| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1 | /* |
| 2 | * arch/sh/kernel/time.c |
| 3 | * |
| 4 | * Copyright (C) 1999 Tetsuya Okada & Niibe Yutaka |
| 5 | * Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org> |
| 6 | * Copyright (C) 2002 - 2009 Paul Mundt |
| 7 | * Copyright (C) 2002 M. R. Brown <mrbrown@linux-sh.org> |
| 8 | * |
| 9 | * This file is subject to the terms and conditions of the GNU General Public |
| 10 | * License. See the file "COPYING" in the main directory of this archive |
| 11 | * for more details. |
| 12 | */ |
| 13 | #include <linux/kernel.h> |
| 14 | #include <linux/init.h> |
| 15 | #include <linux/profile.h> |
| 16 | #include <linux/timex.h> |
| 17 | #include <linux/sched.h> |
| 18 | #include <linux/clockchips.h> |
| 19 | #include <linux/platform_device.h> |
| 20 | #include <linux/smp.h> |
| 21 | #include <linux/rtc.h> |
| 22 | #include <asm/clock.h> |
| 23 | #include <asm/rtc.h> |
| 24 | |
| 25 | /* Dummy RTC ops */ |
| 26 | static void null_rtc_get_time(struct timespec *tv) |
| 27 | { |
| 28 | tv->tv_sec = mktime(2000, 1, 1, 0, 0, 0); |
| 29 | tv->tv_nsec = 0; |
| 30 | } |
| 31 | |
| 32 | static int null_rtc_set_time(const time_t secs) |
| 33 | { |
| 34 | return 0; |
| 35 | } |
| 36 | |
| 37 | void (*rtc_sh_get_time)(struct timespec *) = null_rtc_get_time; |
| 38 | int (*rtc_sh_set_time)(const time_t) = null_rtc_set_time; |
| 39 | |
| 40 | void read_persistent_clock(struct timespec *ts) |
| 41 | { |
| 42 | rtc_sh_get_time(ts); |
| 43 | } |
| 44 | |
| 45 | #ifdef CONFIG_GENERIC_CMOS_UPDATE |
| 46 | int update_persistent_clock(struct timespec now) |
| 47 | { |
| 48 | return rtc_sh_set_time(now.tv_sec); |
| 49 | } |
| 50 | #endif |
| 51 | |
| 52 | static int rtc_generic_get_time(struct device *dev, struct rtc_time *tm) |
| 53 | { |
| 54 | struct timespec tv; |
| 55 | |
| 56 | rtc_sh_get_time(&tv); |
| 57 | rtc_time_to_tm(tv.tv_sec, tm); |
| 58 | return 0; |
| 59 | } |
| 60 | |
| 61 | static int rtc_generic_set_time(struct device *dev, struct rtc_time *tm) |
| 62 | { |
| 63 | unsigned long secs; |
| 64 | |
| 65 | rtc_tm_to_time(tm, &secs); |
| 66 | if ((rtc_sh_set_time == null_rtc_set_time) || |
| 67 | (rtc_sh_set_time(secs) < 0)) |
| 68 | return -EOPNOTSUPP; |
| 69 | |
| 70 | return 0; |
| 71 | } |
| 72 | |
| 73 | static const struct rtc_class_ops rtc_generic_ops = { |
| 74 | .read_time = rtc_generic_get_time, |
| 75 | .set_time = rtc_generic_set_time, |
| 76 | }; |
| 77 | |
| 78 | static int __init rtc_generic_init(void) |
| 79 | { |
| 80 | struct platform_device *pdev; |
| 81 | |
| 82 | if (rtc_sh_get_time == null_rtc_get_time) |
| 83 | return -ENODEV; |
| 84 | |
| 85 | pdev = platform_device_register_data(NULL, "rtc-generic", -1, |
| 86 | &rtc_generic_ops, |
| 87 | sizeof(rtc_generic_ops)); |
| 88 | |
| 89 | |
| 90 | return PTR_ERR_OR_ZERO(pdev); |
| 91 | } |
| 92 | device_initcall(rtc_generic_init); |
| 93 | |
| 94 | void (*board_time_init)(void); |
| 95 | |
| 96 | static void __init sh_late_time_init(void) |
| 97 | { |
| 98 | /* |
| 99 | * Make sure all compiled-in early timers register themselves. |
| 100 | * |
| 101 | * Run probe() for two "earlytimer" devices, these will be the |
| 102 | * clockevents and clocksource devices respectively. In the event |
| 103 | * that only a clockevents device is available, we -ENODEV on the |
| 104 | * clocksource and the jiffies clocksource is used transparently |
| 105 | * instead. No error handling is necessary here. |
| 106 | */ |
| 107 | early_platform_driver_register_all("earlytimer"); |
| 108 | early_platform_driver_probe("earlytimer", 2, 0); |
| 109 | } |
| 110 | |
| 111 | void __init time_init(void) |
| 112 | { |
| 113 | if (board_time_init) |
| 114 | board_time_init(); |
| 115 | |
| 116 | clk_init(); |
| 117 | |
| 118 | late_time_init = sh_late_time_init; |
| 119 | } |