dt-bindings: net: ti: Adds DUAL-EMAC mode support on PRU-ICSS2 for AM57xx, AM43xx and AM33xx SOCs

Documentation update for the newly added "pruss2_eth" device tree
node and its dependencies along with compatibility for PRU-ICSS
Industrial Ethernet Peripheral (IEP), PRU-ICSS Enhanced Capture
(eCAP) peripheral and using YAML binding document for AM57xx SoCs.

Reviewed-by: Mohan Reddy Putluru <[e-mail]>
Co-developed-by: Basharath Hussain Khaja <[e-mail]>
Signed-off-by: Basharath Hussain Khaja <[e-mail]>
Signed-off-by: Parvathi Pudi <[e-mail]>
Reviewed-by: Rob Herring (Arm) <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

Documentation/devicetree/bindings/net/ti,icss-iep.yaml

···
 
 maintainers:
   - Md Danish Anwar <[e-mail]>
+  - Parvathi Pudi <[e-mail]>
+  - Basharath Hussain Khaja <[e-mail]>
 
 properties:
   compatible:
···
               - ti,am642-icss-iep
               - ti,j721e-icss-iep
           - const: ti,am654-icss-iep
-
-      - const: ti,am654-icss-iep
-
+      - enum:
+          - ti,am654-icss-iep
+          - ti,am5728-icss-iep
+          - ti,am4376-icss-iep
+          - ti,am3356-icss-iep
 
