linux-kernel - Re: [PATCH net-next + leds v2 6/7] net: phy: marvell: add support for LEDs controlled by Marvell PHYs

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Message-ID: <20200910214454.GE1551@shell.armlinux.org.uk>
Date:   Thu, 10 Sep 2020 22:44:54 +0100
From:   Russell King - ARM Linux admin <linux@...linux.org.uk>
To:     Marek Behun <marek.behun@....cz>
Cc:     Andrew Lunn <andrew@...n.ch>, Pavel Machek <pavel@....cz>,
        netdev@...r.kernel.org, linux-leds@...r.kernel.org,
        Dan Murphy <dmurphy@...com>,
        Ondřej Jirman <megous@...ous.com>,
        linux-kernel@...r.kernel.org,
        Matthias Schiffer <matthias.schiffer@...tq-group.com>,
        "David S. Miller" <davem@...emloft.net>
Subject: Re: [PATCH net-next + leds v2 6/7] net: phy: marvell: add support
 for LEDs controlled by Marvell PHYs

On Thu, Sep 10, 2020 at 10:31:12PM +0200, Marek Behun wrote:
> On Thu, 10 Sep 2020 19:34:35 +0100
> Russell King - ARM Linux admin <linux@...linux.org.uk> wrote:
> 
> > On Thu, Sep 10, 2020 at 08:31:54PM +0200, Andrew Lunn wrote:
> > > Generally the driver will default to the hardware reset blink
> > > pattern. There are a few PHY drivers which change this at probe, but
> > > not many. The silicon defaults are pretty good.  
> > 
> > The "right" blink pattern can be a matter of how the hardware is
> > wired.  For example, if you have bi-colour LEDs and the PHY supports
> > special bi-colour mixing modes.
> > 
> 
> Have you seen such, Russell? This could be achieved via the multicolor
> LED framework, but I don't have a device which uses such LEDs, so I
> did not write support for this in the Marvell PHY driver.
> 
> (I guess I could test it though, since on my device LED0 and LED1
> are used, and this to can be put into bi-colour LED mode.)

I haven't, much to my dismay. The Macchiatobin would have been ideal -
the 10G RJ45s have bi-colour on one side and green on the other. It
would have been useful if they were wired to support the PHYs bi-
colour mode.

-- 
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