dt-bindings: net: Document Qcom QCA807x PHY package

Document Qcom QCA807x PHY package.

Qualcomm QCA807X Ethernet PHY is PHY package of 2 or 5
IEEE 802.3 clause 22 compliant 10BASE-Te, 100BASE-TX and
1000BASE-T PHY-s.

Document the required property to make the PHY package correctly
configure and work.
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

Documentation/devicetree/bindings/net/qcom,qca807x.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/qcom,qca807x.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm QCA807x Ethernet PHY
+
+maintainers:
+  - Christian Marangi <ansuelsmth@gmail.com>
+  - Robert Marko <robert.marko@sartura.hr>
+
+description: |
+  Qualcomm QCA8072/5 Ethernet PHY is PHY package of 2 or 5
+  IEEE 802.3 clause 22 compliant 10BASE-Te, 100BASE-TX and
+  1000BASE-T PHY-s.
+
+  They feature 2 SerDes, one for PSGMII or QSGMII connection with
+  MAC, while second one is SGMII for connection to MAC or fiber.
+
+  Both models have a combo port that supports 1000BASE-X and
+  100BASE-FX fiber.
+
+  Each PHY inside of QCA807x series has 4 digitally controlled
+  output only pins that natively drive LED-s for up to 2 attached
+  LEDs. Some vendor also use these 4 output for GPIO usage without
+  attaching LEDs.
+
+  Note that output pins can be set to drive LEDs OR GPIO, mixed
+  definition are not accepted.
+
+$ref: ethernet-phy-package.yaml#
+
+properties:
+  compatible:
+    enum:
+      - qcom,qca8072-package
+      - qcom,qca8075-package
+
+  qcom,package-mode:
+    description: |
+      PHY package can be configured in 3 mode following this table:
+
+                    First Serdes mode       Second Serdes mode
+      Option 1      PSGMII for copper       Disabled
+                    ports 0-4
+      Option 2      PSGMII for copper       1000BASE-X / 100BASE-FX
+                    ports 0-4
+      Option 3      QSGMII for copper       SGMII for
+                    ports 0-3               copper port 4
+
+      PSGMII mode (option 1 or 2) is configured dynamically based on
+      the presence of a connected SFP device.
+    $ref: /schemas/types.yaml#/definitions/string
+    enum:
+      - qsgmii
+      - psgmii
+    default: psgmii
+
+  qcom,tx-drive-strength-milliwatt:
+    description: set the TX Amplifier value in mv.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [140, 160, 180, 200, 220,
+           240, 260, 280, 300, 320,
+           400, 500, 600]
+    default: 600
+
+patternProperties:
+  ^ethernet-phy@[a-f0-9]+$:
+    $ref: ethernet-phy.yaml#
+
+    properties:
+      qcom,dac-full-amplitude:
+        description:
+          Set Analog MDI driver amplitude to FULL.
+
+          With this not defined, amplitude is set to DSP.
+          (amplitude is adjusted based on cable length)
+
+          With this enabled and qcom,dac-full-bias-current
+          and qcom,dac-disable-bias-current-tweak disabled,
+          bias current is half.
+        type: boolean
+
+      qcom,dac-full-bias-current:
+        description:
+          Set Analog MDI driver bias current to FULL.
+
+          With this not defined, bias current is set to DSP.
+          (bias current is adjusted based on cable length)
+
+          Actual bias current might be different with
+          qcom,dac-disable-bias-current-tweak disabled.
+        type: boolean
+
+      qcom,dac-disable-bias-current-tweak:
+        description: |
+          Set Analog MDI driver bias current to disable tweak
+          to bias current.
+
+          With this not defined, bias current tweak are enabled
+          by default.
+
+          With this enabled the following tweak are NOT applied:
+          - With both FULL amplitude and FULL bias current: bias current
+            is set to half.
+          - With only DSP amplitude: bias current is set to half and
+            is set to 1/4 with cable < 10m.
+          - With DSP bias current (included both DSP amplitude and
+            DSP bias current): bias current is half the detected current
+            with cable < 10m.
+        type: boolean
+
+      gpio-controller: true
+
+      '#gpio-cells':
+        const: 2
+
+    if:
+      required:
+        - gpio-controller
+    then:
+      properties:
+        leds: false
+
+    unevaluatedProperties: false
+
+required:
+  - compatible
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/leds/common.h>
+
+    mdio {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        ethernet-phy-package@0 {
+            #address-cells = <1>;
+            #size-cells = <0>;
+            compatible = "qcom,qca8075-package";
+            reg = <0>;
+
+            qcom,package-mode = "qsgmii";
+
+            ethernet-phy@0 {
+                reg = <0>;
+
+                leds {
+                    #address-cells = <1>;
+                    #size-cells = <0>;
+
+                    led@0 {
+                        reg = <0>;
+                        color = <LED_COLOR_ID_GREEN>;
+                        function = LED_FUNCTION_LAN;
+                        default-state = "keep";
+                    };
+                };
+            };
+
+            ethernet-phy@1 {
+                reg = <1>;
+            };
+
+            ethernet-phy@2 {
+                reg = <2>;
+
+                gpio-controller;
+                #gpio-cells = <2>;
+            };
+
+            ethernet-phy@3 {
+                reg = <3>;
+            };
+
+            ethernet-phy@4 {
+                reg = <4>;
+            };
+        };
+    };