David S. Miller | 64d329e | 2007-10-27 00:17:01 -0700 | [diff] [blame] | 1 | /* linux/arch/sparc/kernel/time.c |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * |
David S. Miller | 64d329e | 2007-10-27 00:17:01 -0700 | [diff] [blame] | 3 | * Copyright (C) 1995 David S. Miller (davem@davemloft.net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * Copyright (C) 1996 Thomas K. Dyas (tdyas@eden.rutgers.edu) |
| 5 | * |
| 6 | * Chris Davis (cdavis@cois.on.ca) 03/27/1998 |
| 7 | * Added support for the intersil on the sun4/4200 |
| 8 | * |
| 9 | * Gleb Raiko (rajko@mech.math.msu.su) 08/18/1998 |
| 10 | * Support for MicroSPARC-IIep, PCI CPU. |
| 11 | * |
| 12 | * This file handles the Sparc specific time handling details. |
| 13 | * |
| 14 | * 1997-09-10 Updated NTP code according to technical memorandum Jan '96 |
| 15 | * "A Kernel Model for Precision Timekeeping" by Dave Mills |
| 16 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <linux/errno.h> |
| 18 | #include <linux/module.h> |
| 19 | #include <linux/sched.h> |
| 20 | #include <linux/kernel.h> |
| 21 | #include <linux/param.h> |
| 22 | #include <linux/string.h> |
| 23 | #include <linux/mm.h> |
| 24 | #include <linux/interrupt.h> |
| 25 | #include <linux/time.h> |
David S. Miller | c4cbe6f | 2008-09-03 15:52:38 -0700 | [diff] [blame] | 26 | #include <linux/rtc.h> |
| 27 | #include <linux/rtc/m48t59.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include <linux/timex.h> |
| 29 | #include <linux/init.h> |
| 30 | #include <linux/pci.h> |
| 31 | #include <linux/ioport.h> |
| 32 | #include <linux/profile.h> |
David S. Miller | 454eeb2 | 2008-08-27 04:05:35 -0700 | [diff] [blame] | 33 | #include <linux/of.h> |
Stephen Rothwell | 764f257 | 2008-08-07 15:33:36 -0700 | [diff] [blame] | 34 | #include <linux/of_device.h> |
David S. Miller | c4cbe6f | 2008-09-03 15:52:38 -0700 | [diff] [blame] | 35 | #include <linux/platform_device.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | |
| 37 | #include <asm/oplib.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #include <asm/timer.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include <asm/system.h> |
| 40 | #include <asm/irq.h> |
| 41 | #include <asm/io.h> |
| 42 | #include <asm/idprom.h> |
| 43 | #include <asm/machines.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | #include <asm/page.h> |
| 45 | #include <asm/pcic.h> |
Al Viro | 0d84438 | 2006-10-08 14:30:44 +0100 | [diff] [blame] | 46 | #include <asm/irq_regs.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | |
Al Viro | 32231a6 | 2007-07-21 19:18:57 -0700 | [diff] [blame] | 48 | #include "irq.h" |
| 49 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | DEFINE_SPINLOCK(rtc_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | static int set_rtc_mmss(unsigned long); |
| 52 | static int sbus_do_settimeofday(struct timespec *tv); |
| 53 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | unsigned long profile_pc(struct pt_regs *regs) |
| 55 | { |
| 56 | extern char __copy_user_begin[], __copy_user_end[]; |
| 57 | extern char __atomic_begin[], __atomic_end[]; |
| 58 | extern char __bzero_begin[], __bzero_end[]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | |
| 60 | unsigned long pc = regs->pc; |
| 61 | |
| 62 | if (in_lock_functions(pc) || |
| 63 | (pc >= (unsigned long) __copy_user_begin && |
| 64 | pc < (unsigned long) __copy_user_end) || |
| 65 | (pc >= (unsigned long) __atomic_begin && |
| 66 | pc < (unsigned long) __atomic_end) || |
| 67 | (pc >= (unsigned long) __bzero_begin && |
