diff options
author | 2016-04-11 10:41:07 +0300 | |
---|---|---|
committer | 2016-04-13 08:17:18 +0300 | |
commit | e09b41010ba33a20a87472ee821fa407a5b8da36 (patch) | |
tree | d10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/drivers/rtc/rtc-efi.c | |
parent | f93b97fd65072de626c074dbe099a1fff05ce060 (diff) |
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page.
During the rebasing, the following patch collided:
Force tick interrupt and get rid of softirq magic(I70131fb85).
Collisions have been removed because its logic was found on the
source already.
Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/drivers/rtc/rtc-efi.c')
-rw-r--r-- | kernel/drivers/rtc/rtc-efi.c | 43 |
1 files changed, 16 insertions, 27 deletions
diff --git a/kernel/drivers/rtc/rtc-efi.c b/kernel/drivers/rtc/rtc-efi.c index cb989cd00..3806961b4 100644 --- a/kernel/drivers/rtc/rtc-efi.c +++ b/kernel/drivers/rtc/rtc-efi.c @@ -3,7 +3,7 @@ * * Copyright (C) 2009 Hewlett-Packard Development Company, L.P. * - * Author: dann frazier <dannf@hp.com> + * Author: dann frazier <dannf@dannf.org> * Based on efirtc.c by Stephane Eranian * * This program is free software; you can redistribute it and/or modify it @@ -24,10 +24,6 @@ #include <linux/efi.h> #define EFI_ISDST (EFI_TIME_ADJUST_DAYLIGHT|EFI_TIME_IN_DAYLIGHT) -/* - * EFI Epoch is 1/1/1998 - */ -#define EFI_RTC_EPOCH 1998 /* * returns day of the year [0-365] @@ -38,31 +34,24 @@ compute_yday(efi_time_t *eft) /* efi_time_t.month is in the [1-12] so, we need -1 */ return rtc_year_days(eft->day, eft->month - 1, eft->year); } + /* * returns day of the week [0-6] 0=Sunday - * - * Don't try to provide a year that's before 1998, please ! */ static int -compute_wday(efi_time_t *eft) +compute_wday(efi_time_t *eft, int yday) { - int y; - int ndays = 0; - - if (eft->year < EFI_RTC_EPOCH) { - pr_err("EFI year < " __stringify(EFI_RTC_EPOCH) ", invalid date\n"); - return -1; - } - - for (y = EFI_RTC_EPOCH; y < eft->year; y++) - ndays += 365 + (is_leap_year(y) ? 1 : 0); - - ndays += compute_yday(eft); + int ndays = eft->year * (365 % 7) + + (eft->year - 1) / 4 + - (eft->year - 1) / 100 + + (eft->year - 1) / 400 + + yday; /* - * 4=1/1/1998 was a Thursday + * 1/1/0000 may or may not have been a Sunday (if it ever existed at + * all) but assuming it was makes this calculation work correctly. */ - return (ndays + 4) % 7; + return ndays % 7; } static void @@ -103,16 +92,16 @@ convert_from_efi_time(efi_time_t *eft, struct rtc_time *wtime) if (!eft->month || eft->month > 12) return false; wtime->tm_mon = eft->month - 1; - wtime->tm_year = eft->year - 1900; - /* day of the week [0-6], Sunday=0 */ - wtime->tm_wday = compute_wday(eft); - if (wtime->tm_wday < 0) + if (eft->year < 1900 || eft->year > 9999) return false; + wtime->tm_year = eft->year - 1900; /* day in the year [1-365]*/ wtime->tm_yday = compute_yday(eft); + /* day of the week [0-6], Sunday=0 */ + wtime->tm_wday = compute_wday(eft, wtime->tm_yday); switch (eft->daylight & EFI_ISDST) { case EFI_ISDST: @@ -233,7 +222,7 @@ static struct platform_driver efi_rtc_driver = { module_platform_driver_probe(efi_rtc_driver, efi_rtc_probe); MODULE_ALIAS("platform:rtc-efi"); -MODULE_AUTHOR("dann frazier <dannf@hp.com>"); +MODULE_AUTHOR("dann frazier <dannf@dannf.org>"); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("EFI RTC driver"); MODULE_ALIAS("platform:rtc-efi"); |