linux-kernel - [PATCH net-next v2 0/3] net: phy: dp83822: Add support for changing the MAC series termination

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Message-Id: <20250408-dp83822-mac-impedance-v2-0-fefeba4a9804@liebherr.com>
Date: Tue, 08 Apr 2025 09:45:31 +0200
From: Dimitri Fedrau via B4 Relay <devnull+dimitri.fedrau.liebherr.com@...nel.org>
To: Andrew Lunn <andrew@...n.ch>, Heiner Kallweit <hkallweit1@...il.com>, 
 Russell King <linux@...linux.org.uk>, 
 "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>, Florian Fainelli <f.fainelli@...il.com>
Cc: netdev@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Dimitri Fedrau <dimitri.fedrau@...bherr.com>, 
 Dimitri Fedrau <dima.fedrau@...il.com>
Subject: [PATCH net-next v2 0/3] net: phy: dp83822: Add support for
 changing the MAC series termination

The dp83822 provides the possibility to set the resistance value of the
the MAC series termination. Modifying the resistance to an appropriate
value can reduce signal reflections and therefore improve signal quality.

Signed-off-by: Dimitri Fedrau <dimitri.fedrau@...bherr.com>
---
Changes in v2:
- Renamed "mac-series-termination-ohms" to "mac-termination-ohms"
- Added description for "mac-termination-ohms"
- Renamed "phy_get_mac_series_termination" to "phy_get_mac_termination"
- Dropped "mac_series_termination_modify" from dp83822_private
- Init mac_termination_index in dp8382x_probe
- Renamed "mac_series_termination" to "mac_termination"
- Link to v1: https://lore.kernel.org/r/20250307-dp83822-mac-impedance-v1-0-bdd85a759b45@liebherr.com

---
Dimitri Fedrau (3):
      dt-bindings: net: ethernet-phy: add property mac-termination-ohms
      net: phy: Add helper for getting MAC termination resistance
      net: phy: dp83822: Add support for changing the MAC termination

 .../devicetree/bindings/net/ethernet-phy.yaml      |  9 ++++++
 drivers/net/phy/dp83822.c                          | 33 ++++++++++++++++++++++
 drivers/net/phy/phy_device.c                       | 15 ++++++++++
 include/linux/phy.h                                |  3 ++
 4 files changed, 60 insertions(+)
---
base-commit: 61f96e684edd28ca40555ec49ea1555df31ba619
change-id: 20250305-dp83822-mac-impedance-840435b0c9e6

Best regards,
-- 
Dimitri Fedrau <dimitri.fedrau@...bherr.com>