linux-kernel - Re: [PATCH RCC 1/6] pwm: Add different PWM output types support

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Message-ID: <20200727214649.GA32280@codeaurora.org>
Date:   Mon, 27 Jul 2020 14:46:49 -0700
From:   Guru Das Srinagesh <gurus@...eaurora.org>
To:     Martin Botka <martin.botka1@...il.com>
Cc:     Fenglin Wu <fenglinw@...eaurora.org>,
        Konrad Dybcio <konradybcio@...il.com>,
        Jacek Anaszewski <jacek.anaszewski@...il.com>,
        Pavel Machek <pavel@....cz>, Dan Murphy <dmurphy@...com>,
        Rob Herring <robh+dt@...nel.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>, Lee Jones <lee.jones@...aro.org>,
        linux-leds@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-pwm@...r.kernel.org
Subject: Re: [PATCH RCC 1/6] pwm: Add different PWM output types support

On Fri, Jul 24, 2020 at 11:36:51PM +0200, Martin Botka wrote:
> From: Fenglin Wu <fenglinw@...eaurora.org>
> 
> Normally, PWM channel has fixed output until software request to change
> its settings. There are some PWM devices which their outputs could be
> changed autonomously according to a predefined pattern programmed in
> hardware. Add pwm_output_type enum type to identify these two different
> PWM types and add relevant helper functions to set and get PWM output
> types and pattern.
> 
> Signed-off-by: Fenglin Wu <fenglinw@...eaurora.org>
> [konradybcio@...il.com: Fast-forward from kernel 4.14 to 5.8]
> Signed-off-by: Konrad Dybcio <konradybcio@...il.com>
> Signed-off-by: Martin Botka <martin.botka1@...il.com>

Hello,

Re-sending my reply as somehow the cc-fields got dropped when I posted
earlier.

This was the feedback received from the maintainers when I posted this
patch last year [1]. Accordingly, we updated the patch to drop
"output_pattern" altogether and made "output_type" read-only [2] -
haven't attempted upstreaming this version yet.

[1]: https://lore.kernel.org/lkml/20190916140146.GC7488@ulmo/
[2]: https://android-review.googlesource.com/c/kernel/common/+/1170135

Thank you.

Guru Das.