1 /*
2 * PS3 time and rtc routines.
3 *
4 * Copyright (C) 2006 Sony Computer Entertainment Inc.
5 * Copyright 2006 Sony Corp.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; version 2 of the License.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20
21 #include <linux/kernel.h>
22 #include <linux/platform_device.h>
23 #include <linux/rtc.h>
24
25 #include <asm/firmware.h>
26 #include <asm/lv1call.h>
27 #include <asm/ps3.h>
28
29 #include "platform.h"
30
ps3_calibrate_decr(void)31 void __init ps3_calibrate_decr(void)
32 {
33 int result;
34 u64 tmp;
35
36 result = ps3_repository_read_be_tb_freq(0, &tmp);
37 BUG_ON(result);
38
39 ppc_tb_freq = tmp;
40 ppc_proc_freq = ppc_tb_freq * 40;
41 }
42
read_rtc(void)43 static u64 read_rtc(void)
44 {
45 int result;
46 u64 rtc_val;
47 u64 tb_val;
48
49 result = lv1_get_rtc(&rtc_val, &tb_val);
50 BUG_ON(result);
51
52 return rtc_val;
53 }
54
ps3_get_boot_time(void)55 time64_t __init ps3_get_boot_time(void)
56 {
57 return read_rtc() + ps3_os_area_get_rtc_diff();
58 }
59
ps3_rtc_init(void)60 static int __init ps3_rtc_init(void)
61 {
62 struct platform_device *pdev;
63
64 if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
65 return -ENODEV;
66
67 pdev = platform_device_register_simple("rtc-ps3", -1, NULL, 0);
68
69 return PTR_ERR_OR_ZERO(pdev);
70 }
71 device_initcall(ps3_rtc_init);
72