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