From: Richard Cochran <richardcochran@gmail.com>
To: Grygorii Strashko <grygorii.strashko@ti.com>
Cc: "David S. Miller" <davem@davemloft.net>,
netdev@vger.kernel.org, Mugunthan V N <mugunthanvnm@ti.com>,
Sekhar Nori <nsekhar@ti.com>,
linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org,
Rob Herring <robh+dt@kernel.org>,
devicetree@vger.kernel.org,
Murali Karicheri <m-karicheri2@ti.com>,
Wingman Kwok <w-kwok2@ti.com>,
John Stultz <john.stultz@linaro.org>,
Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [PATCH v2 13/13] net: ethernet: ti: cpts: fix overflow check period
Date: Wed, 30 Nov 2016 10:12:58 +0100 [thread overview]
Message-ID: <20161130091258.GA28680@localhost.localdomain> (raw)
In-Reply-To: <20161128230337.6731-14-grygorii.strashko@ti.com>
On Mon, Nov 28, 2016 at 05:03:37PM -0600, Grygorii Strashko wrote:
> The CPTS drivers uses 8sec period for overflow checking with
> assumption that CPTS retclk will not exceed 500MHz. But that's not
> true on some TI platforms (Kesytone 2). As result, it is possible that
> CPTS counter will overflow more than once between two readings.
>
> Hence, fix it by selecting overflow check period dynamically as
> max_sec_before_overflow/2, where
> max_sec_before_overflow = max_counter_val / rftclk_freq.
>
> Cc: John Stultz <john.stultz@linaro.org>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
prev parent reply other threads:[~2016-11-30 9:12 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-28 23:03 [PATCH v2 00/13] net: ethernet: ti: cpts: update and fixes Grygorii Strashko
2016-11-28 23:03 ` [PATCH v2 01/13] net: ethernet: ti: cpts: switch to readl/writel_relaxed() Grygorii Strashko
2016-11-29 9:38 ` Richard Cochran
2016-11-28 23:03 ` [PATCH v2 03/13] net: ethernet: ti: cpsw: minimize direct access to struct cpts Grygorii Strashko
2016-11-28 23:03 ` [PATCH v2 04/13] net: ethernet: ti: cpts: fix unbalanced clk api usage in cpts_register/unregister Grygorii Strashko
[not found] ` <20161128230337.6731-5-grygorii.strashko-l0cyMroinI0@public.gmane.org>
2016-11-29 9:48 ` Richard Cochran
[not found] ` <20161128230337.6731-1-grygorii.strashko-l0cyMroinI0@public.gmane.org>
2016-11-28 23:03 ` [PATCH v2 02/13] net: ethernet: ti: allow cpts to be built separately Grygorii Strashko
2016-11-29 9:37 ` Richard Cochran
2016-11-28 23:03 ` [PATCH v2 05/13] net: ethernet: ti: cpts: fix registration order Grygorii Strashko
[not found] ` <20161128230337.6731-6-grygorii.strashko-l0cyMroinI0@public.gmane.org>
2016-11-29 9:48 ` Richard Cochran
2016-11-28 23:03 ` [PATCH v2 08/13] net: ethernet: ti: cpts: move dt props parsing to cpts driver Grygorii Strashko
2016-11-29 10:11 ` Richard Cochran
2016-11-29 15:54 ` Grygorii Strashko
2016-11-28 23:03 ` [PATCH v2 10/13] net: ethernet: ti: cpts: drop excessive writes to CTRL and INT_EN regs Grygorii Strashko
[not found] ` <20161128230337.6731-11-grygorii.strashko-l0cyMroinI0@public.gmane.org>
2016-11-29 10:14 ` Richard Cochran
2016-11-28 23:03 ` [PATCH v2 11/13] clocksource: export the clocks_calc_mult_shift to use by timestamp code Grygorii Strashko
[not found] ` <20161128230337.6731-12-grygorii.strashko-l0cyMroinI0@public.gmane.org>
2016-11-29 9:08 ` Thomas Gleixner
2016-11-28 23:03 ` [PATCH v2 12/13] net: ethernet: ti: cpts: calc mult and shift from refclk freq Grygorii Strashko
[not found] ` <20161128230337.6731-13-grygorii.strashko-l0cyMroinI0@public.gmane.org>
2016-11-29 10:34 ` Richard Cochran
2016-11-29 16:22 ` Grygorii Strashko
2016-11-28 23:03 ` [PATCH v2 06/13] net: ethernet: ti: cpts: disable cpts when unregistered Grygorii Strashko
[not found] ` <20161128230337.6731-7-grygorii.strashko-l0cyMroinI0@public.gmane.org>
2016-11-29 9:49 ` Richard Cochran
2016-11-28 23:03 ` [PATCH v2 07/13] net: ethernet: ti: cpts: rework initialization/deinitialization Grygorii Strashko
[not found] ` <20161128230337.6731-8-grygorii.strashko-l0cyMroinI0@public.gmane.org>
2016-11-29 10:07 ` Richard Cochran
[not found] ` <20161129100737.GF3110-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
2016-11-29 15:50 ` Grygorii Strashko
[not found] ` <2037427d-0ab6-9446-450d-21c34123c03b-l0cyMroinI0@public.gmane.org>
2016-11-30 18:30 ` Grygorii Strashko
2016-11-28 23:03 ` [PATCH v2 09/13] net: ethernet: ti: cpts: clean up event list if event pool is empty Grygorii Strashko
2016-11-29 10:13 ` Richard Cochran
2016-11-28 23:03 ` [PATCH v2 13/13] net: ethernet: ti: cpts: fix overflow check period Grygorii Strashko
2016-11-30 9:12 ` Richard Cochran [this message]
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