projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 3afe6d04 GU |
1 | /* rtc-generic: RTC driver using the generic RTC abstraction |
| 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> | |
| 10 | #include <linux/rtc.h> | |
| 11 | ||
| 64232fc3 AB |
12 | #if defined(CONFIG_M68K) || defined(CONFIG_PARISC) || \ |
| 13 | defined(CONFIG_PPC) || defined(CONFIG_SUPERH32) | |
| 3afe6d04 GU |
14 | #include <asm/rtc.h> |
| 15 | ||
| 16 | static int generic_get_time(struct device *dev, struct rtc_time *tm) | |
| 17 | { | |
| 18 | unsigned int ret = get_rtc_time(tm); | |
| 19 | ||
| 20 | if (ret & RTC_BATT_BAD) | |
| 21 | return -EOPNOTSUPP; | |
| 22 | ||
| 23 | return rtc_valid_tm(tm); | |
| 24 | } | |
| 25 | ||
| 26 | static int generic_set_time(struct device *dev, struct rtc_time *tm) | |
| 27 | { | |
| 28 | if (set_rtc_time(tm) < 0) | |
| 29 | return -EOPNOTSUPP; | |
| 30 | ||
| 31 | return 0; | |
| 32 | } | |
| 33 | ||
| 34 | static const struct rtc_class_ops generic_rtc_ops = { | |
| 35 | .read_time = generic_get_time, | |
| 36 | .set_time = generic_set_time, | |
| 37 | }; | |
| 64232fc3 AB |
38 | #else |
| 39 | #define generic_rtc_ops *(struct rtc_class_ops*)NULL | |
| 40 | #endif | |
| 3afe6d04 GU |
41 | |
| 42 | static int __init generic_rtc_probe(struct platform_device *dev) | |
| 43 | { | |
| 44 | struct rtc_device *rtc; | |
| 64232fc3 AB |
45 | const struct rtc_class_ops *ops; |
| 46 | ||
| 47 | ops = dev_get_platdata(&dev->dev); | |
| 48 | if (!ops) | |
| 49 | ops = &generic_rtc_ops; | |
| 3afe6d04 | 50 | |
| 360fe134 | 51 | rtc = devm_rtc_device_register(&dev->dev, "rtc-generic", |
| 64232fc3 | 52 | ops, THIS_MODULE); |
| 3afe6d04 GU |
53 | if (IS_ERR(rtc)) |
| 54 | return PTR_ERR(rtc); | |
| 55 | ||
| 56 | platform_set_drvdata(dev, rtc); | |
| 57 | ||
| 58 | return 0; | |
| 59 | } | |
| 60 | ||
| 3afe6d04 GU |
61 | static struct platform_driver generic_rtc_driver = { |
| 62 | .driver = { | |
| 63 | .name = "rtc-generic", | |
| 3afe6d04 | 64 | }, |
| 3afe6d04 GU |
65 | }; |
| 66 | ||
| a53f9a4e | 67 | module_platform_driver_probe(generic_rtc_driver, generic_rtc_probe); |
| 3afe6d04 GU |
68 | |
| 69 | MODULE_AUTHOR("Kyle McMartin <kyle@mcmartin.ca>"); | |
| 70 | MODULE_LICENSE("GPL"); | |
| 71 | MODULE_DESCRIPTION("Generic RTC driver"); | |
| 72 | MODULE_ALIAS("platform:rtc-generic"); |