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/drivers/mmc/zynq_sdhci.c

@@ -0,0 +1,65 @@
+/*
+ * (C) Copyright 2013 - 2015 Xilinx, Inc.
+ *
+ * Xilinx Zynq SD Host Controller Interface
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <fdtdec.h>
+#include <libfdt.h>
+#include <malloc.h>
+#include <sdhci.h>
+
+#ifndef CONFIG_ZYNQ_SDHCI_MIN_FREQ
+# define CONFIG_ZYNQ_SDHCI_MIN_FREQ	0
+#endif
+
+static int arasan_sdhci_probe(struct udevice *dev)
+{
+	struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
+	struct sdhci_host *host = dev_get_priv(dev);
+
+	host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD |
+		       SDHCI_QUIRK_BROKEN_R1B;
+
+#ifdef CONFIG_ZYNQ_HISPD_BROKEN
+	host->quirks |= SDHCI_QUIRK_NO_HISPD_BIT;
+#endif
+
+	host->version = sdhci_readw(host, SDHCI_HOST_VERSION);
+
+	add_sdhci(host, CONFIG_ZYNQ_SDHCI_MAX_FREQ,
+		  CONFIG_ZYNQ_SDHCI_MIN_FREQ);
+
+	upriv->mmc = host->mmc;
+	host->mmc->dev = dev;
+
+	return 0;
+}
+
+static int arasan_sdhci_ofdata_to_platdata(struct udevice *dev)
+{
+	struct sdhci_host *host = dev_get_priv(dev);
+
+	host->name = dev->name;
+	host->ioaddr = (void *)dev_get_addr(dev);
+
+	return 0;
+}
+
+static const struct udevice_id arasan_sdhci_ids[] = {
+	{ .compatible = "arasan,sdhci-8.9a" },
+	{ }
+};
+
+U_BOOT_DRIVER(arasan_sdhci_drv) = {
+	.name		= "arasan_sdhci",
+	.id		= UCLASS_MMC,
+	.of_match	= arasan_sdhci_ids,
+	.ofdata_to_platdata = arasan_sdhci_ofdata_to_platdata,
+	.probe		= arasan_sdhci_probe,
+	.priv_auto_alloc_size = sizeof(struct sdhci_host),
+};