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From: Yongzhao Chen <yongzhao.derek@gmail.com>
To: Andrew Lunn <andrew@lunn.ch>
Cc: netdev@vger.kernel.org, Vladimir Oltean <olteanv@gmail.com>,
	Christian Marangi <ansuelsmth@gmail.com>,
	Heiner Kallweit <hkallweit1@gmail.com>,
	Russell King <linux@armlinux.org.uk>,
	Florian Fainelli <florian.fainelli@broadcom.com>,
	Jonas Gorski <jonas.gorski@gmail.com>,
	Woojung Huh <woojung.huh@microchip.com>,
	UNGLinuxDriver@microchip.com, Ziyang Huang <hzyitc@outlook.com>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
	Simon Horman <horms@kernel.org>
Subject: Re: [RFC PATCH net-next v2 4/5] net: dsa: qca8k: flag QCA8337 internal CPU PHYs for SmartSpeed
Date: Wed, 23 Sep 2026 23:57:23 +0200	[thread overview]
Message-ID: <20260923215723.2044-1-yongzhao.derek@gmail.com> (raw)
In-Reply-To: <e78c661c-67c3-46df-acb2-d1fd925c4549@lunn.ch>

Hi Andrew,

SmartSpeed is the Qualcomm PHY driver's downshift feature. Suppressing
it means clearing the enable and bypass-timer bits in register 0x14,
then resetting the PHY. Patch 4 marks QCA8337 internal CPU PHYs for this
treatment; patch 5 performs the register update before reset.

The v2 commit message claimed that waiting for the conduit PHY caused
the loss of Gigabit advertisement. I have not established that cause, so
v3 removes the claim.

Thanks,
Yongzhao Chen

  reply	other threads:[~2026-09-23 21:57 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-09-22 20:26 [RFC PATCH net-next v2 0/5] net: dsa: qca8k: add a QCA8337 CPU PHY consumer Yongzhao Chen
2026-09-22 20:26 ` [RFC PATCH net-next v2 1/5] net: dsa: pass PHY flags when connecting shared ports Yongzhao Chen
2026-09-22 21:49   ` Florian Fainelli
2026-09-22 20:26 ` [RFC PATCH net-next v2 2/5] net: dsa: qca8k: support an internal PHY as the CPU port Yongzhao Chen
2026-09-22 20:26 ` [RFC PATCH net-next v2 3/5] net: dsa: qca8k: serialize CPU MAC pause during MTU changes Yongzhao Chen
2026-09-22 20:58   ` Andrew Lunn
2026-09-23 21:57     ` Yongzhao Chen
2026-09-22 20:26 ` [RFC PATCH net-next v2 4/5] net: dsa: qca8k: flag QCA8337 internal CPU PHYs for SmartSpeed Yongzhao Chen
2026-09-22 21:00   ` Andrew Lunn
2026-09-23 21:57     ` Yongzhao Chen [this message]
2026-09-22 20:26 ` [RFC PATCH net-next v2 5/5] net: phy: qca83xx: disable SmartSpeed before resetting CPU PHYs Yongzhao Chen
2026-09-22 21:06   ` Andrew Lunn
2026-09-23 21:57     ` Yongzhao Chen
2026-09-24 12:30       ` Andrew Lunn
2026-09-24 23:48         ` Yongzhao Chen

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