blob: 98322004ad2e48eedb901038eef0f51663c92b67 [file] [log] [blame]
Geert Uytterhoeven3afe6d02009-02-19 16:46:49 +01001/* rtc-generic: RTC driver using the generic RTC abstraction
2 *
3 * Copyright (C) 2008 Kyle McMartin <kyle@mcmartin.ca>
4 */
5
6#include <linux/kernel.h>
7#include <linux/module.h>
8#include <linux/time.h>
9#include <linux/platform_device.h>
10#include <linux/rtc.h>
11
12#include <asm/rtc.h>
13
14static int generic_get_time(struct device *dev, struct rtc_time *tm)
15{
16 unsigned int ret = get_rtc_time(tm);
17
18 if (ret & RTC_BATT_BAD)
19 return -EOPNOTSUPP;
20
21 return rtc_valid_tm(tm);
22}
23
24static int generic_set_time(struct device *dev, struct rtc_time *tm)
25{
26 if (set_rtc_time(tm) < 0)
27 return -EOPNOTSUPP;
28
29 return 0;
30}
31
32static const struct rtc_class_ops generic_rtc_ops = {
33 .read_time = generic_get_time,
34 .set_time = generic_set_time,
35};
36
37static int __init generic_rtc_probe(struct platform_device *dev)
38{
39 struct rtc_device *rtc;
40
41 rtc = rtc_device_register("rtc-generic", &dev->dev, &generic_rtc_ops,
42 THIS_MODULE);
43 if (IS_ERR(rtc))
44 return PTR_ERR(rtc);
45
46 platform_set_drvdata(dev, rtc);
47
48 return 0;
49}
50
51static int __exit generic_rtc_remove(struct platform_device *dev)
52{
53 struct rtc_device *rtc = platform_get_drvdata(dev);
54
55 rtc_device_unregister(rtc);
56
57 return 0;
58}
59
60static struct platform_driver generic_rtc_driver = {
61 .driver = {
62 .name = "rtc-generic",
63 .owner = THIS_MODULE,
64 },
65 .remove = __exit_p(generic_rtc_remove),
66};
67
68static int __init generic_rtc_init(void)
69{
70 return platform_driver_probe(&generic_rtc_driver, generic_rtc_probe);
71}
72
73static void __exit generic_rtc_fini(void)
74{
75 platform_driver_unregister(&generic_rtc_driver);
76}
77
78module_init(generic_rtc_init);
79module_exit(generic_rtc_fini);
80
81MODULE_AUTHOR("Kyle McMartin <kyle@mcmartin.ca>");
82MODULE_LICENSE("GPL");
83MODULE_DESCRIPTION("Generic RTC driver");
84MODULE_ALIAS("platform:rtc-generic");