linux-kernel - [net-next RFC PATCH 03/14] dt-bindings: net: document ethernet PHY package nodes

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Date:   Mon, 20 Nov 2023 14:50:30 +0100
From:   Christian Marangi <ansuelsmth@...il.com>
To:     "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        Florian Fainelli <florian.fainelli@...adcom.com>,
        Broadcom internal kernel review list 
        <bcm-kernel-feedback-list@...adcom.com>,
        Daniel Golle <daniel@...rotopia.org>,
        Qingfang Deng <dqfext@...il.com>,
        SkyLake Huang <SkyLake.Huang@...iatek.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        David Epping <david.epping@...singlinkelectronics.com>,
        Vladimir Oltean <olteanv@...il.com>,
        Christian Marangi <ansuelsmth@...il.com>,
        "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>,
        Harini Katakam <harini.katakam@....com>,
        Simon Horman <horms@...nel.org>,
        Robert Marko <robert.marko@...tura.hr>, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: [net-next RFC PATCH 03/14] dt-bindings: net: document ethernet PHY package nodes

Document ethernet PHY package nodes used to describe PHY shipped in
bundle of 4-5 PHY. These particular PHY require specific PHY in the
package for global onfiguration of the PHY package.

Example are PHY package that have some regs only in one PHY of the
package and will affect every other PHY in the package, for example
related to PHY interface mode calibration or global PHY mode selection.

The PHY package node should use the global-phys property and the
global-phy-names to define PHY in the package required by the PHY driver
for global configuration.

It's also possible to specify the property phy-mode to specify that the
PHY package sets a global PHY interface mode and every PHY of the
package requires to have the same PHY interface mode.

Signed-off-by: Christian Marangi <ansuelsmth@...il.com>
---
 .../bindings/net/ethernet-phy-package.yaml    | 86 +++++++++++++++++++
 1 file changed, 86 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/net/ethernet-phy-package.yaml

diff --git a/Documentation/devicetree/bindings/net/ethernet-phy-package.yaml b/Documentation/devicetree/bindings/net/ethernet-phy-package.yaml
new file mode 100644
index 000000000000..2aa109e155d9
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/ethernet-phy-package.yaml
@@ -0,0 +1,86 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/ethernet-phy-package.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Ethernet PHY Package Common Properties
+
+maintainers:
+  - Christian Marangi <ansuelsmth@...il.com
+
+properties:
+  $nodename:
+    pattern: "^ethernet-phy-package(-[0-9]+)?$"
+
+  compatible:
+    const: ethernet-phy-package
+
+  '#address-cells':
+    description: number of address cells for the MDIO bus
+    const: 1
+
+  '#size-cells':
+    description: number of size cells on the MDIO bus
+    const: 0
+
+  global-phys:
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+    minItems: 1
+    maxItems: 31
+    description:
+      List of phandle to the PHY in the package required and
+      used to configure the PHY package.
+
+  global-phy-names:
+    $ref: /schemas/types.yaml#/definitions/string-array
+    minItems: 1
+    maxItems: 31
+    description:
+      List of names of the PHY defined in global-phys.
+
+  phy-connection-type:
+    $ref: /schemas/net/ethernet-phy-mode-types.yaml#definitions/phy-connection-type
+    description:
+      Specifies global interface type for the PHY package.
+
+  phy-mode:
+    $ref: "#/properties/phy-connection-type"
+
+patternProperties:
+  ^ethernet-phy(@[a-f0-9]+)?$:
+    $ref: /schemas/net/ethernet-phy.yaml#
+
+required:
+  - compatible
+
+dependencies:
+  global-phy-names: [global-phys]
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    ethernet {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        ethernet-phy-package {
+            compatible = "ethernet-phy-package";
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            global-phys = <&phy4>;
+            global-phy-names = "base";
+
+            ethernet-phy@1 {
+              compatible = "ethernet-phy-ieee802.3-c22";
+              reg = <1>;
+            };
+
+            phy4: ethernet-phy@4 {
+              compatible = "ethernet-phy-ieee802.3-c22";
+              reg = <4>;
+            };
+        };
+    };
-- 
2.40.1