projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| e85b930b | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 0b5f037a GU |
2 | /* |
| 3 | * PS3 RTC Driver | |
| 4 | * | |
| 5 | * Copyright 2009 Sony Corporation | |
| 0b5f037a GU |
6 | */ |
| 7 | ||
| 8 | #include <linux/kernel.h> | |
| 9 | #include <linux/module.h> | |
| 10 | #include <linux/platform_device.h> | |
| 11 | #include <linux/rtc.h> | |
| 12 | ||
| 13 | #include <asm/lv1call.h> | |
| 14 | #include <asm/ps3.h> | |
| 15 | ||
| 16 | ||
| 17 | static u64 read_rtc(void) | |
| 18 | { | |
| 19 | int result; | |
| 20 | u64 rtc_val; | |
| 21 | u64 tb_val; | |
| 22 | ||
| 23 | result = lv1_get_rtc(&rtc_val, &tb_val); | |
| 24 | BUG_ON(result); | |
| 25 | ||
| 26 | return rtc_val; | |
| 27 | } | |
| 28 | ||
| 29 | static int ps3_get_time(struct device *dev, struct rtc_time *tm) | |
| 30 | { | |
| 70c805c2 | 31 | rtc_time64_to_tm(read_rtc() + ps3_os_area_get_rtc_diff(), tm); |
| ab62670e | 32 | return 0; |
| 0b5f037a GU |
33 | } |
| 34 | ||
| 35 | static int ps3_set_time(struct device *dev, struct rtc_time *tm) | |
| 36 | { | |
| 70c805c2 | 37 | ps3_os_area_set_rtc_diff(rtc_tm_to_time64(tm) - read_rtc()); |
| 0b5f037a GU |
38 | return 0; |
| 39 | } | |
| 40 | ||
| 41 | static const struct rtc_class_ops ps3_rtc_ops = { | |
| 42 | .read_time = ps3_get_time, | |
| 43 | .set_time = ps3_set_time, | |
| 44 | }; | |
| 45 | ||
| 46 | static int __init ps3_rtc_probe(struct platform_device *dev) | |
| 47 | { | |
| 48 | struct rtc_device *rtc; | |
| 49 | ||
| 0b5e47bb | 50 | rtc = devm_rtc_allocate_device(&dev->dev); |
| 0b5f037a GU |
51 | if (IS_ERR(rtc)) |
| 52 | return PTR_ERR(rtc); | |
| 53 | ||
| 0b5e47bb | 54 | rtc->ops = &ps3_rtc_ops; |
| 72dd89c0 | 55 | rtc->range_max = U64_MAX; |
| 0b5e47bb | 56 | |
| 0b5f037a | 57 | platform_set_drvdata(dev, rtc); |
| 0b5e47bb | 58 | |
| fdcfd854 | 59 | return devm_rtc_register_device(rtc); |
| 0b5f037a GU |
60 | } |
| 61 | ||
| 0b5f037a GU |
62 | static struct platform_driver ps3_rtc_driver = { |
| 63 | .driver = { | |
| 64 | .name = "rtc-ps3", | |
| 0b5f037a | 65 | }, |
| 0b5f037a GU |
66 | }; |
| 67 | ||
| 050bf1e4 | 68 | module_platform_driver_probe(ps3_rtc_driver, ps3_rtc_probe); |
| 0b5f037a GU |
69 | |
| 70 | MODULE_AUTHOR("Sony Corporation"); | |
| 71 | MODULE_LICENSE("GPL"); | |
| 72 | MODULE_DESCRIPTION("ps3 RTC driver"); | |
| 73 | MODULE_ALIAS("platform:rtc-ps3"); |