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From: Andrew Lunn <andrew@lunn.ch>
To: Andre Przywara <andre.przywara@arm.com>
Cc: Andrew Lunn <andrew+netdev@lunn.ch>,
	"David S . Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
	Rob Herring <robh@kernel.org>,
	Krzysztof Kozlowski <krzk+dt@kernel.org>,
	Conor Dooley <conor+dt@kernel.org>,
	Chen-Yu Tsai <wens@kernel.org>,
	Jernej Skrabec <jernej.skrabec@gmail.com>,
	Samuel Holland <samuel@sholland.org>,
	Heiner Kallweit <hkallweit1@gmail.com>,
	Russell King <linux@armlinux.org.uk>,
	Liu Changjie <liucj1228@outlook.com>,
	netdev@vger.kernel.org, devicetree@vger.kernel.org,
	linux-sunxi@lists.linux.dev,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 2/6] net: phy: maxio: parse and enable PHY clock from generic DT binding
Date: Tue, 4 Aug 2026 04:43:50 +0200	[thread overview]
Message-ID: <e27ef42e-a140-4501-b1a8-f1c728eb2ecc@lunn.ch> (raw)
In-Reply-To: <20260803101452.2993721-3-andre.przywara@arm.com>

On Mon, Aug 03, 2026 at 12:14:48PM +0200, Andre Przywara wrote:
> The generic PHY DT binding features a clocks property, which describes
> the clock input to the PHY. Typically this is a crystal oscillator, so
> it works without software interaction. But some boards want to save some
> pennies on that part, and let a clock fanout pin from the SoC provide this
> clock signal. In this case the PHY probe routine needs to enable this
> clock explicitly.
> 
> Look for a "clocks" property inside the PHY node and enable that clock,
> if one is provided.
> 
> This allows boards with a SoC-driven PHY clock to use the PHY. Please
> note that without the clock enabled, the PHY will not be detected on the
> MDIO bus, so the PHY-ID needs to be explicitly named in the PHY
> compatible string:
> 	compatible = "ethernet-phy-id7b74.4411";
> 
> Signed-off-by: Andre Przywara <andre.przywara@arm.com>

Reviewed-by: Andrew Lunn <andrew@lunn.ch>

    Andrew


  reply	other threads:[~2026-08-04  2:44 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-08-03 10:14 [PATCH 0/6] sunxi: net: add Ethernet support for X96QPro+ Andre Przywara
2026-08-03 10:14 ` [PATCH 1/6] net: phy: maxio: prepare for more DT properties Andre Przywara
2026-08-04  2:42   ` Andrew Lunn
2026-08-03 10:14 ` [PATCH 2/6] net: phy: maxio: parse and enable PHY clock from generic DT binding Andre Przywara
2026-08-04  2:43   ` Andrew Lunn [this message]
2026-08-03 10:14 ` [PATCH 3/6] dt-bindings: net: Maxio PHY: add PHY-ID for -Q2C variant Andre Przywara
2026-08-03 10:14 ` [PATCH 4/6] net: phy: maxio: extend PHY ID matching Andre Przywara
2026-08-03 14:59   ` Per Larsson
2026-08-04  2:49   ` Andrew Lunn
2026-08-03 10:14 ` [PATCH 5/6] arm64: dts: allwinner: a523: add EPHY 25MHz clock fanout pins Andre Przywara
2026-08-03 10:14 ` [PATCH 6/6] arm64: dts: allwinner: a523: x96qpro+: enable Ethernet support Andre Przywara
2026-08-04  2:53   ` Andrew Lunn
2026-08-04  3:11     ` Chen-Yu Tsai
2026-08-04 14:44       ` Andrew Lunn

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