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From: Heiko =?ISO-8859-1?Q?St=FCbner?= <heiko@sntech.de>
To: Rob Herring <robh@kernel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
 Conor Dooley <conor+dt@kernel.org>,
 =?utf-8?B?QXLEsW7DpyDDnE5BTA==?= <arinc.unal@arinc9.com>
Cc: mithat.guner@xeront.com, erkin.bozoglu@xeront.com,
 devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
 linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org
Subject:
 Re: [PATCH] arm64: dts: rockchip: set PHY address of MT7531 switch to 0x1f
Date: Thu, 14 Mar 2024 14:49:21 +0100
Message-ID: <48986334.fMDQidcC6G@diego>
In-Reply-To: <3eb63e39-c7f2-4411-bb84-e4c152be1f0c@arinc9.com>
References:
 <20240314-for-rockchip-mt7531-phy-address-v1-1-743b5873358f@arinc9.com>
 <4682635.taCxCBeP46@diego> <3eb63e39-c7f2-4411-bb84-e4c152be1f0c@arinc9.com>
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Hey,

Am Donnerstag, 14. M=C3=A4rz 2024, 13:37:19 CET schrieb Ar=C4=B1n=C3=A7 =C3=
=9CNAL:
> Hello Heiko.
>=20
> On 14.03.2024 15:31, Heiko St=C3=BCbner wrote:
> > Am Donnerstag, 14. M=C3=A4rz 2024, 13:24:35 CET schrieb Ar=C4=B1n=C3=A7=
 =C3=9CNAL via B4 Relay:
> >> From: Ar=C4=B1n=C3=A7 =C3=9CNAL <arinc.unal@arinc9.com>
> >>
> >> The MT7531 switch listens on PHY address 0x1f on an MDIO bus. I've got=
 two
> >> findings that support this. There's no bootstrapping option to change =
the
> >> PHY address of the switch. The Linux driver hardcodes 0x1f as the PHY
> >> address of the switch. So the reg property on the device tree is curre=
ntly
> >> ignored by the Linux driver.
> >>
> >> Therefore, describe the correct PHY address on Banana Pi BPI-R2 Pro th=
at
> >> has this switch.
> >>
> >> Signed-off-by: Ar=C4=B1n=C3=A7 =C3=9CNAL <arinc.unal@arinc9.com>
> >=20
> > Fixes: c1804463e5c6 ("arm64: dts: rockchip: Add mt7531 dsa node to BPI-=
R2-Pro board")
>=20
> Do I need to resubmit with this added, or would you add it while applying
> the patch?

nope, all good. b4 am should just pick up this trailer when it downloads
the patch from lore.kernel.org.

That's the reason I added it as a reply, as we're just in the middle of the
merge window right now.

Heiko