xref: /openbmc/u-boot/drivers/core/of_extra.c (revision ae485b54)
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright (c) 2017 Google, Inc
4  * Written by Simon Glass <sjg@chromium.org>
5  */
6 
7 #include <common.h>
8 #include <linux/libfdt.h>
9 #include <dm/of_access.h>
10 #include <dm/of_extra.h>
11 #include <dm/ofnode.h>
12 
13 int of_read_fmap_entry(ofnode node, const char *name,
14 		       struct fmap_entry *entry)
15 {
16 	const char *prop;
17 	u32 reg[2];
18 
19 	if (ofnode_read_u32_array(node, "reg", reg, 2)) {
20 		debug("Node '%s' has bad/missing 'reg' property\n", name);
21 		return -FDT_ERR_NOTFOUND;
22 	}
23 	entry->offset = reg[0];
24 	entry->length = reg[1];
25 	entry->used = ofnode_read_s32_default(node, "used", entry->length);
26 	prop = ofnode_read_string(node, "compress");
27 	entry->compress_algo = prop && !strcmp(prop, "lzo") ?
28 		FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE;
29 	prop = ofnode_read_string(node, "hash");
30 	if (prop)
31 		entry->hash_size = strlen(prop);
32 	entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE;
33 	entry->hash = (uint8_t *)prop;
34 
35 	return 0;
36 }
37