netdev - Re: [PATCH net-next v2] net: phy: mediatek-ge-soc: support PHY LEDs

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Message-ID: <9bae16cd-501e-4fe5-9736-d32d958aec7c@lunn.ch>
Date: Sun, 13 Aug 2023 19:03:21 +0200
From: Andrew Lunn <andrew@...n.ch>
To: Daniel Golle <daniel@...rotopia.org>
Cc: Qingfang Deng <dqfext@...il.com>,
	SkyLake Huang <SkyLake.Huang@...iatek.com>,
	Heiner Kallweit <hkallweit1@...il.com>,
	Russell King <linux@...linux.org.uk>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH net-next v2] net: phy: mediatek-ge-soc: support PHY LEDs

Hi Daniel

> This requires syscon phandle 'mediatek,pio' present in parenting MDIO bus
> which should point to the syscon holding the boottrap register.

If i'm reading the code correct, if this property is missing, the PHY
will fail to probe? Since this was never a mandatory property, it
looks like this will break old DT blobs?

If there are LED properties, then it should be mandatory, otherwise it
should be optional. That way you keep backwards compatibility with old
blobs.

	Andrew