linux-kernel - Re: [PATCH v2 2/2] leds: Add support for Turris 1.x LEDs

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Message-ID: <20220705184657.us53ciamy2oygakt@pali>
Date:   Tue, 5 Jul 2022 20:46:57 +0200
From:   Pali Rohár <pali@...nel.org>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     Pavel Machek <pavel@....cz>, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Marek Behún <kabel@...nel.org>,
        Linux LED Subsystem <linux-leds@...r.kernel.org>,
        devicetree <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 2/2] leds: Add support for Turris 1.x LEDs

On Tuesday 05 July 2022 20:40:26 Andy Shevchenko wrote:
> On Tue, Jul 5, 2022 at 6:11 PM Pali Rohár <pali@...nel.org> wrote:
> >
> > This adds support for the RGB LEDs found on the front panel of the
> > Turris 1.x routers. There are 8 RGB LEDs that are controlled by
> > CZ.NIC CPLD firmware running on Lattice FPGA.
> >
> > CPLD firmware provides HW triggering mode for all LEDs except WiFi LED
> > which is automatically enabled after power on reset. LAN LEDs share HW
> > registers for RGB colors settings, so it is not possible to set different
> > colors for individual LAN LEDs.
> >
> > CZ.NIC CPLD firmware is open source and available at:
> > https://gitlab.nic.cz/turris/hw/turris_cpld/-/blob/master/CZ_NIC_Router_CPLD.v
> >
> > This driver uses the multicolor LED framework and HW led triggers.
> 
> Pardon me, but this driver seems like 3 years old by the APIs it's
> using... I have to say this, because I was surprised a lot to see some
> calls.

I wrote it just recently according to other omnia multicolor driver.