| David Gibson | 22258fa | 2008-01-11 14:25:34 +1100 | [diff] [blame] | 1 | /* |
| 2 | * Instantiate mmio-mapped RTC chips based on device tree information |
| 3 | * |
| 4 | * Copyright 2007 David Gibson <dwg@au1.ibm.com>, IBM Corporation. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms of the GNU General Public License as published by the |
| 8 | * Free Software Foundation; either version 2 of the License, or (at your |
| 9 | * option) any later version. |
| 10 | */ |
| 11 | #include <linux/kernel.h> |
| 12 | #include <linux/of.h> |
| 13 | #include <linux/init.h> |
| 14 | #include <linux/of_platform.h> |
| 15 | |
| 16 | static __initdata struct { |
| 17 | const char *compatible; |
| 18 | char *plat_name; |
| 19 | } of_rtc_table[] = { |
| 20 | { "ds1743-nvram", "rtc-ds1742" }, |
| 21 | }; |
| 22 | |
| 23 | void __init of_instantiate_rtc(void) |
| 24 | { |
| 25 | struct device_node *node; |
| 26 | int err; |
| 27 | int i; |
| 28 | |
| 29 | for (i = 0; i < ARRAY_SIZE(of_rtc_table); i++) { |
| 30 | char *plat_name = of_rtc_table[i].plat_name; |
| 31 | |
| 32 | for_each_compatible_node(node, NULL, |
| 33 | of_rtc_table[i].compatible) { |
| 34 | struct resource *res; |
| 35 | |
| 36 | res = kmalloc(sizeof(*res), GFP_KERNEL); |
| 37 | if (!res) { |
| 38 | printk(KERN_ERR "OF RTC: Out of memory " |
| 39 | "allocating resource structure for %s\n", |
| 40 | node->full_name); |
| 41 | continue; |
| 42 | } |
| 43 | |
| 44 | err = of_address_to_resource(node, 0, res); |
| 45 | if (err) { |
| 46 | printk(KERN_ERR "OF RTC: Error " |
| 47 | "translating resources for %s\n", |
| 48 | node->full_name); |
| 49 | continue; |
| 50 | } |
| 51 | |
| 52 | printk(KERN_INFO "OF_RTC: %s is a %s @ 0x%llx-0x%llx\n", |
| 53 | node->full_name, plat_name, |
| 54 | (unsigned long long)res->start, |
| 55 | (unsigned long long)res->end); |
| 56 | platform_device_register_simple(plat_name, -1, res, 1); |
| 57 | } |
| 58 | } |
| 59 | } |