| /* |
| * 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); |
| } |
| } |
| } |
