linux-kernel - [PATCH v3 1/2] dt-bindings: net: dp83826: support TX data voltage tuning

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Message-Id: <20240209123628.2113971-1-catalin.popescu@leica-geosystems.com>
Date: Fri,  9 Feb 2024 13:36:27 +0100
From: Catalin Popescu <catalin.popescu@...ca-geosystems.com>
To: davem@...emloft.net,
	kuba@...nel.org,
	pabeni@...hat.com,
	robh+dt@...nel.org,
	krzysztof.kozlowski+dt@...aro.org,
	conor+dt@...nel.org,
	afd@...com,
	andrew@...n.ch,
	hkallweit1@...il.com,
	linux@...linux.org.uk
Cc: netdev@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	bsp-development.geo@...ca-geosystems.com,
	m.felsch@...gutronix.de,
	Catalin Popescu <catalin.popescu@...ca-geosystems.com>
Subject: [PATCH v3 1/2] dt-bindings: net: dp83826: support TX data voltage tuning

Add properties ti,cfg-dac-minus-one-bp/ti,cfg-dac-plus-one-bp
to support voltage tuning of logical levels -1/+1 of the MLT-3
encoded TX data.

Signed-off-by: Catalin Popescu <catalin.popescu@...ca-geosystems.com>
---
Changes in v2:
 - squash the 2 DT bindings patches in one single patch
 - drop redundant "binding" from the DT bindings patch title
 - rename DT properties and define them as percentage
 - add default value for each new DT property

Changes in v3:
 - rename properties to "-bp" and change their admissible values
   accordingly
---
 .../devicetree/bindings/net/ti,dp83822.yaml    | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/ti,dp83822.yaml b/Documentation/devicetree/bindings/net/ti,dp83822.yaml
index db74474207ed..8f4350be689c 100644
--- a/Documentation/devicetree/bindings/net/ti,dp83822.yaml
+++ b/Documentation/devicetree/bindings/net/ti,dp83822.yaml
@@ -62,6 +62,24 @@ properties:
        for the PHY.  The internal delay for the PHY is fixed to 3.5ns relative
        to transmit data.
 
+  ti,cfg-dac-minus-one-bp:
+    description: |
+       DP83826 PHY only.
+       Sets the voltage ratio (with respect to the nominal value)
+       of the logical level -1 for the MLT-3 encoded TX data.
+    enum: [5000, 5625, 6250, 6875, 7500, 8125, 8750, 9375, 10000,
+           10625, 11250, 11875, 12500, 13125, 13750, 14375, 15000]
+    default: 10000
+
+  ti,cfg-dac-plus-one-bp:
+    description: |
+       DP83826 PHY only.
+       Sets the voltage ratio (with respect to the nominal value)
+       of the logical level +1 for the MLT-3 encoded TX data.
+    enum: [5000, 5625, 6250, 6875, 7500, 8125, 8750, 9375, 10000,
+           10625, 11250, 11875, 12500, 13125, 13750, 14375, 15000]
+    default: 10000
+
 required:
   - reg
 

base-commit: 1f719a2f3fa67665578c759ac34fd3d3690c1a20
prerequisite-patch-id: 0000000000000000000000000000000000000000
-- 
2.34.1