linux-kernel - [PATCH v4 2/3] dt-bindings: mtd: partitions: Extend fixed-partitions binding

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Message-Id: <20220510162403.20861-1-csharper2005@gmail.com>
Date:   Tue, 10 May 2022 16:24:03 +0000
From:   Mikhail Zhilkin <csharper2005@...il.com>
To:     Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        Rob Herring <robh+dt@...nel.org>
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rafał Miłecki <rafal@...ecki.pl>,
        linux-mtd@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Karim <Karimdplay@...il.com>,
        M <x1@...root.org>, Mikhail Zhilkin <csharper2005@...il.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: [PATCH v4 2/3] dt-bindings: mtd: partitions: Extend fixed-partitions binding

Extend fixed-partitions binding for support of Sercomm partition parser
(add "sercomm,sc-partitions" compatible).

Signed-off-by: Mikhail Zhilkin <csharper2005@...il.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
---
 .../mtd/partitions/fixed-partitions.yaml      | 55 ++++++++++++++++++-
 1 file changed, 53 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/mtd/partitions/fixed-partitions.yaml b/Documentation/devicetree/bindings/mtd/partitions/fixed-partitions.yaml
index ea4cace6a955..ad3ccd250802 100644
--- a/Documentation/devicetree/bindings/mtd/partitions/fixed-partitions.yaml
+++ b/Documentation/devicetree/bindings/mtd/partitions/fixed-partitions.yaml
@@ -19,7 +19,11 @@ maintainers:
 
 properties:
   compatible:
-    const: fixed-partitions
+    oneOf:
+      - const: fixed-partitions
+      - items:
+          - const: sercomm,sc-partitions
+          - const: fixed-partitions
 
   "#address-cells": true
 
@@ -27,7 +31,24 @@ properties:
 
 patternProperties:
   "@[0-9a-f]+$":
-    $ref: "partition.yaml#"
+    allOf:
+      - $ref: "partition.yaml#"
+      - if:
+          properties:
+            compatible:
+              contains:
+                const: sercomm,sc-partitions
+        then:
+          properties:
+            sercomm,scpart-id:
+              description: Partition id in Sercomm partition map. Mtd
+                parser uses this id to find a record in the partition map
+                containing offset and size of the current partition. The
+                values from partition map overrides partition offset and
+                size defined in reg property of the dts. Frequently these
+                values are the same, but may differ if device has bad
+                eraseblocks on a flash.
+              $ref: /schemas/types.yaml#/definitions/uint32
 
 required:
   - "#address-cells"
@@ -52,6 +73,7 @@ examples:
             reg = <0x0100000 0x200000>;
         };
     };
+
   - |
     partitions {
         compatible = "fixed-partitions";
@@ -64,6 +86,7 @@ examples:
             reg = <0x00000000 0x1 0x00000000>;
         };
     };
+
   - |
     partitions {
         compatible = "fixed-partitions";
@@ -82,6 +105,7 @@ examples:
             reg = <0x2 0x00000000 0x1 0x00000000>;
         };
     };
+
   - |
     partitions {
         compatible = "fixed-partitions";
@@ -119,3 +143,30 @@ examples:
             };
         };
     };
+
+  - |
+    partitions {
+        compatible = "sercomm,sc-partitions", "fixed-partitions";
+        #address-cells = <1>;
+        #size-cells = <1>;
+
+        partition@0 {
+            label = "u-boot";
+            reg = <0x0 0x100000>;
+            sercomm,scpart-id = <0>;
+            read-only;
+        };
+
+        partition@...000 {
+            label = "dynamic partition map";
+            reg = <0x100000 0x100000>;
+            sercomm,scpart-id = <1>;
+        };
+
+        partition@...000 {
+            label = "Factory";
+            reg = <0x200000 0x100000>;
+            sercomm,scpart-id = <2>;
+            read-only;
+        };
+    };
-- 
2.25.1