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 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 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 55 time64_t __init ps3_get_boot_time(void) 56 { 57 return read_rtc() + ps3_os_area_get_rtc_diff(); 58 } 59 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