David S. Miller | 8a8b836 | 2006-12-17 16:18:47 -0800 | [diff] [blame] | 68 | pc < (unsigned long) __bzero_end)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | pc = regs->u_regs[UREG_RETPC]; |
| 70 | return pc; |
| 71 | } |
| 72 | |
Martin Habets | 9550e59 | 2006-10-17 19:21:48 -0700 | [diff] [blame] | 73 | EXPORT_SYMBOL(profile_pc); |
| 74 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | __volatile__ unsigned int *master_l10_counter; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | |
| 77 | /* |
| 78 | * timer_interrupt() needs to keep up the real-time clock, |
| 79 | * as well as call the "do_timer()" routine every clocktick |
| 80 | */ |
| 81 | |
| 82 | #define TICK_SIZE (tick_nsec / 1000) |
| 83 | |
Jeff Garzik | 5dc0742 | 2007-10-31 05:08:48 -0400 | [diff] [blame] | 84 | static irqreturn_t timer_interrupt(int dummy, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | { |
| 86 | /* last time the cmos clock got updated */ |
| 87 | static long last_rtc_update; |
| 88 | |
| 89 | #ifndef CONFIG_SMP |
Al Viro | 0d84438 | 2006-10-08 14:30:44 +0100 | [diff] [blame] | 90 | profile_tick(CPU_PROFILING); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | #endif |
| 92 | |
| 93 | /* Protect counter clear so that do_gettimeoffset works */ |
| 94 | write_seqlock(&xtime_lock); |
Adrian Bunk | 5110bd2 | 2008-08-31 20:59:37 -0700 | [diff] [blame] | 95 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | clear_clock_irq(); |
| 97 | |
Atsushi Nemoto | 3171a03 | 2006-09-29 02:00:32 -0700 | [diff] [blame] | 98 | do_timer(1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | |
| 100 | /* Determine when to update the Mostek clock. */ |
john stultz | b149ee2 | 2005-09-06 15:17:46 -0700 | [diff] [blame] | 101 | if (ntp_synced() && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | xtime.tv_sec > last_rtc_update + 660 && |
| 103 | (xtime.tv_nsec / 1000) >= 500000 - ((unsigned) TICK_SIZE) / 2 && |
| 104 | (xtime.tv_nsec / 1000) <= 500000 + ((unsigned) TICK_SIZE) / 2) { |
| 105 | if (set_rtc_mmss(xtime.tv_sec) == 0) |
| 106 | last_rtc_update = xtime.tv_sec; |
| 107 | else |
| 108 | last_rtc_update = xtime.tv_sec - 600; /* do it again in 60 s */ |
| 109 | } |
| 110 | write_sequnlock(&xtime_lock); |
| 111 | |
Peter Zijlstra | aa02cd2 | 2008-02-13 21:33:16 +0100 | [diff] [blame] | 112 | #ifndef CONFIG_SMP |
| 113 | update_process_times(user_mode(get_irq_regs())); |
| 114 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | return IRQ_HANDLED; |
| 116 | } |
| 117 | |
David S. Miller | c4cbe6f | 2008-09-03 15:52:38 -0700 | [diff] [blame] | 118 | static unsigned char mostek_read_byte(struct device *dev, u32 ofs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | { |
David S. Miller | c4cbe6f | 2008-09-03 15:52:38 -0700 | [diff] [blame] | 120 | struct platform_device *pdev = to_platform_device(dev); |
| 121 | struct m48t59_plat_data *pdata = pdev->dev.platform_data; |
| 122 | void __iomem *regs = pdata->ioaddr; |
| 123 | unsigned char val = readb(regs + ofs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | |
David S. Miller | c4cbe6f | 2008-09-03 15:52:38 -0700 | [diff] [blame] | 125 | /* the year 0 is 1968 */ |
| 126 | if (ofs == pdata->offset + M48T59_YEAR) { |
| 127 | val += 0x68; |
| 128 | if ((val & 0xf) > 9) |
| 129 | val += 6; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | } |
David S. Miller | c4cbe6f | 2008-09-03 15:52:38 -0700 | [diff] [blame] | 131 | return val; |
| 132 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | |
David S. Miller | c4cbe6f | 2008-09-03 15:52:38 -0700 | [diff] [blame] | 134 | static void mostek_write_byte(struct device *dev, u32 ofs, u8 val) |
