/* * Instantiate mmio-mapped RTC chips based on device tree information * * Copyright 2007 David Gibson <dwg@au1.ibm.com>, 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/kernel.h>#include <linux/of.h>#include <linux/init.h>#include <linux/of_address.h>#include <linux/of_platform.h>#include <linux/slab.h> static __initdata struct {	const char *compatible;	char *plat_name;} of_rtc_table[] = {	{ "ds1743-nvram", "rtc-ds1742" },}; void __init of_instantiate_rtc(void){	struct device_node *node;	int err;	int i; 	for (i = 0; i < ARRAY_SIZE(of_rtc_table); i++) {		char *plat_name = of_rtc_table[i].plat_name; 		for_each_compatible_node(node, NULL,					 of_rtc_table[i].compatible) {			struct resource *res; 			res = kmalloc(sizeof(*res), GFP_KERNEL);			if (!res) {				printk(KERN_ERR "OF RTC: Out of memory "				       "allocating resource structure for %s\n",				       node->full_name);				continue;			} 			err = of_address_to_resource(node, 0, res);			if (err) {				printk(KERN_ERR "OF RTC: Error "				       "translating resources for %s\n",				       node->full_name);				continue;			} 			printk(KERN_INFO "OF_RTC: %s is a %s @ 0x%llx-0x%llx\n",			       node->full_name, plat_name,			       (unsigned long long)res->start,			       (unsigned long long)res->end);			platform_device_register_simple(plat_name, -1, res, 1);		}	}}