Commit | Line | Data |
---|---|---|
de2cf332 | 1 | /* rtc-starfire.c: Starfire platform RTC driver. |
683cec8a PG |
2 | * |
3 | * Author: David S. Miller | |
4 | * License: GPL | |
de2cf332 DM |
5 | * |
6 | * Copyright (C) 2008 David S. Miller <davem@davemloft.net> | |
7 | */ | |
8 | ||
9 | #include <linux/kernel.h> | |
de2cf332 | 10 | #include <linux/init.h> |
de2cf332 DM |
11 | #include <linux/rtc.h> |
12 | #include <linux/platform_device.h> | |
13 | ||
14 | #include <asm/oplib.h> | |
15 | ||
de2cf332 DM |
16 | static u32 starfire_get_time(void) |
17 | { | |
18 | static char obp_gettod[32]; | |
19 | static u32 unix_tod; | |
20 | ||
21 | sprintf(obp_gettod, "h# %08x unix-gettod", | |
22 | (unsigned int) (long) &unix_tod); | |
23 | prom_feval(obp_gettod); | |
24 | ||
25 | return unix_tod; | |
26 | } | |
27 | ||
28 | static int starfire_read_time(struct device *dev, struct rtc_time *tm) | |
29 | { | |
326bce07 | 30 | rtc_time64_to_tm(starfire_get_time(), tm); |
ab62670e | 31 | return 0; |
de2cf332 DM |
32 | } |
33 | ||
34 | static const struct rtc_class_ops starfire_rtc_ops = { | |
35 | .read_time = starfire_read_time, | |
de2cf332 DM |
36 | }; |
37 | ||
be1ffce3 | 38 | static int __init starfire_rtc_probe(struct platform_device *pdev) |
de2cf332 | 39 | { |
45e39861 JH |
40 | struct rtc_device *rtc; |
41 | ||
166b1332 | 42 | rtc = devm_rtc_allocate_device(&pdev->dev); |
be1ffce3 AZ |
43 | if (IS_ERR(rtc)) |
44 | return PTR_ERR(rtc); | |
de2cf332 | 45 | |
166b1332 AB |
46 | rtc->ops = &starfire_rtc_ops; |
47 | rtc->range_max = U32_MAX; | |
48 | ||
be1ffce3 | 49 | platform_set_drvdata(pdev, rtc); |
de2cf332 | 50 | |
fdcfd854 | 51 | return devm_rtc_register_device(rtc); |
de2cf332 DM |
52 | } |
53 | ||
de2cf332 DM |
54 | static struct platform_driver starfire_rtc_driver = { |
55 | .driver = { | |
56 | .name = "rtc-starfire", | |
de2cf332 | 57 | }, |
de2cf332 DM |
58 | }; |
59 | ||
683cec8a | 60 | builtin_platform_driver_probe(starfire_rtc_driver, starfire_rtc_probe); |