linux-kernel - [PATCH V1 1/2] dt-bindings: PCI: tegra234: Add ECAM support

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Date:   Thu, 27 Oct 2022 10:42:13 +0530
From:   Vidya Sagar <vidyas@...dia.com>
To:     <robh+dt@...nel.org>, <krzysztof.kozlowski+dt@...aro.org>,
        <thierry.reding@...il.com>, <jonathanh@...dia.com>,
        <mperttunen@...dia.com>
CC:     <devicetree@...r.kernel.org>, <linux-tegra@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <kthota@...dia.com>,
        <mmaddireddy@...dia.com>, <vidyas@...dia.com>, <sagar.tv@...il.com>
Subject: [PATCH V1 1/2] dt-bindings: PCI: tegra234: Add ECAM support

Add support for ECAM aperture for Tegra234.

Signed-off-by: Vidya Sagar <vidyas@...dia.com>
---
 .../devicetree/bindings/pci/nvidia,tegra194-pcie.yaml  | 10 ++++++++--
 .../devicetree/bindings/pci/snps,dw-pcie.yaml          |  2 +-
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie.yaml b/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie.yaml
index 75da3e8eecb9..15cc2d2055bb 100644
--- a/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie.yaml
+++ b/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie.yaml
@@ -27,6 +27,7 @@ properties:
       - nvidia,tegra234-pcie
 
   reg:
+    minItems: 4
     items:
       - description: controller's application logic registers
       - description: configuration registers
@@ -35,13 +36,17 @@ properties:
           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.
+          This is applicable only for Tegra234.
 
   reg-names:
+    minItems: 4
     items:
       - const: appl
       - const: config
       - const: atu_dma
       - const: dbi
+      - const: ecam
 
   interrupts:
     items:
@@ -305,8 +310,9 @@ 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: |
-- 
2.17.1