| 135 | { |
| 136 | struct platform_device *pdev = to_platform_device(dev); |
| 137 | struct m48t59_plat_data *pdata = pdev->dev.platform_data; |
| 138 | void __iomem *regs = pdata->ioaddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | |
David S. Miller | c4cbe6f | 2008-09-03 15:52:38 -0700 | [diff] [blame] | 140 | if (ofs == pdata->offset + M48T59_YEAR) { |
| 141 | if (val < 0x68) |
| 142 | val += 0x32; |
| 143 | else |
| 144 | val -= 0x68; |
| 145 | if ((val & 0xf) > 9) |
| 146 | val += 6; |
| 147 | if ((val & 0xf0) > 0x9A) |
| 148 | val += 0x60; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | } |
David S. Miller | c4cbe6f | 2008-09-03 15:52:38 -0700 | [diff] [blame] | 150 | writeb(val, regs + ofs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | } |
| 152 | |
David S. Miller | c4cbe6f | 2008-09-03 15:52:38 -0700 | [diff] [blame] | 153 | static struct m48t59_plat_data m48t59_data = { |
| 154 | .read_byte = mostek_read_byte, |
| 155 | .write_byte = mostek_write_byte, |
| 156 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | |
David S. Miller | c4cbe6f | 2008-09-03 15:52:38 -0700 | [diff] [blame] | 158 | /* resource is set at runtime */ |
| 159 | static struct platform_device m48t59_rtc = { |
| 160 | .name = "rtc-m48t59", |
| 161 | .id = 0, |
| 162 | .num_resources = 1, |
| 163 | .dev = { |
| 164 | .platform_data = &m48t59_data, |
| 165 | }, |
| 166 | }; |
Bob Breuer | 96ba989 | 2006-07-27 22:08:01 -0700 | [diff] [blame] | 167 | |
David S. Miller | ee5caf0 | 2006-06-29 14:36:52 -0700 | [diff] [blame] | 168 | static int __devinit clock_probe(struct of_device *op, const struct of_device_id *match) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | { |
David S. Miller | ee5caf0 | 2006-06-29 14:36:52 -0700 | [diff] [blame] | 170 | struct device_node *dp = op->node; |
Stephen Rothwell | 8271f04 | 2007-03-29 00:47:23 -0700 | [diff] [blame] | 171 | const char *model = of_get_property(dp, "model", NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | |
David S. Miller | ee5caf0 | 2006-06-29 14:36:52 -0700 | [diff] [blame] | 173 | if (!model) |
| 174 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | |
David S. Miller | c4cbe6f | 2008-09-03 15:52:38 -0700 | [diff] [blame] | 176 | m48t59_rtc.resource = &op->resource[0]; |
David S. Miller | ee5caf0 | 2006-06-29 14:36:52 -0700 | [diff] [blame] | 177 | if (!strcmp(model, "mk48t02")) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | /* Map the clock register io area read-only */ |
David S. Miller | c4cbe6f | 2008-09-03 15:52:38 -0700 | [diff] [blame] | 179 | m48t59_data.ioaddr = of_ioremap(&op->resource[0], 0, |
| 180 | 2048, "rtc-m48t59"); |
| 181 | m48t59_data.type = M48T59RTC_TYPE_M48T02; |
David S. Miller | ee5caf0 | 2006-06-29 14:36:52 -0700 | [diff] [blame] | 182 | } else if (!strcmp(model, "mk48t08")) { |
David S. Miller | c4cbe6f | 2008-09-03 15:52:38 -0700 | [diff] [blame] | 183 | m48t59_data.ioaddr = of_ioremap(&op->resource[0], 0, |
| 184 | 8192, "rtc-m48t59"); |
| 185 | m48t59_data.type = M48T59RTC_TYPE_M48T08; |
David S. Miller | ee5caf0 | 2006-06-29 14:36:52 -0700 | [diff] [blame] | 186 | } else |
| 187 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | |
David S. Miller | c4cbe6f | 2008-09-03 15:52:38 -0700 | [diff] [blame] | 189 | if (platform_device_register(&m48t59_rtc) < 0) |
| 190 | printk(KERN_ERR "Registering RTC device failed\n"); |
Bob Breuer | 96ba989 | 2006-07-27 22:08:01 -0700 | [diff] [blame] | 191 | |
David S. Miller | ee5caf0 | 2006-06-29 14:36:52 -0700 | [diff] [blame] | 192 | return 0; |
