1 // SPDX-License-Identifier: GPL-2.0+
13  * spl_node_to_boot_device() - maps from a DT-node to a SPL boot device
14  * @node:	of_offset of the node
17  * sources.  These may take on a device-specific meaning, depending on
18  * what nodes are enabled in a DTS (e.g. BOOT_DEVICE_MMC1 may refer to
19  * different controllers/block-devices, depending on which SD/MMC controllers
20  * are enabled in any given DTS).  This function maps from a DT-node back
24  *   -ENOENT, if no device matching the node could be found
25  *   -ENOSYS, if the device matching the node can not be mapped onto a
27  *   -1, for unspecified failures
31 static int spl_node_to_boot_device(int node)  in spl_node_to_boot_device()  argument
37 	 * aware of the block-device layer.  Until then (and to avoid unneeded  in spl_node_to_boot_device()
38 	 * delays in getting this feature out, it lives at the board-level).  in spl_node_to_boot_device()
40 	if (!uclass_get_device_by_of_offset(UCLASS_MMC, node, &parent)) {  in spl_node_to_boot_device()
54 			return -ENOENT;  in spl_node_to_boot_device()
56 		switch (desc->devnum) {  in spl_node_to_boot_device()
62 			return -ENOSYS;  in spl_node_to_boot_device()
64 	} else if (!uclass_get_device_by_of_offset(UCLASS_SPI_FLASH, node,  in spl_node_to_boot_device()
75 	if (!uclass_get_device_by_of_offset(UCLASS_SPI_FLASH, node, &parent))  in spl_node_to_boot_device()
78 	return -1;  in spl_node_to_boot_device()
82  * board_spl_was_booted_from() - retrieves the of-path the SPL was loaded from
84  * To support a 'same-as-spl' specification in the search-order for the next
85  * stage, we need a SoC- or board-specific way to handshake with what 'came
95 	debug("%s: no support for 'same-as-spl' for this board\n", __func__);  in board_spl_was_booted_from()
101 	const void *blob = gd->fdt_blob;  in board_boot_order()
106 	int node;  in board_boot_order()  local
118 					"u-boot,spl-boot-order", elem, NULL));  in board_boot_order()
123 		if (strncmp(conf, "same-as-spl", 11) == 0) {  in board_boot_order()
135 		node = fdt_path_offset(blob, conf);  in board_boot_order()
136 		if (node < 0) {  in board_boot_order()
142 		boot_device = spl_node_to_boot_device(node);  in board_boot_order()
144 			debug("%s: could not map node @%x to a boot-device\n",  in board_boot_order()
145 			      __func__, node);  in board_boot_order()