Commit | Line | Data |
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de2cf332 DM |
1 | /* rtc-starfire.c: Starfire platform RTC driver. |
2 | * | |
3 | * Copyright (C) 2008 David S. Miller <davem@davemloft.net> | |
4 | */ | |
5 | ||
6 | #include <linux/kernel.h> | |
7 | #include <linux/module.h> | |
8 | #include <linux/init.h> | |
de2cf332 DM |
9 | #include <linux/rtc.h> |
10 | #include <linux/platform_device.h> | |
11 | ||
12 | #include <asm/oplib.h> | |
13 | ||
14 | MODULE_AUTHOR("David S. Miller <davem@davemloft.net>"); | |
15 | MODULE_DESCRIPTION("Starfire RTC driver"); | |
16 | MODULE_LICENSE("GPL"); | |
17 | ||
de2cf332 DM |
18 | static u32 starfire_get_time(void) |
19 | { | |
20 | static char obp_gettod[32]; | |
21 | static u32 unix_tod; | |
22 | ||
23 | sprintf(obp_gettod, "h# %08x unix-gettod", | |
24 | (unsigned int) (long) &unix_tod); | |
25 | prom_feval(obp_gettod); | |
26 | ||
27 | return unix_tod; | |
28 | } | |
29 | ||
30 | static int starfire_read_time(struct device *dev, struct rtc_time *tm) | |
31 | { | |
be1ffce3 AZ |
32 | rtc_time_to_tm(starfire_get_time(), tm); |
33 | return rtc_valid_tm(tm); | |
de2cf332 DM |
34 | } |
35 | ||
36 | static const struct rtc_class_ops starfire_rtc_ops = { | |
37 | .read_time = starfire_read_time, | |
de2cf332 DM |
38 | }; |
39 | ||
be1ffce3 | 40 | static int __init starfire_rtc_probe(struct platform_device *pdev) |
de2cf332 | 41 | { |
45e39861 JH |
42 | struct rtc_device *rtc; |
43 | ||
44 | rtc = devm_rtc_device_register(&pdev->dev, "starfire", | |
45 | &starfire_rtc_ops, THIS_MODULE); | |
be1ffce3 AZ |
46 | if (IS_ERR(rtc)) |
47 | return PTR_ERR(rtc); | |
de2cf332 | 48 | |
be1ffce3 | 49 | platform_set_drvdata(pdev, rtc); |
de2cf332 | 50 | |
de2cf332 DM |
51 | return 0; |
52 | } | |
53 | ||
de2cf332 DM |
54 | static struct platform_driver starfire_rtc_driver = { |
55 | .driver = { | |
56 | .name = "rtc-starfire", | |
de2cf332 | 57 | }, |
de2cf332 DM |
58 | }; |
59 | ||
67bef2d5 | 60 | module_platform_driver_probe(starfire_rtc_driver, starfire_rtc_probe); |