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

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Message-ID: <CAAd53p6rW7PcugY7okKsXybK2O=pS8qAhctMzsa-MEgJrKhEdg@mail.gmail.com>
Date:   Fri, 14 Jan 2022 14:47:47 +0800
From:   Kai-Heng Feng <kai.heng.feng@...onical.com>
To:     Jakub Kicinski <kuba@...nel.org>
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, Jan 14, 2022 at 12:35 PM Jakub Kicinski <kuba@...nel.org> wrote:
>
> On Fri, 14 Jan 2022 12:07:54 +0800 Kai-Heng Feng wrote:
> > BIOS on Dell Edge Gateway 3200 already makes its own phy LED setting, so
> > instead of setting another value, keep it untouched and restore the saved
> > value on system resume.
> >
> > Signed-off-by: Kai-Heng Feng <kai.heng.feng@...onical.com>
>
> I defer to PHY experts for review. 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?

>
>
> Once you get some reviews please wait for net-next to open:
>
> http://vger.kernel.org/~davem/net-next.html
>
> and repost. It should happen the week of Jan 24th. When you repost
> please drop the first patch, I believe Russell does not like the BIT()
> macro, his opinion overrides checkpatch.

Of course. I'll wait for the review and resubmit the 2nd patch.

Kai-Heng

>
> Thanks!