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/power/pmic/pmic-uclass.c

@@ -0,0 +1,171 @@
+/*
+ * Copyright (C) 2014-2015 Samsung Electronics
+ * Przemyslaw Marczak <p.marczak@samsung.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <fdtdec.h>
+#include <errno.h>
+#include <dm.h>
+#include <vsprintf.h>
+#include <dm/lists.h>
+#include <dm/device-internal.h>
+#include <dm/uclass-internal.h>
+#include <power/pmic.h>
+#include <linux/ctype.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#if CONFIG_IS_ENABLED(PMIC_CHILDREN)
+int pmic_bind_children(struct udevice *pmic, int offset,
+		       const struct pmic_child_info *child_info)
+{
+	const struct pmic_child_info *info;
+	const void *blob = gd->fdt_blob;
+	struct driver *drv;
+	struct udevice *child;
+	const char *node_name;
+	int bind_count = 0;
+	int node;
+	int prefix_len;
+	int ret;
+
+	debug("%s for '%s' at node offset: %d\n", __func__, pmic->name,
+	      pmic->of_offset);
+
+	for (node = fdt_first_subnode(blob, offset);
+	     node > 0;
+	     node = fdt_next_subnode(blob, node)) {
+		node_name = fdt_get_name(blob, node, NULL);
+
+		debug("* Found child node: '%s' at offset:%d\n", node_name,
+								 node);
+
+		child = NULL;
+		for (info = child_info; info->prefix && info->driver; info++) {
+			debug("  - compatible prefix: '%s'\n", info->prefix);
+
+			prefix_len = strlen(info->prefix);
+			if (strncmp(info->prefix, node_name, prefix_len))
+				continue;
+
+			drv = lists_driver_lookup_name(info->driver);
+			if (!drv) {
+				debug("  - driver: '%s' not found!\n",
+				      info->driver);
+				continue;
+			}
+
+			debug("  - found child driver: '%s'\n", drv->name);
+
+			ret = device_bind(pmic, drv, node_name, NULL,
+					  node, &child);
+			if (ret) {
+				debug("  - child binding error: %d\n", ret);
+				continue;
+			}
+
+			debug("  - bound child device: '%s'\n", child->name);
+
+			child->driver_data = trailing_strtol(node_name);
+
+			debug("  - set 'child->driver_data': %lu\n",
+			      child->driver_data);
+			break;
+		}
+
+		if (child)
+			bind_count++;
+		else
+			debug("  - compatible prefix not found\n");
+	}
+
+	debug("Bound: %d childs for PMIC: '%s'\n", bind_count, pmic->name);
+	return bind_count;
+}
+#endif
+
+int pmic_get(const char *name, struct udevice **devp)
+{
+	return uclass_get_device_by_name(UCLASS_PMIC, name, devp);
+}
+
+int pmic_reg_count(struct udevice *dev)
+{
+	const struct dm_pmic_ops *ops = dev_get_driver_ops(dev);
+
+	if (!ops || !ops->reg_count)
+		return -ENOSYS;
+
+	return ops->reg_count(dev);
+}
+
+int pmic_read(struct udevice *dev, uint reg, uint8_t *buffer, int len)
+{
+	const struct dm_pmic_ops *ops = dev_get_driver_ops(dev);
+
+	if (!buffer)
+		return -EFAULT;
+
+	if (!ops || !ops->read)
+		return -ENOSYS;
+
+	return ops->read(dev, reg, buffer, len);
+}
+
+int pmic_write(struct udevice *dev, uint reg, const uint8_t *buffer, int len)
+{
+	const struct dm_pmic_ops *ops = dev_get_driver_ops(dev);
+
+	if (!buffer)
+		return -EFAULT;
+
+	if (!ops || !ops->write)
+		return -ENOSYS;
+
+	return ops->write(dev, reg, buffer, len);
+}
+
+int pmic_reg_read(struct udevice *dev, uint reg)
+{
+	u8 byte;
+	int ret;
+
+	debug("%s: reg=%x", __func__, reg);
+	ret = pmic_read(dev, reg, &byte, 1);
+	debug(", value=%x, ret=%d\n", byte, ret);
+
+	return ret ? ret : byte;
+}
+
+int pmic_reg_write(struct udevice *dev, uint reg, uint value)
+{
+	u8 byte = value;
+	int ret;
+
+	debug("%s: reg=%x, value=%x", __func__, reg, value);
+	ret = pmic_write(dev, reg, &byte, 1);
+	debug(", ret=%d\n", ret);
+
+	return ret;
+}
+
+int pmic_clrsetbits(struct udevice *dev, uint reg, uint clr, uint set)
+{
+	u8 byte;
+	int ret;
+
+	ret = pmic_reg_read(dev, reg);
+	if (ret < 0)
+		return ret;
+	byte = (ret & ~clr) | set;
+
+	return pmic_reg_write(dev, reg, byte);
+}
+
+UCLASS_DRIVER(pmic) = {
+	.id		= UCLASS_PMIC,
+	.name		= "pmic",
+};