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/include/mk48t59.h

@@ -0,0 +1,48 @@
+/*
+ * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Andreas Heppel <aheppel@sysgo.de>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+/*
+ * Date & Time support for the MK48T59 RTC
+ */
+
+
+#if defined(CONFIG_RTC_MK48T59) && defined(CONFIG_CMD_DATE)
+
+#define RTC_PORT_ADDR0		CONFIG_SYS_ISA_IO +  0x70
+#define RTC_PORT_ADDR1		RTC_PORT_ADDR0 +  0x1
+#define RTC_PORT_DATA		CONFIG_SYS_ISA_IO +  0x76
+
+/* RTC Offsets */
+#define RTC_SECONDS             0x1FF9
+#define RTC_MINUTES             0x1FFA
+#define RTC_HOURS               0x1FFB
+#define RTC_DAY_OF_WEEK         0x1FFC
+#define RTC_DAY_OF_MONTH        0x1FFD
+#define RTC_MONTH               0x1FFE
+#define RTC_YEAR                0x1FFF
+
+#define RTC_CONTROLA            0x1FF8
+#define RTC_CA_WRITE            0x80
+#define RTC_CA_READ             0x40
+#define RTC_CA_CALIB_SIGN       0x20
+#define RTC_CA_CALIB_MASK       0x1f
+
+#define RTC_CONTROLB            0x1FF9
+#define RTC_CB_STOP             0x80
+
+#define RTC_WATCHDOG			0x1FF7
+#define RTC_WDS					0x80
+#define RTC_WD_RB_16TH			0x0
+#define RTC_WD_RB_4TH			0x1
+#define RTC_WD_RB_1				0x2
+#define RTC_WD_RB_4				0x3
+
+void rtc_set_watchdog(short multi, short res);
+void *nvram_read(void *dest, const short src, size_t count);
+void nvram_write(short dest, const void *src, size_t count);
+
+#endif