linux-kernel - Re: [PATCH 2/2] stmmac: intel: Honor phy LED set by system firmware on a Dell hardware

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Date:   Fri, 14 Jan 2022 08:23:08 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     Kai-Heng Feng <kai.heng.feng@...onical.com>
Cc:     peppe.cavallaro@...com, alexandre.torgue@...s.st.com,
        joabreu@...opsys.com, "David S. Miller" <davem@...emloft.net>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        Marek Behún <kabel@...nel.org>,
        Ivan Bornyakov <i.bornyakov@...rotek.ru>,
        Pali Rohár <pali@...nel.org>,
        netdev@...r.kernel.org, linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] stmmac: intel: Honor phy LED set by system firmware
 on a Dell hardware

On Fri, 14 Jan 2022 14:47:47 +0800 Kai-Heng Feng wrote:
> > Coincidentally the first Marvell flag appears dead, nobody sets it:
> >
> > $ git grep MARVELL_PHY_M1145_FLAGS_RESISTANCE
> > drivers/net/phy/marvell.c:      if (phydev->dev_flags & MARVELL_PHY_M1145_FLAGS_RESISTANCE) {
> > include/linux/marvell_phy.h:#define MARVELL_PHY_M1145_FLAGS_RESISTANCE  0x00000001
> > $
> >
> > unless it's read from DT under different name or something.  
> 
> It was introduced by 95d21ff4c645 without any user. Should we keep it?

Not unless someone explains that it's actually used somehow.

Please post a patch once net-next opens.