Merge branch 'pm-cpuidle'
[linux-2.6-block.git] / drivers / rtc / rtc-generic.c
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1/* 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
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41 rtc = devm_rtc_device_register(&dev->dev, "rtc-generic",
42 &generic_rtc_ops, THIS_MODULE);
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43 if (IS_ERR(rtc))
44 return PTR_ERR(rtc);
45
46 platform_set_drvdata(dev, rtc);
47
48 return 0;
49}
50
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51static struct platform_driver generic_rtc_driver = {
52 .driver = {
53 .name = "rtc-generic",
3afe6d04 54 },
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55};
56
a53f9a4e 57module_platform_driver_probe(generic_rtc_driver, generic_rtc_probe);
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58
59MODULE_AUTHOR("Kyle McMartin <kyle@mcmartin.ca>");
60MODULE_LICENSE("GPL");
61MODULE_DESCRIPTION("Generic RTC driver");
62MODULE_ALIAS("platform:rtc-generic");