linux-kernel - Re: [PATCH 05/10] hwmon: generic-pwm-tachometer: Add generic PWM based tachometer

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Message-ID: <4d00a31b-44cc-d3dc-78a2-1b7f23d777e0@nvidia.com>
Date:   Thu, 8 Mar 2018 20:51:07 +0530
From:   Laxman Dewangan <ldewangan@...dia.com>
To:     Guenter Roeck <linux@...ck-us.net>,
        Rajkumar Rampelli <rrajk@...dia.com>,
        Mikko Perttunen <cyndis@...si.fi>, <robh+dt@...nel.org>,
        <mark.rutland@....com>, <thierry.reding@...il.com>,
        <jonathanh@...dia.com>, <jdelvare@...e.com>, <corbet@....net>,
        <catalin.marinas@....com>, <will.deacon@....com>,
        <kstewart@...uxfoundation.org>, <gregkh@...uxfoundation.org>,
        <pombredanne@...b.com>, <mmaddireddy@...dia.com>,
        <mperttunen@...dia.com>, <arnd@...db.de>, <timur@...eaurora.org>,
        <andy.gross@...aro.org>, <xuwei5@...ilicon.com>,
        <elder@...aro.org>, <heiko@...ech.de>, <krzk@...nel.org>,
        <ard.biesheuvel@...aro.org>
CC:     <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-pwm@...r.kernel.org>, <linux-tegra@...r.kernel.org>,
        <linux-hwmon@...r.kernel.org>, <linux-doc@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 05/10] hwmon: generic-pwm-tachometer: Add generic PWM
 based tachometer



On Thursday 08 March 2018 08:01 PM, Guenter Roeck wrote:
> On 03/07/2018 10:06 PM, Laxman Dewangan wrote:
>>
>>
>> The RPM is measured speed via PWM signal capture  which is output 
>> from fan.
>> So should we have the fan[1..n]_output_rpm?
>>
>
> No. I hear you clearly that you for some reason dislike fan[1..n]_input.
> While ABIs are not always to our liking, that doesn't mean that we get
> to change them at our whim. If that is not acceptable for you, I can't
> help you. And you can't change inX_input to inX_voltage either, sorry.

My opinion is only to not use "input" as this is not really the input to 
fan.