linux-kernel - [PATCH V3 1/2] dt-bindings: mtd: partitions: u-boot: allow dynamic subpartitions

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Date:   Tue, 18 Oct 2022 17:42:01 +0200
From:   Rafał Miłecki <zajec5@...il.com>
To:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        Tom Rini <trini@...sulko.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Joel Peshkin <joel.peshkin@...adcom.com>,
        William Zhang <william.zhang@...adcom.com>,
        Conor Dooley <conor.dooley@...rochip.com>,
        devicetree@...r.kernel.org, linux-mtd@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, u-boot@...ts.denx.de,
        bcm-kernel-feedback-list@...adcom.com,
        linux-kernel@...r.kernel.org,
        Rafał Miłecki <rafal@...ecki.pl>
Subject: [PATCH V3 1/2] dt-bindings: mtd: partitions: u-boot: allow dynamic subpartitions

From: Rafał Miłecki <rafal@...ecki.pl>

U-Boot partition may contain subpartitions. For example Broadcom
includes environment data block in the middle of its U-Boot partition.

This allows describing Broadcom's U-Boot env data and will allow
referencing its NVMEM cell in the future.

Reg: 118f3fbe517f4 ("dt-bindings: mtd: partitions: support label/name only partition")
Ref: dd638202dfb65 ("dt-bindings: mtd: partitions: add additional example for qcom,smem-part")
Signed-off-by: Rafał Miłecki <rafal@...ecki.pl>
---
V3: Add this patch as pre-requirement for u-boot,env.yaml & brcm,env
---
 .../devicetree/bindings/mtd/partitions/u-boot.yaml         | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/mtd/partitions/u-boot.yaml b/Documentation/devicetree/bindings/mtd/partitions/u-boot.yaml
index 8a88e7d16524..3c56efe48efd 100644
--- a/Documentation/devicetree/bindings/mtd/partitions/u-boot.yaml
+++ b/Documentation/devicetree/bindings/mtd/partitions/u-boot.yaml
@@ -27,6 +27,10 @@ properties:
           Broadcom stores environment variables inside a U-Boot partition. They
           can be identified by a custom header with magic value.
 
+patternProperties:
+  "^partition-.*$":
+    $ref: partition.yaml#
+
 unevaluatedProperties: false
 
 examples:
@@ -40,6 +44,9 @@ examples:
             compatible = "brcm,u-boot";
             reg = <0x0 0x100000>;
             label = "u-boot";
+
+            partition-u-boot-env {
+            };
         };
 
         partition@...000 {
-- 
2.34.1