projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 3afe6d04 GU |
1 | /* rtc-generic: RTC driver using the generic RTC abstraction |
| 2 | * | |
| 3 | * Copyright (C) 2008 Kyle McMartin <[email protected]> | |
| 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 | ||
| 12 | #include <asm/rtc.h> | |
| 13 | ||
| 14 | static int generic_get_time(struct device *dev, struct rtc_time *tm) | |
| 15 | { | |
| 16 | unsigned int ret = get_rtc_time(tm); | |
| 17 | ||
| 18 | if (ret & RTC_BATT_BAD) | |
| 19 | return -EOPNOTSUPP; | |
| 20 | ||
| 21 | return rtc_valid_tm(tm); | |
| 22 | } | |
| 23 | ||
| 24 | static int generic_set_time(struct device *dev, struct rtc_time *tm) | |
| 25 | { | |
| 26 | if (set_rtc_time(tm) < 0) | |
| 27 | return -EOPNOTSUPP; | |
| 28 | ||
| 29 | return 0; | |
| 30 | } | |
| 31 | ||
| 32 | static const struct rtc_class_ops generic_rtc_ops = { | |
| 33 | .read_time = generic_get_time, | |
| 34 | .set_time = generic_set_time, | |
| 35 | }; | |
| 36 | ||
| 37 | static int __init generic_rtc_probe(struct platform_device *dev) | |
| 38 | { | |
| 39 | struct rtc_device *rtc; | |
| 40 | ||
| 41 | rtc = rtc_device_register("rtc-generic", &dev->dev, &generic_rtc_ops, | |
| 42 | THIS_MODULE); | |
| 43 | if (IS_ERR(rtc)) | |
| 44 | return PTR_ERR(rtc); | |
| 45 | ||
| 46 | platform_set_drvdata(dev, rtc); | |
| 47 | ||
| 48 | return 0; | |
| 49 | } | |
| 50 | ||
| 51 | static int __exit generic_rtc_remove(struct platform_device *dev) | |
| 52 | { | |
| 53 | struct rtc_device *rtc = platform_get_drvdata(dev); | |
| 54 | ||
| 55 | rtc_device_unregister(rtc); | |
| 56 | ||
| 57 | return 0; | |
| 58 | } | |
| 59 | ||
| 60 | static struct platform_driver generic_rtc_driver = { | |
| 61 | .driver = { | |
| 62 | .name = "rtc-generic", | |
| 63 | .owner = THIS_MODULE, | |
| 64 | }, | |
| 65 | .remove = __exit_p(generic_rtc_remove), | |
| 66 | }; | |
| 67 | ||
| 68 | static int __init generic_rtc_init(void) | |
| 69 | { | |
| 70 | return platform_driver_probe(&generic_rtc_driver, generic_rtc_probe); | |
| 71 | } | |
| 72 | ||
| 73 | static void __exit generic_rtc_fini(void) | |
| 74 | { | |
| 75 | platform_driver_unregister(&generic_rtc_driver); | |
| 76 | } | |
| 77 | ||
| 78 | module_init(generic_rtc_init); | |
| 79 | module_exit(generic_rtc_fini); | |
| 80 | ||
| 81 | MODULE_AUTHOR("Kyle McMartin <[email protected]>"); | |
| 82 | MODULE_LICENSE("GPL"); | |
| 83 | MODULE_DESCRIPTION("Generic RTC driver"); | |
| 84 | MODULE_ALIAS("platform:rtc-generic"); |