projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 22258fa4 DG |
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> | |
| 5a0e3ad6 | 15 | #include <linux/slab.h> |
| 22258fa4 DG |
16 | |
| 17 | static __initdata struct { | |
| 18 | const char *compatible; | |
| 19 | char *plat_name; | |
| 20 | } of_rtc_table[] = { | |
| 21 | { "ds1743-nvram", "rtc-ds1742" }, | |
| 22 | }; | |
| 23 | ||
| 24 | void __init of_instantiate_rtc(void) | |
| 25 | { | |
| 26 | struct device_node *node; | |
| 27 | int err; | |
| 28 | int i; | |
| 29 | ||
| 30 | for (i = 0; i < ARRAY_SIZE(of_rtc_table); i++) { | |
| 31 | char *plat_name = of_rtc_table[i].plat_name; | |
| 32 | ||
| 33 | for_each_compatible_node(node, NULL, | |
| 34 | of_rtc_table[i].compatible) { | |
| 35 | struct resource *res; | |
| 36 | ||
| 37 | res = kmalloc(sizeof(*res), GFP_KERNEL); | |
| 38 | if (!res) { | |
| 39 | printk(KERN_ERR "OF RTC: Out of memory " | |
| 40 | "allocating resource structure for %s\n", | |
| 41 | node->full_name); | |
| 42 | continue; | |
| 43 | } | |
| 44 | ||
| 45 | err = of_address_to_resource(node, 0, res); | |
| 46 | if (err) { | |
| 47 | printk(KERN_ERR "OF RTC: Error " | |
| 48 | "translating resources for %s\n", | |
| 49 | node->full_name); | |
| 50 | continue; | |
| 51 | } | |
| 52 | ||
| 53 | printk(KERN_INFO "OF_RTC: %s is a %s @ 0x%llx-0x%llx\n", | |
| 54 | node->full_name, plat_name, | |
| 55 | (unsigned long long)res->start, | |
| 56 | (unsigned long long)res->end); | |
| 57 | platform_device_register_simple(plat_name, -1, res, 1); | |
| 58 | } | |
| 59 | } | |
| 60 | } |