linux-kernel - [PATCH v2 2/2] dt-bindings: mtd: partitions: Document special values

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Date:   Fri, 27 Oct 2023 17:46:10 +0800
From:   Edward Chow <equu@...nmail.cc>
To:     Rob Herring <robh+dt@...nel.org>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc:     linux-mtd@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Lech Perczak <lech.perczak@...lingroup.com>,
        Edward Chow <equu@...nmail.cc>
Subject: [PATCH v2 2/2] dt-bindings: mtd: partitions: Document special values

Add examples for special values in linux/mtd/partitions.h.

Signed-off-by: Edward Chow <equu@...nmail.cc>
---
 .../mtd/partitions/fixed-partitions.yaml      | 30 +++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/Documentation/devicetree/bindings/mtd/partitions/fixed-partitions.yaml b/Documentation/devicetree/bindings/mtd/partitions/fixed-partitions.yaml
index 331e564f29dc..e7bf466c395f 100644
--- a/Documentation/devicetree/bindings/mtd/partitions/fixed-partitions.yaml
+++ b/Documentation/devicetree/bindings/mtd/partitions/fixed-partitions.yaml
@@ -164,3 +164,33 @@ examples:
             read-only;
         };
     };
+
+  - |
+    #include <dt-bindings/mtd/partitions.h>
+    partitions {
+        compatible = "fixed-partitions";
+        #address-cells = <2>;
+        #size-cells = <1>;
+
+        partition@0 {
+            label = "bootloader";
+            reg = <0 0x000000 0x020000>;
+            read-only;
+        };
+
+        firmware@1 {
+            label = "firmware";
+            /* From the end of the last partition, occupying as mush
+             * as possible, retaining 0x010000 after it,
+             * "MTDPART_OFS_SPECIAL MTDPART_OFS_NXTBLK" similar to
+             * this, but always beginning at erase block boundary. */
+            reg = <MTDPART_OFS_SPECIAL MTDPART_OFS_RETAIN 0x010000>;
+        };
+
+        calibration@2 {
+            compatible = "fixed-partitions";
+            label = "calibration";
+            /* Appending to the last partition, occupying 0x010000 */
+            reg = <MTDPART_OFS_SPECIAL MTDPART_OFS_APPEND 0x010000>;
+        };
+    };
-- 
2.42.0