| 193 | } |
| 194 | |
David S. Miller | fd09831 | 2008-08-31 01:23:17 -0700 | [diff] [blame] | 195 | static struct of_device_id __initdata clock_match[] = { |
David S. Miller | ee5caf0 | 2006-06-29 14:36:52 -0700 | [diff] [blame] | 196 | { |
| 197 | .name = "eeprom", |
| 198 | }, |
| 199 | {}, |
| 200 | }; |
| 201 | |
| 202 | static struct of_platform_driver clock_driver = { |
David S. Miller | ee5caf0 | 2006-06-29 14:36:52 -0700 | [diff] [blame] | 203 | .match_table = clock_match, |
| 204 | .probe = clock_probe, |
Stephen Rothwell | a2cd155 | 2007-10-10 23:27:34 -0700 | [diff] [blame] | 205 | .driver = { |
David S. Miller | c4cbe6f | 2008-09-03 15:52:38 -0700 | [diff] [blame] | 206 | .name = "rtc", |
Stephen Rothwell | a2cd155 | 2007-10-10 23:27:34 -0700 | [diff] [blame] | 207 | }, |
David S. Miller | ee5caf0 | 2006-06-29 14:36:52 -0700 | [diff] [blame] | 208 | }; |
| 209 | |
| 210 | |
| 211 | /* Probe for the mostek real time clock chip. */ |
Bob Breuer | 96ba989 | 2006-07-27 22:08:01 -0700 | [diff] [blame] | 212 | static int __init clock_init(void) |
David S. Miller | ee5caf0 | 2006-06-29 14:36:52 -0700 | [diff] [blame] | 213 | { |
Stephen Rothwell | 37b7754 | 2007-04-30 17:43:56 +1000 | [diff] [blame] | 214 | return of_register_driver(&clock_driver, &of_platform_bus_type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | } |
| 216 | |
Bob Breuer | 96ba989 | 2006-07-27 22:08:01 -0700 | [diff] [blame] | 217 | /* Must be after subsys_initcall() so that busses are probed. Must |
| 218 | * be before device_initcall() because things like the RTC driver |
| 219 | * need to see the clock registers. |
| 220 | */ |
| 221 | fs_initcall(clock_init); |
Bob Breuer | 96ba989 | 2006-07-27 22:08:01 -0700 | [diff] [blame] | 222 | |
Adrian Bunk | c61c65c | 2008-06-05 11:40:58 -0700 | [diff] [blame] | 223 | static void __init sbus_time_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | |
| 226 | BTFIXUPSET_CALL(bus_do_settimeofday, sbus_do_settimeofday, BTFIXUPCALL_NORM); |
| 227 | btfixup(); |
| 228 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | sparc_init_timers(timer_interrupt); |
| 230 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | /* Now that OBP ticker has been silenced, it is safe to enable IRQ. */ |
| 232 | local_irq_enable(); |
| 233 | } |
| 234 | |
| 235 | void __init time_init(void) |
| 236 | { |
| 237 | #ifdef CONFIG_PCI |
| 238 | extern void pci_time_init(void); |
| 239 | if (pcic_present()) { |
| 240 | pci_time_init(); |
| 241 | return; |
| 242 | } |
| 243 | #endif |
| 244 | sbus_time_init(); |
| 245 | } |
| 246 | |
Adrian Bunk | 3115624 | 2005-10-03 17:37:02 -0700 | [diff] [blame] | 247 | static inline unsigned long do_gettimeoffset(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | { |
David S. Miller | 000775c | 2008-01-09 05:09:06 -0800 | [diff] [blame] | 249 | unsigned long val = *master_l10_counter; |
| 250 | unsigned long usec = (val >> 10) & 0x1fffff; |
| 251 | |
| 252 | /* Limit hit? */ |
| 253 | if (val & 0x80000000) |
| 254 | usec += 1000000 / HZ; |
| 255 | |
| 256 | return usec; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | } |
| 258 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | /* Ok, my cute asm atomicity trick doesn't work anymore. |
| 260 | * There are just too many variables that need to be protected |
Atsushi Nemoto | 8ef3860 | 2006-09-30 23:28:31 -0700 | [diff] [blame] | 261 | * now (both members of xtime, et al.) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | */ |
| 263 | void do_gettimeofday(struct timeval *tv) |
| 264 | { |
