From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Salyzyn Subject: [PATCH v2 2/4] time: Print wall time at die and reboot Date: Tue, 18 Jul 2017 14:21:08 -0700 Message-ID: <20170718212117.123296-1-salyzyn@android.com> Return-path: Received: from mail-pf0-f178.google.com ([209.85.192.178]:34160 "EHLO mail-pf0-f178.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752455AbdGRVVb (ORCPT ); Tue, 18 Jul 2017 17:21:31 -0400 Received: by mail-pf0-f178.google.com with SMTP id q85so17132768pfq.1 for ; Tue, 18 Jul 2017 14:21:31 -0700 (PDT) Sender: linux-pm-owner@vger.kernel.org List-Id: linux-pm@vger.kernel.org To: linux-kernel@vger.kernel.org Cc: rjw@rjwysocki.net, len.brown@intel.com, pavel@ucw.cz, linux-pm@vger.kernel.org, a.zummo@towertech.it, alexandre.belloni@free-electrons.com, linux-rtc@vger.kernel.org, Mark Salyzyn , Mark Salyzyn , Thierry Strudel Permits power state and battery life diagnosis. Feature activated by CONFIG_RTC_SHOW_TIME. Signed-off-by: Mark Salyzyn v2: - react to implementation move to kernel timekeeping from rtc_lib - use late_initcall to ensure rtc_lib driver(s) are loaded --- kernel/time/rtc_show_time.c | 59 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) diff --git a/kernel/time/rtc_show_time.c b/kernel/time/rtc_show_time.c index bbf4f92abf4f..d52e2a76cd00 100644 --- a/kernel/time/rtc_show_time.c +++ b/kernel/time/rtc_show_time.c @@ -6,6 +6,8 @@ * published by the Free Software Foundation. */ +#include +#include #include void rtc_show_time(const char *prefix_msg) @@ -21,3 +23,60 @@ void rtc_show_time(const char *prefix_msg) tm.tm_hour, tm.tm_min, tm.tm_sec, ts.tv_nsec); } EXPORT_SYMBOL(rtc_show_time); + +static int rtc_show_time_die_notify(struct notifier_block *self, + unsigned long event, void *data) +{ + if (event != DIE_OOPS) + return NOTIFY_DONE; + rtc_show_time("Oops"); + return NOTIFY_DONE; +} + +static struct notifier_block rtc_show_time_die_nb = { + .notifier_call = rtc_show_time_die_notify, + .priority = 0, +}; + +static int rtc_show_time_reboot_notify(struct notifier_block *self, + unsigned long event, void *data) +{ + const char *txt; + + switch (event) { + case SYS_RESTART: + txt = "Restart"; + break; + case SYS_HALT: + txt = "Halt"; + break; + case SYS_POWER_OFF: + txt = "Power-Off"; + break; + default: + return NOTIFY_DONE; + } + rtc_show_time(txt); + return NOTIFY_DONE; +} + +static struct notifier_block rtc_show_time_reboot_nb = { + .notifier_call = rtc_show_time_reboot_notify, + .priority = 0, +}; + +static __init int init_rtc_show_time(void) +{ + int ret; + + ret = register_die_notifier(&rtc_show_time_die_nb); + if (ret) + pr_warn("Failed to register rtc_show_time die notifier\n"); + ret = register_reboot_notifier(&rtc_show_time_reboot_nb); + if (ret) + pr_warn("Failed to register rtc_show_time reboot notifier\n"); + + return ret; +} +/* rtc driver needs to be loaded before this is truly functional */ +late_initcall(init_rtc_show_time); -- 2.13.2.932.g7449e964c-goog