| 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(be_index: 0, tb_freq: &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(name: "rtc-ps3", id: -1, NULL, num: 0); |
| 56 | |
| 57 | return PTR_ERR_OR_ZERO(ptr: pdev); |
| 58 | } |
| 59 | device_initcall(ps3_rtc_init); |
| 60 |