linux-kernel - [RFC PATCH net-next 0/6] net: dsa: b53: mmap: Add bcm63xx EPHY power and reset control

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Message-ID: <20250620134132.5195-1-kylehendrydev@gmail.com>
Date: Fri, 20 Jun 2025 06:41:15 -0700
From: Kyle Hendry <kylehendrydev@...il.com>
To: Florian Fainelli <florian.fainelli@...adcom.com>,
	Andrew Lunn <andrew@...n.ch>,
	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>,
	Russell King <linux@...linux.org.uk>
Cc: noltari@...il.com,
	jonas.gorski@...il.com,
	Kyle Hendry <kylehendrydev@...il.com>,
	Florian Fainelli <f.fainelli@...il.com>,
	netdev@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [RFC PATCH net-next 0/6] net: dsa: b53: mmap: Add bcm63xx EPHY power and reset control

Some bcm63268 bootloaders hold the fast ethernet phys in reset 
causing an error when they're probed. The resets are controlled 
by a register in the gpio controller, and would need a minimal 
driver to set. However, that register also controls the 
power states of the EPHYs. I'm trying to implement both 
functionalities at the same time to make sure that they don't 
interfere with eachother. These patches allow control of the 
ephy register from the b53 switch driver. 

Is this the right place for this code, or should it be in a 
power domain? Should the resets be handled by a separate reset
controller?

Signed-off-by: Kyle Hendry <kylehendrydev@...il.com>

Kyle Hendry (6):
  net: dsa: b53: Add phy_enable(), phy_disable() methods
  net: dsa: b53: mmap: Add reference to bcm63xx gpio controller
  dt-bindings: net: dsa: b53: Document brcm,gpio-ctrl property
  net: dsa: b53: mmap: Add register layout for bcm63268
  net: dsa: b53: mmap: Clear resets on bcm63xx EPHYs
  net: dsa: b53: mmap: Implement bcm63xx ephy power control

 .../devicetree/bindings/net/dsa/brcm,b53.yaml |  5 +
 drivers/net/dsa/b53/b53_common.c              |  6 ++
 drivers/net/dsa/b53/b53_mmap.c                | 99 ++++++++++++++++++-
 drivers/net/dsa/b53/b53_priv.h                |  2 +
 4 files changed, 111 insertions(+), 1 deletion(-)

-- 
2.43.0