[PATCH 3/3] dt-bindings: net: add schema for NXP S32 dwmac glue driver

[Wadim Mueller <wafgo01@gmail.com>]

Add DT binding schema documentation for the NXP S32 dwmac glue driver. This documentation is based on the patchset originally provided by Chester Lin [1]. This commit is a re-send of [2] and [3].

[1] https://patchwork.kernel.org/project/netdevbpf/patch/20221031101052.14956-6-clin@suse.com/#25068228
[2] https://lore.kernel.org/lkml/20221031101052.14956-1-clin@suse.com/T/#me96c28bd0536de276dee941469ea084d51b42244
[3] https://lore.kernel.org/lkml/20221031101052.14956-1-clin@suse.com/T/#m887a1b34e612f8dc0d5b718e4d6834c083f1e245

Signed-off-by: Wadim Mueller <wafgo01@gmail.com>
---
 .../bindings/net/nxp,s32-dwmac.yaml           | 130 ++++++++++++++++++
 .../devicetree/bindings/net/snps,dwmac.yaml   |   5 +-
 2 files changed, 133 insertions(+), 2 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/net/nxp,s32-dwmac.yaml

diff --git a/Documentation/devicetree/bindings/net/nxp,s32-dwmac.yaml b/Documentation/devicetree/bindings/net/nxp,s32-dwmac.yaml
new file mode 100644
index 000000000000..0fbca6ce7d60
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/nxp,s32-dwmac.yaml
@@ -0,0 +1,130 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/net/nxp,s32-dwmac.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: NXP S32 DWMAC Ethernet controller
+
+select:
+  properties:
+    compatible:
+      contains:
+        enum:
+          - nxp,s32-dwmac
+  required:
+    - compatible
+
+allOf:
+  - $ref: "snps,dwmac.yaml#"
+
+properties:
+  compatible:
+    contains:
+      enum:
+        - nxp,s32-dwmac
+
+  reg:
+    items:
+      - description: Main GMAC registers
+      - description: S32 MAC control registers
+
+  dma-coherent:
+    description:
+      Declares GMAC device as DMA coherent
+
+  clocks:
+    items:
+      - description: Main GMAC clock
+      - description: Peripheral registers clock
+      - description: Transmit SGMII clock
+      - description: Transmit RGMII clock
+      - description: Transmit RMII clock
+      - description: Transmit MII clock
+      - description: Receive SGMII clock
+      - description: Receive RGMII clock
+      - description: Receive RMII clock
+      - description: Receive MII clock
+      - description:
+          PTP reference clock. This clock is used for programming the
+          Timestamp Addend Register. If not passed then the system
+          clock will be used.
+
+  clock-names:
+    items:
+      - const: stmmaceth
+      - const: pclk
+      - const: tx_sgmii
+      - const: tx_rgmii
+      - const: tx_rmii
+      - const: tx_mii
+      - const: rx_sgmii
+      - const: rx_rgmii
+      - const: rx_rmii
+      - const: rx_mii
+      - const: ptp_ref
+
+  tx-fifo-depth:
+    const: 20480
+
+  rx-fifo-depth:
+    const: 20480
+
+required:
+  - compatible
+  - reg
+  - tx-fifo-depth
+  - rx-fifo-depth
+  - clocks
+  - clock-names
+
+additionalProperties: true
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/clock/nxp,s32-scmi-clock.h>
+
+    soc {
+      #address-cells = <1>;
+      #size-cells = <1>;
+
+      gmac0: ethernet@4033c000 {
+        compatible = "nxp,s32-dwmac";
+        reg = <0x4033c000 0x2000>, /* gmac IP */
+              <0x4007C004 0x4>;    /* S32 CTRL_STS reg */
+        interrupt-parent = <&gic>;
+        interrupts = <GIC_SPI 57 IRQ_TYPE_LEVEL_HIGH>;
+        interrupt-names = "macirq";
+        phy-mode = "rgmii-id";
+        tx-fifo-depth = <20480>;
+        rx-fifo-depth = <20480>;
+        dma-coherent;
+        clocks = <&clks S32_SCMI_CLK_GMAC0_AXI>,
+                 <&clks S32_SCMI_CLK_GMAC0_AXI>,
+                 <&clks S32_SCMI_CLK_GMAC0_TX_SGMII>,
+                 <&clks S32_SCMI_CLK_GMAC0_TX_RGMII>,
+                 <&clks S32_SCMI_CLK_GMAC0_TX_RMII>,
+                 <&clks S32_SCMI_CLK_GMAC0_TX_MII>,
+                 <&clks S32_SCMI_CLK_GMAC0_RX_SGMII>,
+                 <&clks S32_SCMI_CLK_GMAC0_RX_RGMII>,
+                 <&clks S32_SCMI_CLK_GMAC0_RX_RMII>,
+                 <&clks S32_SCMI_CLK_GMAC0_RX_MII>,
+                 <&clks S32_SCMI_CLK_GMAC0_TS>;
+        clock-names = "stmmaceth", "pclk",
+                      "tx_sgmii", "tx_rgmii", "tx_rmii", "tx_mii",
+                      "rx_sgmii", "rx_rgmii", "rx_rmii", "rx_mii",
+                      "ptp_ref";
+
+        gmac0_mdio: mdio {
+          #address-cells = <1>;
+          #size-cells = <0>;
+          compatible = "snps,dwmac-mdio";
+
+          ethernet-phy@1 {
+            reg = <0x01>;
+          };
+        };
+      };
+    };
diff --git a/Documentation/devicetree/bindings/net/snps,dwmac.yaml b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
index 5c2769dc689a..e5bf61347b66 100644
--- a/Documentation/devicetree/bindings/net/snps,dwmac.yaml
+++ b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
@@ -66,6 +66,7 @@ properties:
         - ingenic,x2000-mac
         - loongson,ls2k-dwmac
         - loongson,ls7a-dwmac
+        - nxp,s32-dwmac
         - qcom,qcs404-ethqos
         - qcom,sa8775p-ethqos
         - qcom,sc8280xp-ethqos
@@ -117,7 +118,7 @@ properties:
 
   clocks:
     minItems: 1
-    maxItems: 8
+    maxItems: 11
     additionalItems: true
     items:
       - description: GMAC main clock
@@ -129,7 +130,7 @@ properties:
 
   clock-names:
     minItems: 1
-    maxItems: 8
+    maxItems: 11
     additionalItems: true
     contains:
       enum:
-- 
2.25.1


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