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From: Erez Geva <erez.geva.ext@siemens.com>
To: linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
	Cong Wang <xiyou.wangcong@gmail.com>,
	"David S . Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>,
	Jamal Hadi Salim <jhs@mojatatu.com>,
	Jiri Pirko <jiri@resnulli.us>, Andrei Vagin <avagin@gmail.com>,
	Dmitry Safonov <0x7f454c46@gmail.com>,
	"Eric W . Biederman" <ebiederm@xmission.com>,
	Ingo Molnar <mingo@kernel.org>,
	John Stultz <john.stultz@linaro.org>,
	Michal Kubecek <mkubecek@suse.cz>,
	Oleg Nesterov <oleg@redhat.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Richard Cochran <richardcochran@gmail.com>,
	Stephen Boyd <sboyd@kernel.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Vladis Dronov <vdronov@redhat.com>,
	Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
	Frederic Weisbecker <frederic@kernel.org>,
	Eric Dumazet <edumazet@google.com>
Cc: Jesus Sanchez-Palencia <jesus.sanchez-palencia@intel.com>,
	Vinicius Costa Gomes <vinicius.gomes@intel.com>,
	Vedang Patel <vedang.patel@intel.com>,
	Simon Sudler <simon.sudler@siemens.com>,
	Andreas Meisinger <andreas.meisinger@siemens.com>,
	Andreas Bucher <andreas.bucher@siemens.com>,
	Henning Schild <henning.schild@siemens.com>,
	Jan Kiszka <jan.kiszka@siemens.com>,
	Andreas Zirkler <andreas.zirkler@siemens.com>,
	Ermin Sakic <ermin.sakic@siemens.com>,
	An Ninh Nguyen <anninh.nguyen@siemens.com>,
	Michael Saenger <michael.saenger@siemens.com>,
	Bernd Maehringer <bernd.maehringer@siemens.com>,
	Gisela Greinert <gisela.greinert@siemens.com>,
	Erez Geva <erez.geva.ext@siemens.com>,
	Erez Geva <ErezGeva2@gmail.com>
Subject: [PATCH 2/7] Function to retrieve main clock state
Date: Thu,  1 Oct 2020 22:51:36 +0200	[thread overview]
Message-ID: <20201001205141.8885-3-erez.geva.ext@siemens.com> (raw)
In-Reply-To: <20201001205141.8885-1-erez.geva.ext@siemens.com>

Add kernel function to retrieve main clock oscillator state.
As calibration is done from user space daemon,
the kernel access function permit read only.

Signed-off-by: Erez Geva <erez.geva.ext@siemens.com>
---
 include/linux/timex.h     | 1 +
 kernel/time/timekeeping.c | 9 +++++++++
 2 files changed, 10 insertions(+)

diff --git a/include/linux/timex.h b/include/linux/timex.h
index ce0859763670..03bc63bf3073 100644
--- a/include/linux/timex.h
+++ b/include/linux/timex.h
@@ -153,6 +153,7 @@ extern unsigned long tick_nsec;		/* SHIFTED_HZ period (nsec) */
 
 extern int do_adjtimex(struct __kernel_timex *);
 extern int do_clock_adjtime(const clockid_t which_clock, struct __kernel_timex * ktx);
+extern int adjtimex(struct __kernel_timex *txc);
 
 extern void hardpps(const struct timespec64 *, const struct timespec64 *);
 
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index 4c47f388a83f..2248fa257ff8 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -2372,6 +2372,15 @@ int do_adjtimex(struct __kernel_timex *txc)
 	return ret;
 }
 
+int adjtimex(struct __kernel_timex *txc)
+{
+	if (txc->modes != 0)
+		return -EINVAL;
+
+	return do_adjtimex(txc);
+}
+EXPORT_SYMBOL_GPL(adjtimex);
+
 #ifdef CONFIG_NTP_PPS
 /**
  * hardpps() - Accessor function to NTP __hardpps function
-- 
2.20.1


  parent reply	other threads:[~2020-10-01 21:01 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-01 20:51 [PATCH 0/7] TC-ETF support PTP clocks series Erez Geva
2020-10-01 20:51 ` [PATCH 1/7] POSIX clock ID check function Erez Geva
2020-10-01 21:56   ` Thomas Gleixner
2020-10-01 20:51 ` Erez Geva [this message]
2020-10-01 22:05   ` [PATCH 2/7] Function to retrieve main clock state Thomas Gleixner
2020-10-02  0:19     ` Thomas Gleixner
2020-10-01 20:51 ` [PATCH 3/7] Functions to fetch POSIX dynamic clock object Erez Geva
2020-10-01 23:35   ` Thomas Gleixner
2020-10-01 20:51 ` [PATCH 4/7] Fix qdisc_watchdog_schedule_range_ns range check Erez Geva
2020-10-01 22:44   ` Thomas Gleixner
2020-10-01 20:51 ` [PATCH 5/7] Traffic control using high-resolution timer issue Erez Geva
2020-10-01 23:07   ` Thomas Gleixner
2020-10-01 20:51 ` [PATCH 6/7] TC-ETF code improvements Erez Geva
2020-10-01 20:51 ` [PATCH 7/7] TC-ETF support PTP clocks Erez Geva
2020-10-02  0:33   ` Thomas Gleixner
2020-10-02 11:05     ` Geva, Erez
2020-10-02 19:01 ` [PATCH 0/7] TC-ETF support PTP clocks series Vinicius Costa Gomes
2020-10-02 19:56   ` Geva, Erez
2020-10-03  0:10   ` Thomas Gleixner
2020-10-09 11:17     ` AW: " Meisinger, Andreas
2020-10-09 15:39       ` Thomas Gleixner

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