Commit | Line | Data |
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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
22258fa4 DG |
2 | /* |
3 | * Instantiate mmio-mapped RTC chips based on device tree information | |
4 | * | |
5 | * Copyright 2007 David Gibson <dwg@au1.ibm.com>, IBM Corporation. | |
22258fa4 DG |
6 | */ |
7 | #include <linux/kernel.h> | |
8 | #include <linux/of.h> | |
9 | #include <linux/init.h> | |
26a2056e | 10 | #include <linux/of_address.h> |
22258fa4 | 11 | #include <linux/of_platform.h> |
5a0e3ad6 | 12 | #include <linux/slab.h> |
22258fa4 | 13 | |
4d5c5bad CL |
14 | #include <asm/prom.h> |
15 | ||
22258fa4 DG |
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 " | |
b7c670d6 RH |
39 | "allocating resource structure for %pOF\n", |
40 | node); | |
22258fa4 DG |
41 | continue; |
42 | } | |
43 | ||
44 | err = of_address_to_resource(node, 0, res); | |
45 | if (err) { | |
46 | printk(KERN_ERR "OF RTC: Error " | |
b7c670d6 RH |
47 | "translating resources for %pOF\n", |
48 | node); | |
22258fa4 DG |
49 | continue; |
50 | } | |
51 | ||
b7c670d6 RH |
52 | printk(KERN_INFO "OF_RTC: %pOF is a %s @ 0x%llx-0x%llx\n", |
53 | node, plat_name, | |
22258fa4 DG |
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 | } |