/* * Flash partitions described by the OF (or flattened) device tree * * Copyright (C) 2006 MontaVista Software Inc. * Author: Vitaly Wool <vwool@ru.mvista.com> * * Revised to handle newer style flash binding by: * Copyright (C) 2007 David Gibson, IBM Corporation. * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. */ #include <linux/module.h> #include <linux/init.h> #include <linux/of.h> #include <linux/mtd/mtd.h> #include <linux/mtd/partitions.h> int __devinit of_mtd_parse_partitions(struct device *dev, struct device_node *node, struct mtd_partition **pparts) { const char *partname; struct device_node *pp; int nr_parts, i; /* First count the subnodes */ pp = NULL; nr_parts = 0; while ((pp = of_get_next_child(node, pp))) nr_parts++; if (nr_parts == 0) return 0; *pparts = kzalloc(nr_parts * sizeof(**pparts), GFP_KERNEL); if (!*pparts) return -ENOMEM; pp = NULL; i = 0; while ((pp = of_get_next_child(node, pp))) { const u32 *reg; int len; /* check if this is a partition node */ partname = of_get_property(pp, "name", &len); if (strcmp(partname, "partition") != 0) { nr_parts--; continue; } reg = of_get_property(pp, "reg", &len); if (!reg || (len != 2 * sizeof(u32))) { of_node_put(pp); dev_err(dev, "Invalid 'reg' on %s\n", node->full_name); kfree(*pparts); *pparts = NULL; return -EINVAL; } (*pparts)[i].offset = reg[0]; (*pparts)[i].size = reg[1]; partname = of_get_property(pp, "label", &len); if (!partname) partname = of_get_property(pp, "name", &len); (*pparts)[i].name = (char *)partname; if (of_get_property(pp, "read-only", &len)) (*pparts)[i].mask_flags = MTD_WRITEABLE; i++; } return nr_parts; } EXPORT_SYMBOL(of_mtd_parse_partitions); MODULE_LICENSE("GPL");