1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 *  PS3 time and rtc routines.
4 *
5 *  Copyright (C) 2006 Sony Computer Entertainment Inc.
6 *  Copyright 2006 Sony Corp.
7 */
8
9#include <linux/kernel.h>
10#include <linux/platform_device.h>
11#include <linux/rtc.h>
12
13#include <asm/firmware.h>
14#include <asm/lv1call.h>
15#include <asm/ps3.h>
16
17#include "platform.h"
18
19void __init ps3_calibrate_decr(void)
20{
21	int result;
22	u64 tmp;
23
24	result = ps3_repository_read_be_tb_freq(0, &tmp);
25	BUG_ON(result);
26
27	ppc_tb_freq = tmp;
28	ppc_proc_freq = ppc_tb_freq * 40;
29}
30
31static u64 read_rtc(void)
32{
33	int result;
34	u64 rtc_val;
35	u64 tb_val;
36
37	result = lv1_get_rtc(&rtc_val, &tb_val);
38	BUG_ON(result);
39
40	return rtc_val;
41}
42
43time64_t __init ps3_get_boot_time(void)
44{
45	return read_rtc() + ps3_os_area_get_rtc_diff();
46}
47
48static int __init ps3_rtc_init(void)
49{
50	struct platform_device *pdev;
51
52	if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
53		return -ENODEV;
54
55	pdev = platform_device_register_simple("rtc-ps3", -1, NULL, 0);
56
57	return PTR_ERR_OR_ZERO(pdev);
58}
59device_initcall(ps3_rtc_init);
60