linux-kernel - Re: [PATCH v9 1/2] dt-bindings: leds: Add Qualcomm Light Pulse Generator binding

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Date:   Fri, 25 Jun 2021 10:39:32 +0200
From:   Alexander Dahl <ada@...rsis.com>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     Marek Behun <marek.behun@....cz>, Pavel Machek <pavel@....cz>,
        Rob Herring <robh+dt@...nel.org>,
        Andy Gross <agross@...nel.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Uwe Kleine-K?nig <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-arm-msm@...r.kernel.org, linux-pwm@...r.kernel.org,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        Yassine Oudjana <y.oudjana@...tonmail.com>,
        Luca Weiss <luca@...tu.xyz>,
        Subbaraman Narayanamurthy <subbaram@...eaurora.org>
Subject: Re: [PATCH v9 1/2] dt-bindings: leds: Add Qualcomm Light Pulse
 Generator binding

Hello Bjorn,

Am Thu, Jun 24, 2021 at 06:44:54PM -0500 schrieb Bjorn Andersson:
> On Thu 24 Jun 18:19 CDT 2021, Marek Behun wrote:
> > please don't use in new bindings in examples.
> > Instead use color, function and function-enumerator, i.e.
> > 
> >   color = <LED_COLOR_ID_GREEN>;
> >   function = LED_FUNCTION_xxx;
> >   function-enumerator = <N>;
> > 
> 
> Can you point me to something helping me regarding what "function" to
> use?
> 
> For this particular devboard that the example comes from I have 4 LEDs
> that are named "user1", "user2", "user3" and "user4" in the board
> documentation. I can make up whatever for the example, but I would like
> to get the following dts additions follow the expected guidelines.

I asked myself the same question in the past.  The wohle list is in
'include/dt-bindings/leds/common.h' and I in my personal project I
opted for LED_FUNCTION_INDICATOR, but yes, the confusion is real.

Greets
Alex