linux-kernel - Re: [net-next RFC PATCH v2 3/3] net: phy: Add Airoha AN8855 Internal Switch Gigabit PHY

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Message-ID: <87aad5ff-4876-4611-8cf8-5c20df3559b3@lunn.ch>
Date: Wed, 23 Oct 2024 18:53:14 +0200
From: Andrew Lunn <andrew@...n.ch>
To: Christian Marangi <ansuelsmth@...il.com>
Cc: Florian Fainelli <f.fainelli@...il.com>,
	Vladimir Oltean <olteanv@...il.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Heiner Kallweit <hkallweit1@...il.com>,
	Russell King <linux@...linux.org.uk>,
	Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org, netdev@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [net-next RFC PATCH v2 3/3] net: phy: Add Airoha AN8855 Internal
 Switch Gigabit PHY

> +	/* Enable Asymmetric Pause Capability */
> +	ret = phy_set_bits(phydev, MII_ADVERTISE, ADVERTISE_PAUSE_ASYM);
> +	if (ret)
> +		return ret;

The PHY driver alone does not decide this. The MAC driver needs to
indicate it supports asym pause by calling phy_supports_asym_pause().

> +
> +	/* Disable EEE */
> +	ret = phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, 0);
> +	if (ret)
> +		return ret;

Again, the core code should handle this, unless EEE is broken and you
need to force it off.

	Andrew