4  * SPDX-License-Identifier:     GPL-2.0+
22  * spl_node_to_boot_device() - maps from a DT-node to a SPL boot device
23  * @node:	of_offset of the node
26  * sources.  These may take on a device-specific meaning, depending on
27  * what nodes are enabled in a DTS (e.g. BOOT_DEVICE_MMC1 may refer to
28  * different controllers/block-devices, depending on which SD/MMC controllers
29  * are enabled in any given DTS).  This function maps from a DT-node back
33  *   -ENOENT, if no device matching the node could be found
34  *   -ENOSYS, if the device matching the node can not be mapped onto a
36  *   -1, for unspecified failures
39 static int spl_node_to_boot_device(int node)  in spl_node_to_boot_device()  argument
45 	 * aware of the block-device layer.  Until then (and to avoid unneeded  in spl_node_to_boot_device()
46 	 * delays in getting this feature out, it lives at the board-level).  in spl_node_to_boot_device()
48 	if (!uclass_get_device_by_of_offset(UCLASS_MMC, node, &parent)) {  in spl_node_to_boot_device()
62 			return -ENOENT;  in spl_node_to_boot_device()
64 		switch (desc->devnum) {  in spl_node_to_boot_device()
70 			return -ENOSYS;  in spl_node_to_boot_device()
80 	if (!uclass_get_device_by_of_offset(UCLASS_SPI_FLASH, node, &parent))  in spl_node_to_boot_device()
86 	if (!uclass_get_device_by_of_offset(UCLASS_MTD, node, &parent)) {  in spl_node_to_boot_device()
100 			return -ENOENT;  in spl_node_to_boot_device()
102 		switch (desc->devnum) {  in spl_node_to_boot_device()
108 			return -ENOSYS;  in spl_node_to_boot_device()
115 	 * aware of the block-device layer.  Until then (and to avoid unneeded  in spl_node_to_boot_device()
116 	 * delays in getting this feature out, it lives at the board-level).  in spl_node_to_boot_device()
118 	if (!uclass_get_device_by_of_offset(UCLASS_RKNAND, node, &parent))  in spl_node_to_boot_device()
121 	return -1;  in spl_node_to_boot_device()
125  * board_spl_was_booted_from() - retrieves the of-path the SPL was loaded from
127  * To support a 'same-as-spl' specification in the search-order for the next
128  * stage, we need a SoC- or board-specific way to handshake with what 'came
138 	debug("%s: no support for 'same-as-spl' for this board\n", __func__);  in board_spl_was_booted_from()
144 	const void *blob = gd->fdt_blob;  in board_boot_order()
149 	int node;  in board_boot_order()  local
161 					"u-boot,spl-boot-order", elem, NULL));  in board_boot_order()
166 		if (strncmp(conf, "same-as-spl", 11) == 0) {  in board_boot_order()
178 		node = fdt_path_offset(blob, conf);  in board_boot_order()
179 		if (node < 0) {  in board_boot_order()
185 		boot_device = spl_node_to_boot_device(node);  in board_boot_order()
187 			debug("%s: could not map node @%x to a boot-device\n",  in board_boot_order()
188 			      __func__, node);  in board_boot_order()