1 // SPDX-License-Identifier: GPL-2.0
5 * Copyright 2009 Sony Corporation
8 #include <linux/kernel.h>
9 #include <linux/module.h>
10 #include <linux/platform_device.h>
11 #include <linux/rtc.h>
13 #include <asm/lv1call.h>
17 static u64 read_rtc(void)
23 result = lv1_get_rtc(&rtc_val, &tb_val);
29 static int ps3_get_time(struct device *dev, struct rtc_time *tm)
31 rtc_time64_to_tm(read_rtc() + ps3_os_area_get_rtc_diff(), tm);
35 static int ps3_set_time(struct device *dev, struct rtc_time *tm)
37 ps3_os_area_set_rtc_diff(rtc_tm_to_time64(tm) - read_rtc());
41 static const struct rtc_class_ops ps3_rtc_ops = {
42 .read_time = ps3_get_time,
43 .set_time = ps3_set_time,
46 static int __init ps3_rtc_probe(struct platform_device *dev)
48 struct rtc_device *rtc;
50 rtc = devm_rtc_allocate_device(&dev->dev);
54 rtc->ops = &ps3_rtc_ops;
55 rtc->range_max = U64_MAX;
57 platform_set_drvdata(dev, rtc);
59 return devm_rtc_register_device(rtc);
62 static struct platform_driver ps3_rtc_driver = {
68 module_platform_driver_probe(ps3_rtc_driver, ps3_rtc_probe);
70 MODULE_AUTHOR("Sony Corporation");
71 MODULE_LICENSE("GPL");
72 MODULE_DESCRIPTION("ps3 RTC driver");
73 MODULE_ALIAS("platform:rtc-ps3");