/* * 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 %pOF\n", node); continue; } err = of_address_to_resource(node, 0, res); if (err) { printk(KERN_ERR "OF RTC: Error " "translating resources for %pOF\n", node); continue; } printk(KERN_INFO "OF_RTC: %pOF is a %s @ 0x%llx-0x%llx\n", node, plat_name, (unsigned long long)res->start, (unsigned long long)res->end); platform_device_register_simple(plat_name, -1, res, 1); } } }