Date: Thu, 2 Feb 2023 07:25:47 GMT From: =?utf-8?Q?Corvin=20K=C3=B6hne?= <corvink@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: 55f1ca209d37 - main - atrtc: expose power loss as sysctl Message-ID: <202302020725.3127PlLK046633@gitrepo.freebsd.org>
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The branch main has been updated by corvink: URL: https://cgit.FreeBSD.org/src/commit/?id=55f1ca209d37d7b5a6faf57b23c7341cb7f84ee6 commit 55f1ca209d37d7b5a6faf57b23c7341cb7f84ee6 Author: Corvin Köhne <corvink@FreeBSD.org> AuthorDate: 2022-12-08 07:28:42 +0000 Commit: Corvin Köhne <corvink@FreeBSD.org> CommitDate: 2023-02-02 07:25:08 +0000 atrtc: expose power loss as sysctl Exposing the a power loss of the rtc as an sysctl makes it easier to detect an empty cmos battery. Reviewed by: manu MFC after: 1 week Sponsored by: Beckhoff Automation GmbH & Co. KG Differential Revision: https://reviews.freebsd.org/D38325 --- sys/x86/isa/atrtc.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/sys/x86/isa/atrtc.c b/sys/x86/isa/atrtc.c index 33eb9a4bbdf0..81ba400619cc 100644 --- a/sys/x86/isa/atrtc.c +++ b/sys/x86/isa/atrtc.c @@ -62,6 +62,11 @@ __FBSDID("$FreeBSD$"); #include <machine/md_var.h> #endif +/* tunable to detect a power loss of the rtc */ +static bool atrtc_power_lost = false; +SYSCTL_BOOL(_machdep, OID_AUTO, atrtc_power_lost, CTLFLAG_RD, &atrtc_power_lost, + false, "RTC lost power on last power cycle (probably caused by an emtpy cmos battery)"); + /* * atrtc_lock protects low-level access to individual hardware registers. * atrtc_time_lock protects the entire sequence of accessing multiple registers @@ -600,6 +605,7 @@ atrtc_gettime(device_t dev, struct timespec *ts) /* Look if we have a RTC present and the time is valid */ if (!(rtcin(RTC_STATUSD) & RTCSD_PWR)) { + atrtc_power_lost = true; device_printf(dev, "WARNING: Battery failure indication\n"); return (EINVAL); }
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