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-# Copyright (C) 2018-2019 Intel Corporation <www.intel.com>
-#
-# SPDX-License-Identifier:    GPL-2.0
-
-Introduction
-============
-
-This is file system firmware loader for U-Boot framework, which has very close
-to some Linux Firmware API. For the details of Linux Firmware API, you can refer
-to https://01.org/linuxgraphics/gfx-docs/drm/driver-api/firmware/index.html.
-
-File system firmware loader can be used to load whatever(firmware, image,
-and binary) from the storage device in file system format into target location
-such as memory, then consumer driver such as FPGA driver can program FPGA image
-from the target location into FPGA.
-
-To enable firmware loader, CONFIG_FS_LOADER need to be set at
-<board_name>_defconfig such as "CONFIG_FS_LOADER=y".
-
-Firmware Loader API core features
----------------------------------
-
-Firmware storage device described in device tree source
--------------------------------------------------------
-	For passing data like storage device phandle and partition where the
-	firmware loading from to the firmware loader driver, those data could be
-	defined in fs-loader node as shown in below:
-
-	Example for block device:
-	fs_loader0: fs-loader {
-		u-boot,dm-pre-reloc;
-		compatible = "u-boot,fs-loader";
-		phandlepart = <&mmc 1>;
-	};
-
-	<&mmc 1> means block storage device pointer and its partition.
-
-	Above example is a description for block storage, but for UBI storage
-	device, it can be described in FDT as shown in below:
-
-	Example for ubi:
-	fs_loader1: fs-loader {
-		u-boot,dm-pre-reloc;
-		compatible = "u-boot,fs-loader";
-		mtdpart = "UBI",
-		ubivol = "ubi0";
-	};
-
-	Then, firmware-loader property can be added with any device node, which
-	driver would use the firmware loader for loading.
-
-	The value of the firmware-loader property should be set with phandle
-	of the fs-loader node.
-	For example:
-		firmware-loader = <&fs_loader0>;
-
-	If there are majority of devices using the same fs-loader node, then
-	firmware-loader property can be added under /chosen node instead of
-	adding to each of device node.
-
-	For example:
-	/{
-		chosen {
-			firmware-loader = <&fs_loader0>;
-		};
-	};
-
-	In each respective driver of devices using firmware loader, the firmware
-	loaded instance	should be created by DT phandle.
-
-	For example of getting DT phandle from /chosen and creating instance:
-	chosen_node = ofnode_path("/chosen");
-	if (!ofnode_valid(chosen_node)) {
-		debug("/chosen node was not found.\n");
-		return -ENOENT;
-	}
-
-	phandle_p = ofnode_get_property(chosen_node, "firmware-loader", &size);
-	if (!phandle_p) {
-		debug("firmware-loader property was not found.\n");
-		return -ENOENT;
-	}
-
-	phandle = fdt32_to_cpu(*phandle_p);
-	ret = uclass_get_device_by_phandle_id(UCLASS_FS_FIRMWARE_LOADER,
-					     phandle, &dev);
-	if (ret)
-		return ret;
-
-	Firmware loader driver is also designed to support U-boot environment
-	variables, so all these data from FDT can be overwritten
-	through the U-boot environment variable during run time.
-	For examples:
-	"storage_interface" - Storage interface, it can be "mmc", "usb", "sata"
-						  or "ubi".
-	"fw_dev_part" - Block device number and its partition, it can be "0:1".
-	"fw_ubi_mtdpart" - UBI device mtd partition, it can be "UBI".
-	"fw_ubi_volume" - UBI volume, it can be "ubi0".
-
-	When above environment variables are set, environment values would be
-	used instead of data from FDT.
-	The benefit of this design allows user to change storage attribute data
-	at run time through U-boot console and saving the setting as default
-	environment values in the storage for the next power cycle, so no
-	compilation is required for both driver and FDT.
-
-File system firmware Loader API
--------------------------------
-
-int request_firmware_into_buf(struct udevice *dev,
-				 const char *name,
-				 void *buf, size_t size, u32 offset)
---------------------------------------------------------------------
-Load firmware into a previously allocated buffer
-
-Parameters:
-
-1. struct udevice *dev
-	An instance of a driver
-
-2. const char *name
-	name of firmware file
-
-3. void *buf
-	address of buffer to load firmware into
-
-4. size_t size
-	size of buffer
-
-5. u32 offset
-	offset of a file for start reading into buffer
-
-return:
-	size of total read
-	-ve when error
-
-Description:
-	The firmware is loaded directly into the buffer pointed to by buf
-
-Example of calling request_firmware_into_buf API after creating firmware loader
-instance:
-	ret = uclass_get_device_by_phandle_id(UCLASS_FS_FIRMWARE_LOADER,
-					     phandle, &dev);
-	if (ret)
-		return ret;
-
-	request_firmware_into_buf(dev, filename, buffer_location, buffer_size,
-				 offset_ofreading);