Gitiles
Code Review Sign In
review.evervolv.com / android_kernel_htc_msm8960 / 2b93cff4dc184bf7b4858dc7a9bd2e8d33c1a3eb / . / drivers / rtc / rtc-parisc.c
blob: a2ca07ad42cba311ddf66163841c3a3d176a8146 [file] [log] [blame]
Kyle McMartin9eb16862008-09-10 14:24:07 +0000[diff] [blame]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>
dann frazier93d456d2009-03-31 15:24:49 -0700[diff] [blame]10#include <linux/rtc.h>
Kyle McMartin9eb16862008-09-10 14:24:07 +0000[diff] [blame]11
12#include <asm/rtc.h>
13
Kyle McMartin9eb16862008-09-10 14:24:07 +0000[diff] [blame]14static int parisc_get_time(struct device *dev, struct rtc_time *tm)
15{
dann frazier05439f12009-03-31 15:24:50 -0700[diff] [blame]16 unsigned long ret;
Kyle McMartin9eb16862008-09-10 14:24:07 +0000[diff] [blame]17
Kyle McMartin9eb16862008-09-10 14:24:07 +0000[diff] [blame]18 ret = get_rtc_time(tm);
Kyle McMartin9eb16862008-09-10 14:24:07 +0000[diff] [blame]19
20 if (ret & RTC_BATT_BAD)
21 return -EOPNOTSUPP;
22
dann frazierf62bacd2009-03-31 15:24:52 -0700[diff] [blame]23 return rtc_valid_tm(tm);
Kyle McMartin9eb16862008-09-10 14:24:07 +0000[diff] [blame]24}
25
26static int parisc_set_time(struct device *dev, struct rtc_time *tm)
27{
Roel Kluin022b7692008-12-03 04:16:04 +0000[diff] [blame]28 int ret;
Kyle McMartin9eb16862008-09-10 14:24:07 +0000[diff] [blame]29
Kyle McMartin9eb16862008-09-10 14:24:07 +0000[diff] [blame]30 ret = set_rtc_time(tm);
Kyle McMartin9eb16862008-09-10 14:24:07 +0000[diff] [blame]31
32 if (ret < 0)
33 return -EOPNOTSUPP;
34
35 return 0;
36}
37
38static const struct rtc_class_ops parisc_rtc_ops = {
39 .read_time = parisc_get_time,
40 .set_time = parisc_set_time,
41};
42
dann frazier2b93cff2009-03-31 15:24:52 -0700[diff] [blame^]43static int __init parisc_rtc_probe(struct platform_device *dev)
Kyle McMartin9eb16862008-09-10 14:24:07 +0000[diff] [blame]44{
dann frazier6b318f62009-03-31 15:24:51 -0700[diff] [blame]45 struct rtc_device *p;
Kyle McMartin9eb16862008-09-10 14:24:07 +0000[diff] [blame]46
dann frazier6b318f62009-03-31 15:24:51 -0700[diff] [blame]47 p = rtc_device_register("rtc-parisc", &dev->dev, &parisc_rtc_ops,
48 THIS_MODULE);
49 if (IS_ERR(p)) {
50 int err = PTR_ERR(p);
Kyle McMartin9eb16862008-09-10 14:24:07 +0000[diff] [blame]51 return err;
52 }
53
54 platform_set_drvdata(dev, p);
55
56 return 0;
57}
58
dann frazier2b93cff2009-03-31 15:24:52 -0700[diff] [blame^]59static int __exit parisc_rtc_remove(struct platform_device *dev)
Kyle McMartin9eb16862008-09-10 14:24:07 +0000[diff] [blame]60{
dann frazier6b318f62009-03-31 15:24:51 -0700[diff] [blame]61 struct rtc_device *p = platform_get_drvdata(dev);
Kyle McMartin9eb16862008-09-10 14:24:07 +0000[diff] [blame]62
dann frazier6b318f62009-03-31 15:24:51 -0700[diff] [blame]63 rtc_device_unregister(p);
Kyle McMartin9eb16862008-09-10 14:24:07 +0000[diff] [blame]64
65 return 0;
66}
67
68static struct platform_driver parisc_rtc_driver = {
69 .driver = {
70 .name = "rtc-parisc",
71 .owner = THIS_MODULE,
72 },
73 .probe = parisc_rtc_probe,
74 .remove = __devexit_p(parisc_rtc_remove),
75};
76
77static int __init parisc_rtc_init(void)
78{
dann frazier2b93cff2009-03-31 15:24:52 -0700[diff] [blame^]79 return platform_driver_probe(&parisc_rtc_driver, parisc_rtc_probe);
Kyle McMartin9eb16862008-09-10 14:24:07 +0000[diff] [blame]80}
81
82static void __exit parisc_rtc_fini(void)
83{
84 platform_driver_unregister(&parisc_rtc_driver);
85}
86
87module_init(parisc_rtc_init);
88module_exit(parisc_rtc_fini);
89
90MODULE_AUTHOR("Kyle McMartin <kyle@mcmartin.ca>");
91MODULE_LICENSE("GPL");
92MODULE_DESCRIPTION("HP PA-RISC RTC driver");