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65 lines
1.3 KiB
C
65 lines
1.3 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2021 Rafał Miłecki <rafal@milecki.pl>
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/of.h>
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#include <linux/mtd/mtd.h>
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#include <linux/slab.h>
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#include <linux/mtd/partitions.h>
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#include "ofpart_bcm4908.h"
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#define BLPARAMS_FW_OFFSET "NAND_RFS_OFS"
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static long long bcm4908_partitions_fw_offset(void)
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{
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struct device_node *root;
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struct property *prop;
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const char *s;
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root = of_find_node_by_path("/");
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if (!root)
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return -ENOENT;
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of_property_for_each_string(root, "brcm_blparms", prop, s) {
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size_t len = strlen(BLPARAMS_FW_OFFSET);
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unsigned long offset;
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int err;
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if (strncmp(s, BLPARAMS_FW_OFFSET, len) || s[len] != '=')
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continue;
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err = kstrtoul(s + len + 1, 0, &offset);
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if (err) {
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pr_err("failed to parse %s\n", s + len + 1);
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return err;
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}
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return offset << 10;
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}
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return -ENOENT;
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}
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int bcm4908_partitions_post_parse(struct mtd_info *mtd, struct mtd_partition *parts, int nr_parts)
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{
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long long fw_offset;
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int i;
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fw_offset = bcm4908_partitions_fw_offset();
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for (i = 0; i < nr_parts; i++) {
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if (of_device_is_compatible(parts[i].of_node, "brcm,bcm4908-firmware")) {
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if (fw_offset < 0 || parts[i].offset == fw_offset)
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parts[i].name = "firmware";
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else
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parts[i].name = "backup";
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}
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}
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return 0;
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}
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