linux-kernel - Re: [PATCH v2 2/4] hwmon: (core) Add support for humidity min/max alarm

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Date:   Wed, 15 Nov 2023 05:25:31 -0800
From:   Guenter Roeck <linux@...ck-us.net>
To:     Javier Carrasco <javier.carrasco.cruz@...il.com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Jean Delvare <jdelvare@...e.com>,
        Jonathan Corbet <corbet@....net>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>, Rob Herring <robh@...nel.org>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-hwmon@...r.kernel.org, linux-doc@...r.kernel.org
Subject: Re: [PATCH v2 2/4] hwmon: (core) Add support for humidity min/max
 alarm

On Thu, Nov 09, 2023 at 07:24:00AM +0100, Javier Carrasco wrote:
> Hello,
> 
> On 09.11.23 01:02, Guenter Roeck wrote:
> > On 11/8/23 07:37, Javier Carrasco wrote:
> >> Add min_alarm and max_alarm attributes for humidityX to support devices
> >> that can generate these alarms.
> >> Such attributes already exist for other magnitudes such as tempX.
> >>
> >> Tested with a ChipCap 2 temperature-humidity sensor.
> >>
> > 
> > No objection, but the new attributes also need to be added to the ABI
> > documentation at
> > Documentation/ABI/testing/sysfs-class-hwmon and
> > Documentation/hwmon/sysfs-interface.rst
> > 
> > Which made me notice that humidityX_alarm isn't documented either.
> > Please document that attribute as well while you are at it.
> > 
> > Thanks,
> > Guenter
> > 
> Actually there are several attributes without ABI documentation or at
> least the attributes enum is much larger than the objects in the ABI
> documentation (in testing/sysfs-class-hwmon).
> For humidity there is only input, enable, rated_min and rated_max. Are
> some attributes not described for a good reason or should all be
> documented? the current humidity_attributes contains:
> 
> hwmon_humidity_enable -> documented in sysfs-class-hwmon
> hwmon_humidity_input -> documented in sysfs-class-hwmon
> hwmon_humidity_label
> hwmon_humidity_min
> hwmon_humidity_min_hyst
> hwmon_humidity_max
> hwmon_humidity_max_hyst
> hwmon_humidity_alarm
> hwmon_humidity_fault
> hwmon_humidity_rated_min -> documented in sysfs-class-hwmon
> hwmon_humidity_rated_max -> documented in sysfs-class-hwmon
> 
> I could not find the temperature counterparts of my new additions
> (temp_min_alarm and temp_max_alarm).
> 
> Should all be added to sysfs-class-hwmon or am I missing some other
> document? I am alright adding the ones I mentioned.
> 

They should all be documented. It would be great if you volunteer
to add the missing ones, but that won't be a mandate. I just don't want
the situation to get worse.

Thanks,
Guenter