linux-kernel - Re: [PATCH v2 2/4] leds: simatic-ipc-leds: add new driver for Siemens Industial PCs

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Date:   Sat, 27 Mar 2021 10:46:10 +0100
From:   Henning Schild <henning.schild@...mens.com>
To:     "Enrico Weigelt, metux IT consult" <lkml@...ux.net>
Cc:     Pavel Machek <pavel@....cz>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux LED Subsystem <linux-leds@...r.kernel.org>,
        Platform Driver <platform-driver-x86@...r.kernel.org>,
        <linux-watchdog@...r.kernel.org>,
        Srikanth Krishnakar <skrishnakar@...il.com>,
        Jan Kiszka <jan.kiszka@...mens.com>,
        Gerd Haeussler <gerd.haeussler.ext@...mens.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Mark Gross <mgross@...ux.intel.com>,
        Hans de Goede <hdegoede@...hat.com>
Subject: Re: [PATCH v2 2/4] leds: simatic-ipc-leds: add new driver for
 Siemens Industial PCs

Am Thu, 18 Mar 2021 12:38:53 +0100
schrieb "Enrico Weigelt, metux IT consult" <lkml@...ux.net>:

> On 15.03.21 12:19, Pavel Machek wrote:
> 
> > But I still don't like the naming. simantic-ipc: prefix is
> > useless. Having 6 status leds is not good, either.  
> 
> Do we have some standard naming policy those kinds of LEDs ?

There is include/dt-bindings/leds/common.h with LED_FUNCTION_*

> In this case, they seem to be assigned to certain specific functions
> (by physical labels on the box), so IMHO the LED names should reflect
> that in some ways.

The choice for "status" was because of

>> /* Miscelleaus functions. Use functions above if you can. */

And those known names do not really come with an explanation of their
meaning. Names like "bluetooth" seem obvious, but "activity" or
"indicator" leave a lot of room for speculation.

The choice in numbers was inspired by labels on the box, which i wanted
to reflect in some way.

Henning

> There're other cases (eg. apu board familiy) that just have several
> front panel leds w/o any dedication, so we can just count them up.
> 
> 
> --mtx
>