dt-bindings: PCI: qcom,pcie-ipq6018: Move IPQ6018 and IPQ8074 Gen3 to dedicated schema

Move IPQ6018 and IPQ8074 Gen3 (which is the same as in IPQ6018) PCIe
devices from qcom,pcie.yaml binding to a dedicated file to make
reviewing and maintenance easier.

New schema is equivalent to the old one with few changes:
 - Adding a required compatible, which is actually redundant.
 - Drop the really obvious comments next to clock/reg/reset-names items.
 - Disallow legacy/incomplete description with only one interrupt and
   expect exactly nine of them.
 - Do not require power domains on IPQ6018, because old binding already
   does not require them for IPQ8074 Gen3, devices are the same and
   in-tree DTS lacks power domains.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/20251217-dt-bindings-pci-qcom-v2-6-873721599754@oss.qualcomm.com

2 files changed, 179 insertions, 40 deletions

diff --git a/Documentation/devicetree/bindings/pci/qcom,pcie-ipq6018.yaml b/Documentation/devicetree/bindings/pci/qcom,pcie-ipq6018.yaml
new file mode 100644
index 000000000000..6843570eb051
--- /dev/null
+++ b/Documentation/devicetree/bindings/pci/qcom,pcie-ipq6018.yaml
@@ -0,0 +1,179 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pci/qcom,pcie-ipq6018.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm IPQ6018 PCI Express Root Complex
+
+maintainers:
+  - Bjorn Andersson <andersson@kernel.org>
+  - Manivannan Sadhasivam <mani@kernel.org>
+
+properties:
+  compatible:
+    enum:
+      - qcom,pcie-ipq6018
+      - qcom,pcie-ipq8074-gen3
+
+  reg:
+    minItems: 5
+    maxItems: 6
+
+  reg-names:
+    minItems: 5
+    items:
+      - const: dbi
+      - const: elbi
+      - const: atu
+      - const: parf
+      - const: config
+      - const: mhi
+
+  clocks:
+    maxItems: 5
+
+  clock-names:
+    items:
+      - const: iface # PCIe to SysNOC BIU clock
+      - const: axi_m # AXI Master clock
+      - const: axi_s # AXI Slave clock
+      - const: axi_bridge
+      - const: rchng
+
+  interrupts:
+    maxItems: 9
+
+  interrupt-names:
+    items:
+      - const: msi0
+      - const: msi1
+      - const: msi2
+      - const: msi3
+      - const: msi4
+      - const: msi5
+      - const: msi6
+      - const: msi7
+      - const: global
+
+  resets:
+    maxItems: 8
+
+  reset-names:
+    items:
+      - const: pipe
+      - const: sleep
+      - const: sticky # Core sticky reset
+      - const: axi_m # AXI master reset
+      - const: axi_s # AXI slave reset
+      - const: ahb
+      - const: axi_m_sticky # AXI master sticky reset
+      - const: axi_s_sticky # AXI slave sticky reset
+
+required:
+  - resets
+  - reset-names
+
+allOf:
+  - $ref: qcom,pcie-common.yaml#
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/qcom,gcc-ipq6018.h>
+    #include <dt-bindings/gpio/gpio.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/reset/qcom,gcc-ipq6018.h>
+
+    soc {
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        pcie@20000000 {
+            compatible = "qcom,pcie-ipq6018";
+            reg = <0x0 0x20000000 0x0 0xf1d>,
+                  <0x0 0x20000f20 0x0 0xa8>,
+                  <0x0 0x20001000 0x0 0x1000>,
+                  <0x0 0x80000 0x0 0x4000>,
+                  <0x0 0x20100000 0x0 0x1000>;
+            reg-names = "dbi", "elbi", "atu", "parf", "config";
+            ranges = <0x81000000 0x0 0x00000000 0x0 0x20200000 0x0 0x10000>,
+                     <0x82000000 0x0 0x20220000 0x0 0x20220000 0x0 0xfde0000>;
+
+            device_type = "pci";
+            linux,pci-domain = <0>;
+            bus-range = <0x00 0xff>;
+            num-lanes = <1>;
+            max-link-speed = <3>;
+            #address-cells = <3>;
+            #size-cells = <2>;
+
+            clocks = <&gcc GCC_SYS_NOC_PCIE0_AXI_CLK>,
+                     <&gcc GCC_PCIE0_AXI_M_CLK>,
+                     <&gcc GCC_PCIE0_AXI_S_CLK>,
+                     <&gcc GCC_PCIE0_AXI_S_BRIDGE_CLK>,
+                     <&gcc PCIE0_RCHNG_CLK>;
+            clock-names = "iface",
+                          "axi_m",
+                          "axi_s",
+                          "axi_bridge",
+                          "rchng";
+
+            interrupts = <GIC_SPI 52 IRQ_TYPE_LEVEL_HIGH>,
+                         <GIC_SPI 55 IRQ_TYPE_LEVEL_HIGH>,
+                         <GIC_SPI 56 IRQ_TYPE_LEVEL_HIGH>,
+                         <GIC_SPI 57 IRQ_TYPE_LEVEL_HIGH>,
+                         <GIC_SPI 59 IRQ_TYPE_LEVEL_HIGH>,
+                         <GIC_SPI 63 IRQ_TYPE_LEVEL_HIGH>,
+                         <GIC_SPI 68 IRQ_TYPE_LEVEL_HIGH>,