   reg:
     maxItems: 1

Documentation/devicetree/bindings/net/ti,icssm-prueth.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/ti,icssm-prueth.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments ICSSM PRUSS Ethernet
+
+maintainers:
+  - Roger Quadros <[e-mail]>
+  - Andrew F. Davis <[e-mail]>
+  - Parvathi Pudi <[e-mail]>
+  - Basharath Hussain Khaja <[e-mail]>
+
+description:
+  Ethernet based on the Programmable Real-Time Unit and Industrial
+  Communication Subsystem.
+
+properties:
+  compatible:
+    enum:
+      - ti,am57-prueth     # for AM57x SoC family
+      - ti,am4376-prueth   # for AM43x SoC family
+      - ti,am3359-prueth   # for AM33x SoC family
+
+  sram:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      phandle to OCMC SRAM node
+
+  ti,mii-rt:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      phandle to the MII_RT peripheral for ICSS
+
+  ti,iep:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      phandle to IEP (Industrial Ethernet Peripheral) for ICSS
+
+  ti,ecap:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      phandle to Enhanced Capture (eCAP) event for ICSS
+
+  interrupts:
+    items:
+      - description: High priority Rx Interrupt specifier.
+      - description: Low priority Rx Interrupt specifier.
+
+  interrupt-names:
+    items:
+      - const: rx_hp
+      - const: rx_lp
+
+  ethernet-ports:
+    type: object
+    additionalProperties: false
+
+    properties:
+      '#address-cells':
+        const: 1
+      '#size-cells':
+        const: 0
+
+    patternProperties:
+      ^ethernet-port@[0-1]$:
+        type: object
+        description: ICSSM PRUETH external ports
+        $ref: ethernet-controller.yaml#
+        unevaluatedProperties: false
+
+        properties:
+          reg:
+            items:
+              - enum: [0, 1]
+            description: ICSSM PRUETH port number
+
+          interrupts:
+            maxItems: 3
+
+          interrupt-names:
+            items:
+              - const: rx
+              - const: emac_ptp_tx
+              - const: hsr_ptp_tx
+
+        required:
+          - reg
+
+    anyOf:
+      - required:
+          - ethernet-port@0
+      - required:
+          - ethernet-port@1
+
+required:
+  - compatible
+  - sram
+  - ti,mii-rt
+  - ti,iep
+  - ti,ecap
+  - ethernet-ports
+  - interrupts
+  - interrupt-names
+
+allOf:
+  - $ref: /schemas/remoteproc/ti,pru-consumer.yaml#
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    /* Dual-MAC Ethernet application node on PRU-ICSS2 */
+    pruss2_eth: pruss2-eth {
+      compatible = "ti,am57-prueth";
+      ti,prus = <&pru2_0>, <&pru2_1>;
+      sram = <&ocmcram1>;
+      ti,mii-rt = <&pruss2_mii_rt>;
+      ti,iep = <&pruss2_iep>;
+      ti,ecap = <&pruss2_ecap>;
+      interrupts = <20 2 2>, <21 3 3>;
+      interrupt-names = "rx_hp", "rx_lp";
+      interrupt-parent = <&pruss2_intc>;
+
+      ethernet-ports {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        pruss2_emac0: ethernet-port@0 {
+          reg = <0>;
+          phy-handle = <&pruss2_eth0_phy>;
+          phy-mode = "mii";
+          interrupts = <20 2 2>, <26 6 6>, <23 6 6>;
+          interrupt-names = "rx", "emac_ptp_tx", "hsr_ptp_tx";
+          /* Filled in by bootloader */
+          local-mac-address = [00 00 00 00 00 00];
+        };
+
+        pruss2_emac1: ethernet-port@1 {
+          reg = <1>;
+          phy-handle = <&pruss2_eth1_phy>;
+          phy-mode = "mii";
+          interrupts = <21 3 3>, <27 9 7>, <24 9 7>;
+          interrupt-names = "rx", "emac_ptp_tx", "hsr_ptp_tx";
+          /* Filled in by bootloader */
+          local-mac-address = [00 00 00 00 00 00];
+        };
+      };
+    };
+  - |
+    /* Dual-MAC Ethernet application node on PRU-ICSS1 */
+    pruss1_eth: pruss1-eth {
+      compatible = "ti,am4376-prueth";
+      ti,prus = <&pru1_0>, <&pru1_1>;
+      sram = <&ocmcram>;
+      ti,mii-rt = <&pruss1_mii_rt>;
+      ti,iep = <&pruss1_iep>;
+      ti,ecap = <&pruss1_ecap>;
+      interrupts = <20 2 2>, <21 3 3>;
+      interrupt-names = "rx_hp", "rx_lp";
+      interrupt-parent = <&pruss1_intc>;
+
+      pinctrl-0 = <&pruss1_eth_default>;
+      pinctrl-names = "default";
+
+      ethernet-ports {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        pruss1_emac0: ethernet-port@0 {
+          reg = <0>;
+          phy-handle = <&pruss1_eth0_phy>;
+          phy-mode = "mii";
+          interrupts = <20 2 2>, <26 6 6>, <23 6 6>;
+          interrupt-names = "rx", "emac_ptp_tx",
+                                          "hsr_ptp_tx";
+          /* Filled in by bootloader */
+          local-mac-address = [00 00 00 00 00 00];
+        };
+
+        pruss1_emac1: ethernet-port@1 {
+          reg = <1>;
+          phy-handle = <&pruss1_eth1_phy>;
+          phy-mode = "mii";
+          interrupts = <21 3 3>, <27 9 7>, <24 9 7>;
+          interrupt-names = "rx", "emac_ptp_tx",
+                                          "hsr_ptp_tx";
+          /* Filled in by bootloader */
+          local-mac-address = [00 00 00 00 00 00];
+        };
+      };
+    };
+  - |
+    /* Dual-MAC Ethernet application node on PRU-ICSS */
+    pruss_eth: pruss-eth {
+      compatible = "ti,am3359-prueth";
+      ti,prus = <&pru0>, <&pru1>;
+      sram = <&ocmcram>;
+      ti,mii-rt = <&pruss_mii_rt>;
+      ti,iep = <&pruss_iep>;
+      ti,ecap = <&pruss_ecap>;
+      interrupts = <20 2 2>, <21 3 3>;
+      interrupt-names = "rx_hp", "rx_lp";
+      interrupt-parent = <&pruss_intc>;
+
+      pinctrl-0 = <&pruss_eth_default>;
+      pinctrl-names = "default";
+
+      ethernet-ports {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        pruss_emac0: ethernet-port@0 {
+          reg = <0>;
+          phy-handle = <&pruss_eth0_phy>;
+          phy-mode = "mii";
+          interrupts = <20 2 2>, <26 6 6>, <23 6 6>;
+          interrupt-names = "rx", "emac_ptp_tx",
+                                          "hsr_ptp_tx";
+          /* Filled in by bootloader */
+          local-mac-address = [00 00 00 00 00 00];
+        };
+
+        pruss_emac1: ethernet-port@1 {
+          reg = <1>;
+          phy-handle = <&pruss_eth1_phy>;
+          phy-mode = "mii";
+          interrupts = <21 3 3>, <27 9 7>, <24 9 7>;
+          interrupt-names = "rx", "emac_ptp_tx",
+                                          "hsr_ptp_tx";
+          /* Filled in by bootloader */
+          local-mac-address = [00 00 00 00 00 00];
+        };
+      };
+    };

Documentation/devicetree/bindings/net/ti,pruss-ecap.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/ti,pruss-ecap.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments PRU-ICSS Enhanced Capture (eCAP) event module
+
+maintainers:
+  - Murali Karicheri <[e-mail]>
+  - Parvathi Pudi <[e-mail]>
+  - Basharath Hussain Khaja <[e-mail]>
+
+properties:
+  compatible:
+    const: ti,pruss-ecap
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    pruss2_ecap: ecap@30000 {
+        compatible = "ti,pruss-ecap";
+        reg = <0x30000 0x60>;
+    };

Documentation/devicetree/bindings/soc/ti/ti,pruss.yaml

···
 
     type: object
 
+  ecap@[a-f0-9]+$:
+    description:
+      PRU-ICSS has a Enhanced Capture (eCAP) event module which can generate
+      and capture periodic timer based events which will be used for features
+      like RX Pacing to rise interrupt when the timer event has occurred.
+      Each PRU-ICSS instance has one eCAP module irrespective of SOCs.
+    $ref: /schemas/net/ti,pruss-ecap.yaml#
+    type: object
+
   mii-rt@[a-f0-9]+$:
     description: |
       Real-Time Ethernet to support multiple industrial communication protocols.