From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf0-f170.google.com ([209.85.192.170]:36100 "EHLO mail-pf0-f170.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751790AbdGRRZy (ORCPT ); Tue, 18 Jul 2017 13:25:54 -0400 Received: by mail-pf0-f170.google.com with SMTP id o88so8140957pfk.3 for ; Tue, 18 Jul 2017 10:25:54 -0700 (PDT) From: Mark Salyzyn 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 Subject: [PATCH 2/4] rtc-lib: Print wall time at die and reboot Date: Tue, 18 Jul 2017 10:25:43 -0700 Message-Id: <20170718172545.114568-1-salyzyn@android.com> Sender: linux-rtc-owner@vger.kernel.org List-ID: Permits power state and battery life diagnosis. Feature activated by CONFIG_RTC_SHOW_TIME. Signed-off-by: Mark Salyzyn --- drivers/rtc/rtc-lib.c | 58 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 58 insertions(+) diff --git a/drivers/rtc/rtc-lib.c b/drivers/rtc/rtc-lib.c index 676d6a83e843..c28fdfbb99d4 100644 --- a/drivers/rtc/rtc-lib.c +++ b/drivers/rtc/rtc-lib.c @@ -12,6 +12,8 @@ */ #include +#include +#include #include static const unsigned char rtc_days_in_month[] = { @@ -108,6 +110,62 @@ 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; +} +device_initcall(init_rtc_show_time); #endif /* -- 2.13.2.932.g7449e964c-goog