linux-kernel - [net-next PATCH v12 04/13] dt-bindings: net: Document support for AN8855 Switch Internal PHY

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Message-ID: <20250309172717.9067-5-ansuelsmth@gmail.com>
Date: Sun,  9 Mar 2025 18:26:49 +0100
From: Christian Marangi <ansuelsmth@...il.com>
To: Lee Jones <lee@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Christian Marangi <ansuelsmth@...il.com>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Vladimir Oltean <olteanv@...il.com>,
	Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
	Heiner Kallweit <hkallweit1@...il.com>,
	Russell King <linux@...linux.org.uk>,
	Maxime Chevallier <maxime.chevallier@...tlin.com>,
	Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org,
	netdev@...r.kernel.org,
	upstream@...oha.com
Subject: [net-next PATCH v12 04/13] dt-bindings: net: Document support for AN8855 Switch Internal PHY

Document support for AN8855 Switch Internal PHY.

Airoha AN8855 is a 5-port Gigabit Switch that expose the Internal
PHYs on the MDIO bus.

Each PHY might need to be calibrated to correctly work with the
use of the eFUSE provided by the Switch SoC. This can be enabled by
defining in the PHY node the "airoha,ext-surge" property.

Signed-off-by: Christian Marangi <ansuelsmth@...il.com>
---
 .../bindings/net/airoha,an8855-phy.yaml       | 93 +++++++++++++++++++
 MAINTAINERS                                   |  1 +
 2 files changed, 94 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/net/airoha,an8855-phy.yaml

diff --git a/Documentation/devicetree/bindings/net/airoha,an8855-phy.yaml b/Documentation/devicetree/bindings/net/airoha,an8855-phy.yaml
new file mode 100644
index 000000000000..301c46f84904
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/airoha,an8855-phy.yaml
@@ -0,0 +1,93 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/airoha,an8855-phy.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Airoha AN8855 Switch Internal PHY
+
+maintainers:
+  - Christian Marangi <ansuelsmth@...il.com>
+
+description: >
+  Airoha AN8855 is a 5-port Gigabit Switch that expose the Internal
+  PHYs on the MDIO bus.
+
+  Each PHY might need to be calibrated to correctly work with the
+  use of the eFUSE provided by the Switch SoC.
+
+allOf:
+  - $ref: ethernet-phy.yaml#
+
+select:
+  properties:
+    compatible:
+      contains:
+        enum:
+          - ethernet-phy-idc0ff.0410
+  required:
+    - compatible
+
+properties:
+  reg:
+    maxItems: 1
+
+  airoha,ext-surge:
+    description: enable PHY calibration with the use of SoC eFUSE.
+
+  nvmem-cells:
+    items:
+      - description: phandle to SoC eFUSE tx_a
+      - description: phandle to SoC eFUSE tx_b
+      - description: phandle to SoC eFUSE tx_c
+      - description: phandle to SoC eFUSE tx_d
+
+  nvmem-cell-names:
+    items:
+      - const: tx_a
+      - const: tx_b
+      - const: tx_c
+      - const: tx_d
+
+required:
+  - compatible
+  - reg
+
+if:
+  required:
+    - airoha,ext-surge
+then:
+  required:
+    - nvmem-cells
+    - nvmem-cell-names
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    mdio {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        ethernet-phy@1 {
+            compatible = "ethernet-phy-idc0ff.0410",
+                         "ethernet-phy-ieee802.3-c45";
+
+            reg = <1>;
+        };
+
+        ethernet-phy@2 {
+            compatible = "ethernet-phy-idc0ff.0410",
+                         "ethernet-phy-ieee802.3-c45";
+
+            reg = <2>;
+
+            airoha,ext-surge;
+
+            nvmem-cells = <&shift_sel_port0_tx_a>,
+                <&shift_sel_port0_tx_b>,
+                <&shift_sel_port0_tx_c>,
+                <&shift_sel_port0_tx_d>;
+            nvmem-cell-names = "tx_a", "tx_b", "tx_c", "tx_d";
+        };
+    };
diff --git a/MAINTAINERS b/MAINTAINERS
index 696ad8465ea8..45f4bb8deb0d 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -726,6 +726,7 @@ L:	linux-mediatek@...ts.infradead.org (moderated for non-subscribers)
 L:	netdev@...r.kernel.org
 S:	Maintained
 F:	Documentation/devicetree/bindings/net/airoha,an8855-mdio.yaml
+F:	Documentation/devicetree/bindings/net/airoha,an8855-phy.yaml
 F:	Documentation/devicetree/bindings/net/dsa/airoha,an8855-switch.yaml
 F:	Documentation/devicetree/bindings/nvmem/airoha,an8855-efuse.yaml
 
-- 
2.48.1