diff options
| author | Osose Itua <osose.itua@savoirfairelinux.com> | 2026-01-07 17:16:52 -0500 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2026-01-15 19:36:04 -0800 |
| commit | 7376ba2db168c9e83f90e68f5f85c7d7f5645164 (patch) | |
| tree | 8df376d030aac6d8b7ea228df771e84f7dc9eee8 | |
| parent | 96a2d53f24787df907e8bab388cc3e8f180a2314 (diff) | |
dt-bindings: net: adi,adin: document LP Termination property
Add "adi,low-cmode-impedance" boolean property which, when present,
configures the PHY for the lowest common-mode impedance on the receive
pair for 100BASE-TX operation by clearing the B_100_ZPTM_EN_DIMRX bit.
This is suited for capacitive coupled applications and other
applications where there may be a path for high common-mode noise to
reach the PHY.
If this value is not present, the value of the bit by default is 1,
which is normal termination (zero-power termination) mode.
Signed-off-by: Osose Itua <osose.itua@savoirfairelinux.com>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://patch.msgid.link/20260107221913.1334157-2-osose.itua@savoirfairelinux.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | Documentation/devicetree/bindings/net/adi,adin.yaml | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/net/adi,adin.yaml b/Documentation/devicetree/bindings/net/adi,adin.yaml index c425a9f1886d..f594055c2b15 100644 --- a/Documentation/devicetree/bindings/net/adi,adin.yaml +++ b/Documentation/devicetree/bindings/net/adi,adin.yaml @@ -52,6 +52,20 @@ properties: description: Enable 25MHz reference clock output on CLK25_REF pin. type: boolean + adi,low-cmode-impedance: + description: | + Configure PHY for the lowest common-mode impedance on the receive pair + for 100BASE-TX. This is suited for capacitive coupled applications and + other applications where there may be a path for high common-mode noise + to reach the PHY. + If not present, by default the PHY is configured for normal termination + (zero-power termination) mode. + + Note: There is a trade-off of 12 mW increased power consumption with + the lowest common-mode impedance setting, but in all cases the + differential impedance is 100 ohms. + type: boolean + unevaluatedProperties: false examples: |