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 
ps3_calibrate_decr(void)19 void __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 
read_rtc(void)31 static 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 
ps3_get_boot_time(void)43 time64_t __init ps3_get_boot_time(void)
44 {
45 	return read_rtc() + ps3_os_area_get_rtc_diff();
46 }
47 
ps3_rtc_init(void)48 static 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 }
59 device_initcall(ps3_rtc_init);
60