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9eb16864 KM |
1 | /* rtc-parisc: RTC for HP PA-RISC firmware |
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> | |
93d456d9 | 10 | #include <linux/rtc.h> |
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11 | |
12 | #include <asm/rtc.h> | |
13 | ||
9eb16864 KM |
14 | static int parisc_get_time(struct device *dev, struct rtc_time *tm) |
15 | { | |
55457161 | 16 | unsigned int ret = get_rtc_time(tm); |
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17 | |
18 | if (ret & RTC_BATT_BAD) | |
19 | return -EOPNOTSUPP; | |
20 | ||
f62bacd4 | 21 | return rtc_valid_tm(tm); |
9eb16864 KM |
22 | } |
23 | ||
24 | static int parisc_set_time(struct device *dev, struct rtc_time *tm) | |
25 | { | |
a8c20cd3 | 26 | if (set_rtc_time(tm) < 0) |
9eb16864 KM |
27 | return -EOPNOTSUPP; |
28 | ||
29 | return 0; | |
30 | } | |
31 | ||
32 | static const struct rtc_class_ops parisc_rtc_ops = { | |
33 | .read_time = parisc_get_time, | |
34 | .set_time = parisc_set_time, | |
35 | }; | |
36 | ||
2b93cff4 | 37 | static int __init parisc_rtc_probe(struct platform_device *dev) |
9eb16864 | 38 | { |
b250c96e | 39 | struct rtc_device *rtc; |
9eb16864 | 40 | |
b250c96e | 41 | rtc = rtc_device_register("rtc-parisc", &dev->dev, &parisc_rtc_ops, |
42 | THIS_MODULE); | |
43 | if (IS_ERR(rtc)) | |
44 | return PTR_ERR(rtc); | |
9eb16864 | 45 | |
b250c96e | 46 | platform_set_drvdata(dev, rtc); |
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47 | |
48 | return 0; | |
49 | } | |
50 | ||
2b93cff4 | 51 | static int __exit parisc_rtc_remove(struct platform_device *dev) |
9eb16864 | 52 | { |
b250c96e | 53 | struct rtc_device *rtc = platform_get_drvdata(dev); |
9eb16864 | 54 | |
b250c96e | 55 | rtc_device_unregister(rtc); |
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56 | |
57 | return 0; | |
58 | } | |
59 | ||
60 | static struct platform_driver parisc_rtc_driver = { | |
61 | .driver = { | |
62 | .name = "rtc-parisc", | |
63 | .owner = THIS_MODULE, | |
64 | }, | |
65 | .probe = parisc_rtc_probe, | |
66 | .remove = __devexit_p(parisc_rtc_remove), | |
67 | }; | |
68 | ||
69 | static int __init parisc_rtc_init(void) | |
70 | { | |
2b93cff4 | 71 | return platform_driver_probe(&parisc_rtc_driver, parisc_rtc_probe); |
9eb16864 KM |
72 | } |
73 | ||
74 | static void __exit parisc_rtc_fini(void) | |
75 | { | |
76 | platform_driver_unregister(&parisc_rtc_driver); | |
77 | } | |
78 | ||
79 | module_init(parisc_rtc_init); | |
80 | module_exit(parisc_rtc_fini); | |
81 | ||
82 | MODULE_AUTHOR("Kyle McMartin <kyle@mcmartin.ca>"); | |
83 | MODULE_LICENSE("GPL"); | |
84 | MODULE_DESCRIPTION("HP PA-RISC RTC driver"); |