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/Marvell/guruplug/guruplug.c

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+/*
+ * (C) Copyright 2009
+ * Marvell Semiconductor <www.marvell.com>
+ * Written-by: Siddarth Gore <gores@marvell.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <miiphy.h>
+#include <asm/arch/cpu.h>
+#include <asm/arch/soc.h>
+#include <asm/arch/mpp.h>
+#include "guruplug.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int board_early_init_f(void)
+{
+	/*
+	 * default gpio configuration
+	 * There are maximum 64 gpios controlled through 2 sets of registers
+	 * the  below configuration configures mainly initial LED status
+	 */
+	mvebu_config_gpio(GURUPLUG_OE_VAL_LOW,
+			  GURUPLUG_OE_VAL_HIGH,
+			  GURUPLUG_OE_LOW, GURUPLUG_OE_HIGH);
+
+	/* Multi-Purpose Pins Functionality configuration */
+	static const u32 kwmpp_config[] = {
+		MPP0_NF_IO2,
+		MPP1_NF_IO3,
+		MPP2_NF_IO4,
+		MPP3_NF_IO5,
+		MPP4_NF_IO6,
+		MPP5_NF_IO7,
+		MPP6_SYSRST_OUTn,
+		MPP7_GPO,	/* GPIO_RST */
+		MPP8_TW_SDA,
+		MPP9_TW_SCK,
+		MPP10_UART0_TXD,
+		MPP11_UART0_RXD,
+		MPP12_SD_CLK,
+		MPP13_SD_CMD,
+		MPP14_SD_D0,
+		MPP15_SD_D1,
+		MPP16_SD_D2,
+		MPP17_SD_D3,
+		MPP18_NF_IO0,
+		MPP19_NF_IO1,
+		MPP20_GE1_0,
+		MPP21_GE1_1,
+		MPP22_GE1_2,
+		MPP23_GE1_3,
+		MPP24_GE1_4,
+		MPP25_GE1_5,
+		MPP26_GE1_6,
+		MPP27_GE1_7,
+		MPP28_GE1_8,
+		MPP29_GE1_9,
+		MPP30_GE1_10,
+		MPP31_GE1_11,
+		MPP32_GE1_12,
+		MPP33_GE1_13,
+		MPP34_GE1_14,
+		MPP35_GE1_15,
+		MPP36_GPIO,
+		MPP37_GPIO,
+		MPP38_GPIO,
+		MPP39_GPIO,
+		MPP40_TDM_SPI_SCK,
+		MPP41_TDM_SPI_MISO,
+		MPP42_TDM_SPI_MOSI,
+		MPP43_GPIO,
+		MPP44_GPIO,
+		MPP45_GPIO,
+		MPP46_GPIO, 	/* M_RLED */
+		MPP47_GPIO,	/* M_GLED */
+		MPP48_GPIO,	/* B_RLED */
+		MPP49_GPIO,	/* B_GLED */
+		0
+	};
+	kirkwood_mpp_conf(kwmpp_config, NULL);
+	return 0;
+}
+
+int board_init(void)
+{
+	/*
+	 * arch number of board
+	 */
+	gd->bd->bi_arch_number = MACH_TYPE_GURUPLUG;
+
+	/* adress of boot parameters */
+	gd->bd->bi_boot_params = mvebu_sdram_bar(0) + 0x100;
+
+	return 0;
+}
+
+#ifdef CONFIG_RESET_PHY_R
+void mv_phy_88e1121_init(char *name)
+{
+	u16 reg;
+	u16 devadr;
+
+	if (miiphy_set_current_dev(name))
+		return;
+
+	/* command to read PHY dev address */
+	if (miiphy_read(name, 0xEE, 0xEE, (u16 *) &devadr)) {
+		printf("Err..%s could not read PHY dev address\n",
+			__FUNCTION__);
+		return;
+	}
+
+	/*
+	 * Enable RGMII delay on Tx and Rx for CPU port
+	 * Ref: sec 4.7.2 of chip datasheet
+	 */
+	miiphy_write(name, devadr, MV88E1121_PGADR_REG, 2);
+	miiphy_read(name, devadr, MV88E1121_MAC_CTRL2_REG, &reg);
+	reg |= (MV88E1121_RGMII_RXTM_CTRL | MV88E1121_RGMII_TXTM_CTRL);
+	miiphy_write(name, devadr, MV88E1121_MAC_CTRL2_REG, reg);
+	miiphy_write(name, devadr, MV88E1121_PGADR_REG, 0);
+
+	/* reset the phy */
+	miiphy_reset(name, devadr);
+
+	printf("88E1121 Initialized on %s\n", name);
+}
+
+void reset_phy(void)
+{
+	/* configure and initialize both PHY's */
+	mv_phy_88e1121_init("egiga0");
+	mv_phy_88e1121_init("egiga1");
+}
+#endif /* CONFIG_RESET_PHY_R */