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
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
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
43 time64_t __init ps3_get_boot_time(void)
44 {
45 return read_rtc() + ps3_os_area_get_rtc_diff();
46 }
47
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
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