linux-kernel - [PATCH net-next v2 0/2] dsa: mxl-gsw1xx: Support R(G)MII slew rate configuration

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Message-ID: <20251216121705.65156-1-alexander.sverdlin@siemens.com>
Date: Tue, 16 Dec 2025 13:16:59 +0100
From: "A. Sverdlin" <alexander.sverdlin@...mens.com>
To: netdev@...r.kernel.org
Cc: Alexander Sverdlin <alexander.sverdlin@...mens.com>,
	Hauke Mehrtens <hauke@...ke-m.de>,
	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>,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Daniel Golle <daniel@...rotopia.org>
Subject: [PATCH net-next v2 0/2] dsa: mxl-gsw1xx: Support R(G)MII slew rate configuration

From: Alexander Sverdlin <alexander.sverdlin@...mens.com>

Maxlinear GSW1xx switches offer slew rate configuration bits for R(G)MII
interface. The default state of the configuration bits is "normal", while
"slow" can be used to reduce the radiated emissions. Add the support for
the latter option into the driver as well as the new DT bindings.

Changelog:
v2:
- do not hijack gsw1xx_phylink_mac_select_pcs() for configuring the port,
  introduce struct gswip_hw_info::port_setup callback
- actively configure "normal" slew rate (if the new DT property is missing)
- properly use regmap_set_bits() (v1 had reg and value mixed up)
v1:
- https://lore.kernel.org/all/20251212204557.2082890-1-alexander.sverdlin@siemens.com/

Alexander Sverdlin (2):
  dt-bindings: net: dsa: lantiq,gswip: add MaxLinear R(G)MII slew rate
  net: dsa: mxl-gsw1xx: Support R(G)MII slew rate configuration

 .../bindings/net/dsa/lantiq,gswip.yaml        |  5 ++++
 drivers/net/dsa/lantiq/lantiq_gswip.h         |  1 +
 drivers/net/dsa/lantiq/lantiq_gswip_common.c  |  6 +++++
 drivers/net/dsa/lantiq/mxl-gsw1xx.c           | 26 +++++++++++++++++++
 drivers/net/dsa/lantiq/mxl-gsw1xx.h           |  2 ++
 5 files changed, 40 insertions(+)

-- 
2.52.0