linux-kernel - Re: [PATCH] clockevents/drivers/dw_apb: set ->min_delta_ticks and ->max_delta

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Message-ID: <20170407132013.GE2078@mai>
Date:   Fri, 7 Apr 2017 15:20:13 +0200
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     Nicolai Stange <nicstange@...il.com>
Cc:     John Stultz <john.stultz@...aro.org>, linux-kernel@...r.kernel.org,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH] clockevents/drivers/dw_apb: set ->min_delta_ticks and
 ->max_delta_ticks

On Thu, Mar 30, 2017 at 10:07:49PM +0200, Nicolai Stange wrote:
> In preparation for making the clockevents core NTP correction aware,
> all clockevent device drivers must set ->min_delta_ticks and
> ->max_delta_ticks rather than ->min_delta_ns and ->max_delta_ns: a
> clockevent device's rate is going to change dynamically and thus, the
> ratio of ns to ticks ceases to stay invariant.
> 
> Make the dw_apb clockevent driver initialize these fields properly.
> 
> This patch alone doesn't introduce any change in functionality as the
> clockevents core still looks exclusively at the (untouched) ->min_delta_ns
> and ->max_delta_ns. As soon as this has changed, a followup patch will
> purge the initialization of ->min_delta_ns and ->max_delta_ns from this
> driver.
> 
> Signed-off-by: Nicolai Stange <nicstange@...il.com>

Acked-by: Daniel Lezcano <daniel.lezcano@...aro.org>

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