linux-kernel - Re: [PATCH leds v1 10/10] leds: ns2: refactor and use struct led_init

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Message-ID: <20200921125343.GA4828@kw.sim.vm.gnt>
Date:   Mon, 21 Sep 2020 14:53:43 +0200
From:   Simon Guinot <simon.guinot@...uanux.org>
To:     Marek Behun <marek.behun@....cz>
Cc:     linux-leds@...r.kernel.org, Pavel Machek <pavel@....cz>,
        Dan Murphy <dmurphy@...com>,
        Ondřej Jirman <megous@...ous.com>,
        linux-kernel@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
        devicetree@...r.kernel.org, Simon Guinot <sguinot@...ie.com>,
        Vincent Donnefort <vdonnefort@...il.com>,
        Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
        Linus Walleij <linus.walleij@...aro.org>
Subject: Re: [PATCH leds v1 10/10] leds: ns2: refactor and use struct
 led_init_data

On Fri, Sep 18, 2020 at 07:14:05PM +0200, Marek Behun wrote:
> On Fri, 18 Sep 2020 15:02:06 +0200
> Simon Guinot <simon.guinot@...uanux.org> wrote:
> 
> > On Thu, Sep 17, 2020 at 01:16:50AM +0200, Marek Behún wrote:
> > 
> > Hi Marek,
> > 
> > > By using struct led_init_data when registering we do not need to parse
> > > `label` DT property nor `linux,default-trigger` property.
> > > 
> > > Also, move forward from platform data to device tree only:
> > > since commit c7896490dd1a ("leds: ns2: Absorb platform data") the
> > > platform data structure is absorbed into the driver, because nothing
> > > else in the source tree used it. Since nobody complained and all usage  
> > 
> > Well, I probably should have...
> > 
> > I am using this driver on the Seagate Superbee NAS devices. This devices
> > are based on a x86 SoC. Since I have been unable to get from the ODM the
> > LED information written in the ACPI tables, then platform data are used
> > to pass the LED description to the driver.
> > 
> > The support of this boards is not available mainline yet but it is still
> > on my todo list. So that's why I am complaining right now :) If it is
> > not too much trouble I'd like to keep platform data support in this
> > driver.
> > 
> > Thanks in advance.
> > 
> > Simon
> > 
> 
> Simon, what if we refactored the driver to use fwnode API instead of OF
> API? Then if it is impossible for you to write DTS for that device,
> instead of platform data you could implement your device via swnode
> fwnodes. :)

Yes. That would be perfect.

Simon

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