netdev - Re: [PATCH v1 2/3] net: stmmac: dwmac-sun8i: Allow runtime AC200/AC300 phy selection

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <a2ac65eb-e240-48f1-b787-c57b5f3ce135@lunn.ch>
Date: Mon, 26 May 2025 21:55:51 +0200
From: Andrew Lunn <andrew@...n.ch>
To: James Hilliard <james.hilliard1@...il.com>
Cc: netdev@...r.kernel.org, linux-sunxi@...ts.linux.dev,
	Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Chen-Yu Tsai <wens@...e.org>,
	Jernej Skrabec <jernej.skrabec@...il.com>,
	Samuel Holland <samuel@...lland.org>,
	Maxime Coquelin <mcoquelin.stm32@...il.com>,
	Alexandre Torgue <alexandre.torgue@...s.st.com>,
	Serge Semin <fancer.lancer@...il.com>,
	Feiyang Chen <chenfeiyang@...ngson.cn>,
	Yanteng Si <si.yanteng@...ux.dev>,
	Uwe Kleine-König <u.kleine-koenig@...libre.com>,
	Jinjie Ruan <ruanjinjie@...wei.com>,
	Paul Kocialkowski <paulk@...-base.io>,
	"Russell King (Oracle)" <rmk+kernel@...linux.org.uk>,
	linux-arm-kernel@...ts.infradead.org,
	linux-stm32@...md-mailman.stormreply.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 2/3] net: stmmac: dwmac-sun8i: Allow runtime
 AC200/AC300 phy selection

On Mon, May 26, 2025 at 12:29:35PM -0600, James Hilliard wrote:
> The Allwinner H616 ships with two different on-die phy variants, in
> order to determine the phy being used we need to read an efuse and
> then select the appropriate PHY based on the AC300 bit.
> 
> By defining an emac node without a phy-handle we can override the
> default PHY selection logic in stmmac by passing a specific phy_node
> selected based on the ac200 and ac300 names in a phys list.

The normal way to do this is phy_find_first().

    Andrew