_dat0), (MODE(0) | RXACTIVE | PULLUP_EN)},  /* MMC0_DAT0 */
+	{OFFSET(mmc0_clk), (MODE(0) | RXACTIVE | PULLUP_EN)},   /* MMC0_CLK */
+	{OFFSET(mmc0_cmd), (MODE(0) | RXACTIVE | PULLUP_EN)},   /* MMC0_CMD */
+	{OFFSET(spi0_cs1), (MODE(5) | RXACTIVE | PULLUP_EN)},   /* MMC0_CD */
+	{-1},
+};
+
+static struct module_pin_mux i2c0_pin_mux[] = {
+	/* I2C_DATA */
+	{OFFSET(i2c0_sda), (MODE(0) | RXACTIVE | PULLUDEN | SLEWCTRL)},
+	/* I2C_SCLK */
+	{OFFSET(i2c0_scl), (MODE(0) | RXACTIVE | PULLUDEN | SLEWCTRL)},
+	{-1},
+};
+
+static struct module_pin_mux rgmii1_pin_mux[] = {
+	{OFFSET(mii1_txen), MODE(2)},                   /* RGMII1_TCTL */
+	{OFFSET(mii1_rxdv), MODE(2) | RXACTIVE},        /* RGMII1_RCTL */
+	{OFFSET(mii1_txd3), MODE(2)},                   /* RGMII1_TD3 */
+	{OFFSET(mii1_txd2), MODE(2)},                   /* RGMII1_TD2 */
+	{OFFSET(mii1_txd1), MODE(2)},                   /* RGMII1_TD1 */
+	{OFFSET(mii1_txd0), MODE(2)},                   /* RGMII1_TD0 */
+	{OFFSET(mii1_txclk), MODE(2)},                  /* RGMII1_TCLK */
+	{OFFSET(mii1_rxclk), MODE(2) | RXACTIVE},       /* RGMII1_RCLK */
+	{OFFSET(mii1_rxd3), MODE(2) | RXACTIVE},        /* RGMII1_RD3 */
+	{OFFSET(mii1_rxd2), MODE(2) | RXACTIVE},        /* RGMII1_RD2 */
+	{OFFSET(mii1_rxd1), MODE(2) | RXACTIVE},        /* RGMII1_RD1 */
+	{OFFSET(mii1_rxd0), MODE(2) | RXACTIVE},        /* RGMII1_RD0 */
+	{OFFSET(mdio_data), MODE(0) | RXACTIVE | PULLUP_EN},/* MDIO_DATA */
+	{OFFSET(mdio_clk), MODE(0) | PULLUP_EN},        /* MDIO_CLK */
+	{OFFSET(rmii1_refclk), MODE(7) | RXACTIVE},     /* ETH_INT */
+	{OFFSET(mii1_col), MODE(7) | PULLUP_EN},        /* PHY_NRESET */
+	{OFFSET(xdma_event_intr1), MODE(3)},
+	{-1},
+};
+
+void enable_uart0_pin_mux(void)
+{
+	configure_module_pin_mux(uart0_pin_mux);
+}
+
+void enable_i2c0_pin_mux(void)
+{
+	configure_module_pin_mux(i2c0_pin_mux);
+}
+
+/*
+ * Do board-specific muxes.
+ */
+void enable_board_pin_mux(void)
+{
+	/* I2C0 */
+	configure_module_pin_mux(i2c0_pin_mux);
+	/* SD Card */
+	configure_module_pin_mux(mmc0_pin_mux);
+	/* Ethernet pinmux. */
+	configure_module_pin_mux(rgmii1_pin_mux);
+}