1 files changed, 67 insertions, 0 deletions
diff --git a/drivers/mtd/parsers/ofpart_bcm4908.c b/drivers/mtd/parsers/ofpart_bcm4908.c
new file mode 100644
index 000000000..bb072a094
--- /dev/null
+++ b/drivers/mtd/parsers/ofpart_bcm4908.c
@@ -0,0 +1,67 @@
+// 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;
+}