+                         <GIC_SPI 72 IRQ_TYPE_LEVEL_HIGH>,
+                         <GIC_SPI 51 IRQ_TYPE_LEVEL_HIGH>;
+            interrupt-names = "msi0",
+                              "msi1",
+                              "msi2",
+                              "msi3",
+                              "msi4",
+                              "msi5",
+                              "msi6",
+                              "msi7",
+                              "global";
+
+            #interrupt-cells = <1>;
+            interrupt-map-mask = <0 0 0 0x7>;
+            interrupt-map = <0 0 0 1 &intc 0 0 GIC_SPI 75 IRQ_TYPE_LEVEL_HIGH>, /* int_a */
+                            <0 0 0 2 &intc 0 0 GIC_SPI 78 IRQ_TYPE_LEVEL_HIGH>, /* int_b */
+                            <0 0 0 3 &intc 0 0 GIC_SPI 79 IRQ_TYPE_LEVEL_HIGH>, /* int_c */
+                            <0 0 0 4 &intc 0 0 GIC_SPI 83 IRQ_TYPE_LEVEL_HIGH>; /* int_d */
+
+            phys = <&pcie_phy>;
+            phy-names = "pciephy";
+
+            resets = <&gcc GCC_PCIE0_PIPE_ARES>,
+                     <&gcc GCC_PCIE0_SLEEP_ARES>,
+                     <&gcc GCC_PCIE0_CORE_STICKY_ARES>,
+                     <&gcc GCC_PCIE0_AXI_MASTER_ARES>,
+                     <&gcc GCC_PCIE0_AXI_SLAVE_ARES>,
+                     <&gcc GCC_PCIE0_AHB_ARES>,
+                     <&gcc GCC_PCIE0_AXI_MASTER_STICKY_ARES>,
+                     <&gcc GCC_PCIE0_AXI_SLAVE_STICKY_ARES>;
+            reset-names = "pipe",
+                          "sleep",
+                          "sticky",
+                          "axi_m",
+                          "axi_s",
+                          "ahb",
+                          "axi_m_sticky",
+                          "axi_s_sticky";
+
+            pcie@0 {
+                device_type = "pci";
+                reg = <0x0 0x0 0x0 0x0 0x0>;
+                bus-range = <0x01 0xff>;
+
+                #address-cells = <3>;
+                #size-cells = <2>;
+                ranges;
+            };
+        };
+    };
diff --git a/Documentation/devicetree/bindings/pci/qcom,pcie.yaml b/Documentation/devicetree/bindings/pci/qcom,pcie.yaml
index b448b8f07f55..780a77f35b34 100644
--- a/Documentation/devicetree/bindings/pci/qcom,pcie.yaml
+++ b/Documentation/devicetree/bindings/pci/qcom,pcie.yaml
@@ -21,11 +21,9 @@ properties:
           - qcom,pcie-apq8064
           - qcom,pcie-apq8084
           - qcom,pcie-ipq4019
-          - qcom,pcie-ipq6018
           - qcom,pcie-ipq8064
           - qcom,pcie-ipq8064-v2
           - qcom,pcie-ipq8074
-          - qcom,pcie-ipq8074-gen3
           - qcom,pcie-ipq9574
           - qcom,pcie-msm8996
       - items:
@@ -164,8 +162,6 @@ allOf:
         compatible:
           contains:
             enum:
-              - qcom,pcie-ipq6018
-              - qcom,pcie-ipq8074-gen3
               - qcom,pcie-ipq9574
     then:
       properties:
@@ -355,39 +351,6 @@ allOf:
         compatible:
           contains:
             enum:
-              - qcom,pcie-ipq6018
-              - qcom,pcie-ipq8074-gen3
-    then:
-      properties:
-        clocks:
-          minItems: 5
-          maxItems: 5
-        clock-names:
-          items:
-            - const: iface # PCIe to SysNOC BIU clock
-            - const: axi_m # AXI Master clock
-            - const: axi_s # AXI Slave clock
-            - const: axi_bridge # AXI bridge clock
-            - const: rchng
-        resets:
-          minItems: 8
-          maxItems: 8
-        reset-names:
-          items:
-            - const: pipe # PIPE reset
-            - const: sleep # Sleep reset
-            - const: sticky # Core Sticky reset
-            - const: axi_m # AXI Master reset
-            - const: axi_s # AXI Slave reset
-            - const: ahb # AHB Reset
-            - const: axi_m_sticky # AXI Master Sticky reset
-            - const: axi_s_sticky # AXI Slave Sticky reset
-
-  - if:
-      properties:
-        compatible:
-          contains:
-            enum:
               - qcom,pcie-ipq9574
     then:
       properties:
@@ -443,7 +406,6 @@ allOf:
                 - qcom,pcie-ipq8064
                 - qcom,pcie-ipq8064v2
                 - qcom,pcie-ipq8074
-                - qcom,pcie-ipq8074-gen3
                 - qcom,pcie-ipq9574
     then:
       required:
@@ -466,9 +428,7 @@ allOf:
         compatible:
           contains:
             enum:
-              - qcom,pcie-ipq6018
               - qcom,pcie-ipq8074
-              - qcom,pcie-ipq8074-gen3
               - qcom,pcie-msm8996
               - qcom,pcie-msm8998
     then: