[PATCH V2 1/2] dt-bindings: PCI: tegra234: Add ECAM support

[Jon Hunter <jonathanh@nvidia.com>]

From: Vidya Sagar <vidyas@nvidia.com>

Add support for ECAM aperture that is only supported for Tegra234
devices.

Co-developed-by: Vidya Sagar <vidyas@nvidia.com>
Signed-off-by: Vidya Sagar <vidyas@nvidia.com>
Co-developed-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
---
Changes since V1:
- Restricted the ECAM aperture to only Tegra234 devices that support it.

 .../bindings/pci/nvidia,tegra194-pcie.yaml    | 76 +++++++++++++++----
 .../devicetree/bindings/pci/snps,dw-pcie.yaml |  2 +-
 2 files changed, 62 insertions(+), 16 deletions(-)

diff --git a/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie.yaml b/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie.yaml
index 75da3e8eecb9..7ae0f37f5364 100644
--- a/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie.yaml
+++ b/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie.yaml
@@ -27,21 +27,12 @@ properties:
       - nvidia,tegra234-pcie
 
   reg:
-    items:
-      - description: controller's application logic registers
-      - description: configuration registers
-      - description: iATU and DMA registers. This is where the iATU (internal
-          Address Translation Unit) registers of the PCIe core are made
-          available for software access.
-      - description: aperture where the Root Port's own configuration
-          registers are available.
+    minItems: 4
+    maxItems: 5
 
   reg-names:
-    items:
-      - const: appl
-      - const: config
-      - const: atu_dma
-      - const: dbi
+    minItems: 4
+    maxItems: 5
 
   interrupts:
     items:
@@ -202,6 +193,60 @@ properties:
 
 allOf:
   - $ref: /schemas/pci/snps,dw-pcie.yaml#
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - nvidia,tegra194-pcie
+    then:
+      properties:
+        reg:
+          minItems: 4
+          maxItems: 4
+          items:
+            - description: controller's application logic registers
+            - description: configuration registers
+            - description: iATU and DMA registers. This is where the iATU (internal
+                Address Translation Unit) registers of the PCIe core are made
+                available for software access.
+            - description: aperture where the Root Port's own configuration
+                registers are available.
+        reg-names:
+          items:
+            - const: appl
+            - const: config
+            - const: atu_dma
+            - const: dbi
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - nvidia,tegra234-pcie
+    then:
+      properties:
+        reg:
+          minItems: 5
+          maxItems: 5
+          items:
+            - description: controller's application logic registers
+            - description: configuration registers
+            - description: iATU and DMA registers. This is where the iATU (internal
+                Address Translation Unit) registers of the PCIe core are made
+                available for software access.
+            - description: aperture where the Root Port's own configuration
+                registers are available.
+            - description: aperture to access the configuration space through ECAM.
+        reg-names:
+          items:
+            - const: appl
+            - const: config
+            - const: atu_dma
+            - const: dbi
+            - const: ecam
+
 
 unevaluatedProperties: false
 
@@ -305,8 +350,9 @@ examples:
             reg = <0x00 0x14160000 0x0 0x00020000>, /* appl registers (128K)      */
                   <0x00 0x36000000 0x0 0x00040000>, /* configuration space (256K) */
                   <0x00 0x36040000 0x0 0x00040000>, /* iATU_DMA reg space (256K)  */
-                  <0x00 0x36080000 0x0 0x00040000>; /* DBI reg space (256K)       */
-            reg-names = "appl", "config", "atu_dma", "dbi";
+                  <0x00 0x36080000 0x0 0x00040000>, /* DBI reg space (256K)       */
+                  <0x24 0x30000000 0x0 0x10000000>; /* ECAM (256MB)               */
+            reg-names = "appl", "config", "atu_dma", "dbi", "ecam";
 
             #address-cells = <3>;
             #size-cells = <2>;
diff --git a/Documentation/devicetree/bindings/pci/snps,dw-pcie.yaml b/Documentation/devicetree/bindings/pci/snps,dw-pcie.yaml
index 7287d395e1b6..7e0b015f1414 100644
--- a/Documentation/devicetree/bindings/pci/snps,dw-pcie.yaml
+++ b/Documentation/devicetree/bindings/pci/snps,dw-pcie.yaml
@@ -35,7 +35,7 @@ properties:
     maxItems: 5
     items:
       enum: [ dbi, dbi2, config, atu, atu_dma, app, appl, elbi, mgmt, ctrl,
-              parf, cfg, link, ulreg, smu, mpu, apb, phy ]
+              parf, cfg, link, ulreg, smu, mpu, apb, phy, ecam ]
 
   num-lanes:
     description: |
-- 
2.25.1