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/arch/arm/include/asm/arch-stm32f7/gpt.h

@@ -0,0 +1,53 @@
+/*
+ * (C) Copyright 2016
+ * Vikas Manocha, ST Micoelectronics, vikas.manocha@st.com.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef _STM32_GPT_H
+#define _STM32_GPT_H
+
+#include <asm/arch/stm32.h>
+
+struct gpt_regs {
+	u32 cr1;
+	u32 cr2;
+	u32 smcr;
+	u32 dier;
+	u32 sr;
+	u32 egr;
+	u32 ccmr1;
+	u32 ccmr2;
+	u32 ccer;
+	u32 cnt;
+	u32 psc;
+	u32 arr;
+	u32 reserved;
+	u32 ccr1;
+	u32 ccr2;
+	u32 ccr3;
+	u32 ccr4;
+	u32 reserved1;
+	u32 dcr;
+	u32 dmar;
+	u32 tim2_5_or;
+};
+
+struct gpt_regs *const gpt1_regs_ptr =
+	(struct gpt_regs *)TIM2_BASE;
+
+/* Timer control1 register  */
+#define GPT_CR1_CEN			0x0001
+#define GPT_MODE_AUTO_RELOAD		(1 << 7)
+
+/* Auto reload register for free running config */
+#define GPT_FREE_RUNNING		0xFFFFFFFF
+
+/* Timer, HZ specific defines */
+#define CONFIG_STM32_HZ			1000
+
+/* Timer Event Generation registers */
+#define TIM_EGR_UG			(1 << 0)
+
+#endif