[net-next PATCH v11 4/9] dt-bindings: mfd: Document support for Airoha AN8855 Switch SoC

[Christian Marangi <ansuelsmth@gmail.com>]

Document support for Airoha AN8855 Switch SoC. This SoC expose various
peripherals like an Ethernet Switch, a NVMEM provider and Ethernet PHYs.

It does also support i2c and timers but those are not currently
supported/used.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
---
 .../bindings/mfd/airoha,an8855-mfd.yaml       | 178 ++++++++++++++++++
 MAINTAINERS                                   |   1 +
 2 files changed, 179 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/airoha,an8855-mfd.yaml

diff --git a/Documentation/devicetree/bindings/mfd/airoha,an8855-mfd.yaml b/Documentation/devicetree/bindings/mfd/airoha,an8855-mfd.yaml
new file mode 100644
index 000000000000..9ad03499fabb
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/airoha,an8855-mfd.yaml
@@ -0,0 +1,178 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/airoha,an8855-mfd.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Airoha AN8855 Switch SoC
+
+maintainers:
+  - Christian Marangi <ansuelsmth@gmail.com>
+
+description: >
+  Airoha AN8855 Switch is a SoC that expose various peripherals like an
+  Ethernet Switch, a NVMEM provider and Ethernet PHYs.
+
+  It does also support i2c and timers but those are not currently
+  supported/used.
+
+properties:
+  compatible:
+    const: airoha,an8855-mfd
+
+  reg:
+    maxItems: 1
+
+  efuse:
+    type: object
+    $ref: /schemas/nvmem/airoha,an8855-efuse.yaml
+    description:
+      EFUSE exposed by the Airoha AN8855 Switch. This child node definition
+      should follow the bindings specified in
+      Documentation/devicetree/bindings/nvmem/airoha,an8855-efuse.yaml
+
+  ethernet-switch:
+    type: object
+    $ref: /schemas/net/dsa/airoha,an8855-switch.yaml
+    description:
+      Switch exposed by the Airoha AN8855 Switch. This child node definition
+      should follow the bindings specified in
+      Documentation/devicetree/bindings/net/dsa/airoha,an8855-switch.yaml
+
+  mdio:
+    type: object
+    $ref: /schemas/net/airoha,an8855-mdio.yaml
+    description:
+      MDIO exposed by the Airoha AN8855 Switch. This child node definition
+      should follow the bindings specified in
+      Documentation/devicetree/bindings/net/airoha,an8855-mdio.yaml
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    mdio {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        mfd@1 {
+            compatible = "airoha,an8855-mfd";
+            reg = <1>;
+
+            efuse {
+                compatible = "airoha,an8855-efuse";
+
+                #nvmem-cell-cells = <0>;
+
+                nvmem-layout {
+                    compatible = "fixed-layout";
+                    #address-cells = <1>;
+                    #size-cells = <1>;
+
+                    shift_sel_port0_tx_a: shift-sel-port0-tx-a@c {
+                       reg = <0xc 0x4>;
+                    };
+
+                    shift_sel_port0_tx_b: shift-sel-port0-tx-b@10 {
+                        reg = <0x10 0x4>;
+                    };
+
+                    shift_sel_port0_tx_c: shift-sel-port0-tx-c@14 {
+                        reg = <0x14 0x4>;
+                    };
+
+                    shift_sel_port0_tx_d: shift-sel-port0-tx-d@18 {
+                       reg = <0x18 0x4>;
+                    };
+
+                    shift_sel_port1_tx_a: shift-sel-port1-tx-a@1c {
+                        reg = <0x1c 0x4>;
+                    };
+
+                    shift_sel_port1_tx_b: shift-sel-port1-tx-b@20 {
+                        reg = <0x20 0x4>;
+                    };
+
+                    shift_sel_port1_tx_c: shift-sel-port1-tx-c@24 {
+                       reg = <0x24 0x4>;
+                    };
+
+                    shift_sel_port1_tx_d: shift-sel-port1-tx-d@28 {
+                        reg = <0x28 0x4>;
+                    };
+                };
+            };
+
+            ethernet-switch {
+                compatible = "airoha,an8855-switch";
+
+                reset-gpios = <&pio 39 0>;
+
+                airoha,ext-surge;
+
+                ports {
+                    #address-cells = <1>;
+                    #size-cells = <0>;
+
+                    port@0 {
+                        reg = <0>;
+                        label = "lan1";
+                        phy-mode = "internal";
+                        phy-handle = <&internal_phy1>;
+                    };
+
+                    port@1 {
+                        reg = <1>;
+                        label = "lan2";
+                        phy-mode = "internal";
+                        phy-handle = <&internal_phy2>;
+                    };
+
+                    port@5 {
+                        reg = <5>;
+                        label = "cpu";
+                        ethernet = <&gmac0>;
+                        phy-mode = "2500base-x";
+
+                        fixed-link {
+                            speed = <2500>;
+                            full-duplex;
+                            pause;
+                        };
+                    };
+                };
+            };
+
+            mdio {
+                compatible = "airoha,an8855-mdio";
+                #address-cells = <1>;
+                #size-cells = <0>;
+
+                internal_phy1: phy@1 {
+                  reg = <1>;
+
+                  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";
+                };
+
+                internal_phy2: phy@2 {
+                  reg = <2>;
+
+                  nvmem-cells = <&shift_sel_port1_tx_a>,
+                      <&shift_sel_port1_tx_b>,
+                      <&shift_sel_port1_tx_c>,
+                      <&shift_sel_port1_tx_d>;
+                  nvmem-cell-names = "tx_a", "tx_b", "tx_c", "tx_d";
+                };
+            };
+        };
+    };
diff --git a/MAINTAINERS b/MAINTAINERS
index fd37e829fab5..f3e3f6938824 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -717,6 +717,7 @@ L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 L:	linux-mediatek@lists.infradead.org (moderated for non-subscribers)
 L:	netdev@vger.kernel.org
 S:	Maintained
+F:	Documentation/devicetree/bindings/mfd/airoha,an8855-mfd.yaml
 F:	Documentation/devicetree/bindings/net/airoha,an8855-mdio.yaml
 F:	Documentation/devicetree/bindings/net/dsa/airoha,an8855-switch.yaml
 F:	Documentation/devicetree/bindings/nvmem/airoha,an8855-efuse.yaml
-- 
2.45.2