| 265 | unsigned long flags; |
| 266 | unsigned long seq; |
| 267 | unsigned long usec, sec; |
| 268 | unsigned long max_ntp_tick = tick_usec - tickadj; |
| 269 | |
| 270 | do { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | seq = read_seqbegin_irqsave(&xtime_lock, flags); |
| 272 | usec = do_gettimeoffset(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | |
| 274 | /* |
| 275 | * If time_adjust is negative then NTP is slowing the clock |
| 276 | * so make sure not to go into next possible interval. |
| 277 | * Better to lose some accuracy than have time go backwards.. |
| 278 | */ |
Atsushi Nemoto | 8ef3860 | 2006-09-30 23:28:31 -0700 | [diff] [blame] | 279 | if (unlikely(time_adjust < 0)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | usec = min(usec, max_ntp_tick); |
| 281 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | sec = xtime.tv_sec; |
| 283 | usec += (xtime.tv_nsec / 1000); |
| 284 | } while (read_seqretry_irqrestore(&xtime_lock, seq, flags)); |
| 285 | |
| 286 | while (usec >= 1000000) { |
| 287 | usec -= 1000000; |
| 288 | sec++; |
| 289 | } |
| 290 | |
| 291 | tv->tv_sec = sec; |
| 292 | tv->tv_usec = usec; |
| 293 | } |
| 294 | |
| 295 | EXPORT_SYMBOL(do_gettimeofday); |
| 296 | |
| 297 | int do_settimeofday(struct timespec *tv) |
| 298 | { |
| 299 | int ret; |
| 300 | |
| 301 | write_seqlock_irq(&xtime_lock); |
| 302 | ret = bus_do_settimeofday(tv); |
| 303 | write_sequnlock_irq(&xtime_lock); |
| 304 | clock_was_set(); |
| 305 | return ret; |
| 306 | } |
| 307 | |
| 308 | EXPORT_SYMBOL(do_settimeofday); |
| 309 | |
| 310 | static int sbus_do_settimeofday(struct timespec *tv) |
| 311 | { |
| 312 | time_t wtm_sec, sec = tv->tv_sec; |
| 313 | long wtm_nsec, nsec = tv->tv_nsec; |
| 314 | |
| 315 | if ((unsigned long)tv->tv_nsec >= NSEC_PER_SEC) |
| 316 | return -EINVAL; |
| 317 | |
| 318 | /* |
| 319 | * This is revolting. We need to set "xtime" correctly. However, the |
| 320 | * value in this location is the value at the most recent update of |
| 321 | * wall time. Discover what correction gettimeofday() would have |
| 322 | * made, and then undo it! |
| 323 | */ |
Atsushi Nemoto | 8ef3860 | 2006-09-30 23:28:31 -0700 | [diff] [blame] | 324 | nsec -= 1000 * do_gettimeoffset(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | |
| 326 | wtm_sec = wall_to_monotonic.tv_sec + (xtime.tv_sec - sec); |
| 327 | wtm_nsec = wall_to_monotonic.tv_nsec + (xtime.tv_nsec - nsec); |
| 328 | |
| 329 | set_normalized_timespec(&xtime, sec, nsec); |
| 330 | set_normalized_timespec(&wall_to_monotonic, wtm_sec, wtm_nsec); |
| 331 | |
john stultz | b149ee2 | 2005-09-06 15:17:46 -0700 | [diff] [blame] | 332 | ntp_clear(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | return 0; |
| 334 | } |
| 335 | |
David S. Miller | c4cbe6f | 2008-09-03 15:52:38 -0700 | [diff] [blame] | 336 | static int set_rtc_mmss(unsigned long secs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | { |
David S. Miller | c4cbe6f | 2008-09-03 15:52:38 -0700 | [diff] [blame] | 338 | struct rtc_device *rtc = rtc_class_open("rtc0"); |
David S. Miller | ab138c0 | 2008-09-10 13:36:13 -0700 | [diff] [blame] | 339 | int err = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | |
David S. Miller | ab138c0 | 2008-09-10 13:36:13 -0700 | [diff] [blame] | 341 | if (rtc) { |
| 342 | err = rtc_set_mmss(rtc, secs); |
| 343 | rtc_class_close(rtc); |
| 344 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | |
David S. Miller | ab138c0 | 2008-09-10 13:36:13 -0700 | [diff] [blame] | 346 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | } |