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3afe6d04 GU |
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 | ||
64232fc3 AB |
12 | #if defined(CONFIG_M68K) || defined(CONFIG_PARISC) || \ |
13 | defined(CONFIG_PPC) || defined(CONFIG_SUPERH32) | |
3afe6d04 GU |
14 | #include <asm/rtc.h> |
15 | ||
16 | static int generic_get_time(struct device *dev, struct rtc_time *tm) | |
17 | { | |
18 | unsigned int ret = get_rtc_time(tm); | |
19 | ||
20 | if (ret & RTC_BATT_BAD) | |
21 | return -EOPNOTSUPP; | |
22 | ||
23 | return rtc_valid_tm(tm); | |
24 | } | |
25 | ||
26 | static int generic_set_time(struct device *dev, struct rtc_time *tm) | |
27 | { | |
28 | if (set_rtc_time(tm) < 0) | |
29 | return -EOPNOTSUPP; | |
30 | ||
31 | return 0; | |
32 | } | |
33 | ||
34 | static const struct rtc_class_ops generic_rtc_ops = { | |
35 | .read_time = generic_get_time, | |
36 | .set_time = generic_set_time, | |
37 | }; | |
64232fc3 AB |
38 | #else |
39 | #define generic_rtc_ops *(struct rtc_class_ops*)NULL | |
40 | #endif | |
3afe6d04 GU |
41 | |
42 | static int __init generic_rtc_probe(struct platform_device *dev) | |
43 | { | |
44 | struct rtc_device *rtc; | |
64232fc3 AB |
45 | const struct rtc_class_ops *ops; |
46 | ||
47 | ops = dev_get_platdata(&dev->dev); | |
48 | if (!ops) | |
49 | ops = &generic_rtc_ops; | |
3afe6d04 | 50 | |
360fe134 | 51 | rtc = devm_rtc_device_register(&dev->dev, "rtc-generic", |
64232fc3 | 52 | ops, THIS_MODULE); |
3afe6d04 GU |
53 | if (IS_ERR(rtc)) |
54 | return PTR_ERR(rtc); | |
55 | ||
56 | platform_set_drvdata(dev, rtc); | |
57 | ||
58 | return 0; | |
59 | } | |
60 | ||
3afe6d04 GU |
61 | static struct platform_driver generic_rtc_driver = { |
62 | .driver = { | |
63 | .name = "rtc-generic", | |
3afe6d04 | 64 | }, |
3afe6d04 GU |
65 | }; |
66 | ||
a53f9a4e | 67 | module_platform_driver_probe(generic_rtc_driver, generic_rtc_probe); |
3afe6d04 GU |
68 | |
69 | MODULE_AUTHOR("Kyle McMartin <kyle@mcmartin.ca>"); | |
70 | MODULE_LICENSE("GPL"); | |
71 | MODULE_DESCRIPTION("Generic RTC driver"); | |
72 | MODULE_ALIAS("platform:rtc-generic"); |