From: Andrew Lunn <andrew@lunn.ch>
To: "Jens Emil Schulz Østergaard" <jensemil.schulzostergaard@microchip.com>
Cc: UNGLinuxDriver@microchip.com, Vladimir Oltean <olteanv@gmail.com>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Simon Horman <horms@kernel.org>, Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Woojung Huh <woojung.huh@microchip.com>,
Russell King <linux@armlinux.org.uk>,
Steen Hegelund <Steen.Hegelund@microchip.com>,
Daniel Machon <daniel.machon@microchip.com>,
linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
devicetree@vger.kernel.org
Subject: Re: [PATCH net-next v7 4/9] net: dsa: lan9645x: add basic dsa driver for LAN9645X
Date: Wed, 3 Jun 2026 14:37:14 +0200 [thread overview]
Message-ID: <d4fa4e93-9373-47a9-aaa9-e3d687c58d82@lunn.ch> (raw)
In-Reply-To: <20260603-dsa_lan9645x_switch_driver_base-v7-4-b2f90e676707@microchip.com>
On Wed, Jun 03, 2026 at 09:25:23AM +0200, Jens Emil Schulz Østergaard wrote:
> Add the LAN9645X basic DSA driver with initialization, parent regmap
> requests, port module initialization for NPI, CPU ports and front ports,
> and phylink integration for MAC side configuration.
A terminology question. How does a NPI port differ from the CPU port?
The datasheet defines NPI as "Node Processor Interface", which sounds
a lot like the CPU port.
4.18 CPU Port Module
The CPU port module (DEVCPU) contains eight CPU extraction queues
and two CPU injection queues. These queues provide an interface for
exchanging frames between an external CPU system and the switch. In
addition, any Ethernet interface on the device can be used for
extracting and injecting frames. The Ethernet interface used in this
way is called a node processor interface (NPI).
Andrew
next prev parent reply other threads:[~2026-06-03 12:37 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-03 7:25 [PATCH net-next v7 0/9] net: dsa: add DSA support for the LAN9645x switch chip family Jens Emil Schulz Østergaard
2026-06-03 7:25 ` [PATCH net-next v7 1/9] net: dsa: add tag driver for LAN9645X Jens Emil Schulz Østergaard
2026-06-03 7:25 ` [PATCH net-next v7 2/9] dt-bindings: net: lan9645x: add LAN9645X switch bindings Jens Emil Schulz Østergaard
2026-06-03 7:25 ` [PATCH net-next v7 3/9] net: dsa: lan9645x: add autogenerated register macros Jens Emil Schulz Østergaard
2026-06-03 7:25 ` [PATCH net-next v7 4/9] net: dsa: lan9645x: add basic dsa driver for LAN9645X Jens Emil Schulz Østergaard
2026-06-03 12:37 ` Andrew Lunn [this message]
2026-06-08 8:20 ` Jens Emil Schulz Ostergaard
2026-06-08 18:00 ` Andrew Lunn
2026-06-09 7:08 ` Jens Emil Schulz Ostergaard
2026-06-09 8:48 ` Andrew Lunn
2026-06-03 7:25 ` [PATCH net-next v7 5/9] net: dsa: lan9645x: add bridge support Jens Emil Schulz Østergaard
2026-06-03 7:25 ` [PATCH net-next v7 6/9] net: dsa: lan9645x: add vlan support Jens Emil Schulz Østergaard
2026-06-03 7:25 ` [PATCH net-next v7 7/9] net: dsa: lan9645x: add mac table integration Jens Emil Schulz Østergaard
2026-06-03 7:25 ` [PATCH net-next v7 8/9] net: dsa: lan9645x: add mdb management Jens Emil Schulz Østergaard
2026-06-03 7:25 ` [PATCH net-next v7 9/9] net: dsa: lan9645x: add port statistics Jens Emil Schulz Østergaard
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