linux-kernel - Re: [PATCH 0/3] add dt configuration for dp83867 led modes

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Date:   Thu, 1 Dec 2022 10:35:46 -0800
From:   Tim Harvey <tharvey@...eworks.com>
To:     Christian Marangi <ansuelsmth@...il.com>
Cc:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        devicetree@...r.kernel.org, netdev@...r.kernel.org,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Andrew Lunn <andrew@...n.ch>
Subject: Re: [PATCH 0/3] add dt configuration for dp83867 led modes

On Thu, Dec 1, 2022 at 10:31 AM Christian Marangi <ansuelsmth@...il.com> wrote:
>
> On Thu, Dec 01, 2022 at 10:26:09AM -0800, Tim Harvey wrote:
> > On Sun, Nov 20, 2022 at 3:35 PM Andrew Lunn <andrew@...n.ch> wrote:
> > >
> > > On Fri, Nov 18, 2022 at 11:57:00AM -0800, Tim Harvey wrote:
> > > > On Fri, Nov 18, 2022 at 5:11 AM Andrew Lunn <andrew@...n.ch> wrote:
> > > > >
> > > > > > Andrew,
> > > > > >
> > > > > > I completely agree with you but I haven't seen how that can be done
> > > > > > yet. What support exists for a PHY driver to expose their LED
> > > > > > configuration to be used that way? Can you point me to an example?
> > > > >
> > > > > Nobody has actually worked on this long enough to get code merged. e.g.
> > > > > https://lore.kernel.org/netdev/20201004095852.GB1104@bug/T/
> > > > > https://lists.archive.carbon60.com/linux/kernel/3396223
> > > > >
> > > > > This is probably the last attempt, which was not too far away from getting merged:
> > > > > https://patches.linaro.org/project/linux-leds/cover/20220503151633.18760-1-ansuelsmth@gmail.com/
> > > > >
> > > > > I seem to NACK a patch like yours every couple of months. If all that
> > > > > wasted time was actually spent on a common framework, this would of
> > > > > been solved years ago.
> > > > >
> > > > > How important is it to you to control these LEDs? Enough to finish
> > > > > this code and get it merged?
> > > > >
> > > >
> > > > Andrew,
> > > >
> > > > Thanks for the links - the most recent attempt does look promising.
> > > > For whatever reason I don't have that series in my mail history so
> > > > it's not clear how I can respond to it.
> > >
> > > apt-get install b4
> > >
> > > > Ansuel, are you planning on posting a v7 of 'Adds support for PHY LEDs
> > > > with offload triggers' [1]?
> > > >
> > > > I'm not all that familiar with netdev led triggers. Is there a way to
> > > > configure the default offload blink mode via dt with your series? I
> > > > didn't quite follow how the offload function/blink-mode gets set.
> > >
> > > The idea is that the PHY LEDs are just LEDs in the Linux LED
> > > framework. So read Documentation/devicetree/bindings/leds/common.yaml.
> > > The PHY should make use of these standard DT properties, including
> > > linux,default-trigger.
> > >
> > >         Andrew
> >
> > Ansuel,
> >
> > Are you planning on posting a v7 of 'Adds support for PHY LEDs with
> > offload triggers' [1]?
> >
> > Best Regards,
> >
> > Tim
> > [1] https://patches.linaro.org/project/linux-leds/list/?series=174704
>
> I can consider that only if there is a real interest for it and would
> love some help by the netdev team to actually have a review from the
> leds team...
>
> I tried multiple time to propose it but I never got a review... only a
> review from an external guy that wanted to follow his idea in every way
> possible with the only intention of applying his code (sorry to be rude
> about that but i'm more than happy to recover the work and search for a
> common solution)
>
> So yes this is still in my TODO list but it would help if others can
> tell me that they want to actually review it. That would put that
> project on priority and I would recover and push a v7.
>
> --
>         Ansuel

Ansuel,

Considering Andrew is nak'ing any phy code to configure LED's until a
solution using via /sys/class/leds is provided I would say there is
real interest.

It seems to me that you got very positive feedback for this last
series. I would think if you submitted without RFC it would catch more
eyes as well.

Best Regards,

Tim