linux-kernel - Re: [PATCH v9 14/27] pwm: jz4740: Improve algorithm of clock calculation

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Date:   Thu, 28 Feb 2019 10:42:32 -0800
From:   Stephen Boyd <sboyd@...nel.org>
To:     Paul Cercueil <paul@...pouillou.net>,
        <u.kleine-koenig@...gutronix.de>
Cc:     Thierry Reding <thierry.reding@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ralf Baechle <ralf@...ux-mips.org>,
        Paul Burton <paul.burton@...s.com>,
        James Hogan <jhogan@...nel.org>,
        Jonathan Corbet <corbet@....net>, linux-pwm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-watchdog@...r.kernel.org, linux-mips@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-clk@...r.kernel.org,
        Russell King <linux@...linux.org.uk>
Subject: Re: [PATCH v9 14/27] pwm: jz4740: Improve algorithm of clock calculation

Quoting Paul Cercueil (2019-02-22 17:17:58)
> Bump.
> 
> What should I do here?
> 

I thought I replied to the list but maybe it got rejected because my MUA
is currently failing hard at sending 8-bit mails without
using quoted printable. Let me remove all non-ascii characters from this
mail!

If someone has the mail please rebounce it to the list. Otherwise, I
think I basically said this is OK because clk_round_rate() semantics are
specifically vague here to allow the implementation to decide how rates
are rounded (up, down, closest, etc). As long as the whole rate space is
searched with a +1 or a -1 style of search it should be work. We're not
going to add round_up() or round_down() APIs as far as I'm concerned,
and you can look on the list to see previous proposals on that topic to
get some background on why they aren't liked.