linux-kernel - [PATCH] dt-bindings: mailbox: Convert brcm,iproc-pdc-mbox to DT schema

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Message-ID: <20250812181406.65390-1-robh@kernel.org>
Date: Tue, 12 Aug 2025 13:14:04 -0500
From: "Rob Herring (Arm)" <robh@...nel.org>
To: Jassi Brar <jassisinghbrar@...il.com>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Ray Jui <rjui@...adcom.com>,
	Scott Branden <sbranden@...adcom.com>,
	Broadcom internal kernel review list <bcm-kernel-feedback-list@...adcom.com>
Cc: linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: [PATCH] dt-bindings: mailbox: Convert brcm,iproc-pdc-mbox to DT schema

Convert the Broadcom iProc PDC mailbox binding to DT schema format. It's
a straightforward conversion.

Signed-off-by: Rob Herring (Arm) <robh@...nel.org>
---
 .../bindings/mailbox/brcm,iproc-pdc-mbox.txt  | 25 -------
 .../bindings/mailbox/brcm,iproc-pdc-mbox.yaml | 66 +++++++++++++++++++
 2 files changed, 66 insertions(+), 25 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/mailbox/brcm,iproc-pdc-mbox.txt
 create mode 100644 Documentation/devicetree/bindings/mailbox/brcm,iproc-pdc-mbox.yaml

diff --git a/Documentation/devicetree/bindings/mailbox/brcm,iproc-pdc-mbox.txt b/Documentation/devicetree/bindings/mailbox/brcm,iproc-pdc-mbox.txt
deleted file mode 100644
index 9bcdf2087625..000000000000
--- a/Documentation/devicetree/bindings/mailbox/brcm,iproc-pdc-mbox.txt
+++ /dev/null
@@ -1,25 +0,0 @@
-The PDC driver manages data transfer to and from various offload engines
-on some Broadcom SoCs. An SoC may have multiple PDC hardware blocks. There is
-one device tree entry per block.  On some chips, the PDC functionality is
-handled by the FA2 (Northstar Plus).
-
-Required properties:
-- compatible : Should be "brcm,iproc-pdc-mbox" or "brcm,iproc-fa2-mbox" for
-  FA2/Northstar Plus.
-- reg: Should contain PDC registers location and length.
-- interrupts: Should contain the IRQ line for the PDC.
-- #mbox-cells: 1
-- brcm,rx-status-len: Length of metadata preceding received frames, in bytes.
-
-Optional properties:
-- brcm,use-bcm-hdr:  present if a BCM header precedes each frame.
-
-Example:
-	pdc0: iproc-pdc0@...c0000 {
-		compatible = "brcm,iproc-pdc-mbox";
-		reg = <0 0x612c0000 0 0x445>;  /* PDC FS0 regs */
-		interrupts = <GIC_SPI 187 IRQ_TYPE_LEVEL_HIGH>;
-		#mbox-cells = <1>;   /* one cell per mailbox channel */
-		brcm,rx-status-len = <32>;
-		brcm,use-bcm-hdr;
-	};
diff --git a/Documentation/devicetree/bindings/mailbox/brcm,iproc-pdc-mbox.yaml b/Documentation/devicetree/bindings/mailbox/brcm,iproc-pdc-mbox.yaml
new file mode 100644
index 000000000000..5534ae07c9fa
--- /dev/null
+++ b/Documentation/devicetree/bindings/mailbox/brcm,iproc-pdc-mbox.yaml
@@ -0,0 +1,66 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mailbox/brcm,iproc-pdc-mbox.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Broadcom iProc PDC mailbox
+
+maintainers:
+  - Ray Jui <rjui@...adcom.com>
+  - Scott Branden <sbranden@...adcom.com>
+
+description:
+  The PDC driver manages data transfer to and from various offload engines on
+  some Broadcom SoCs. An SoC may have multiple PDC hardware blocks. There is one
+  device tree entry per block. On some chips, the PDC functionality is handled
+  by the FA2 (Northstar Plus).
+
+properties:
+  compatible:
+    enum:
+      - brcm,iproc-pdc-mbox
+      - brcm,iproc-fa2-mbox
+
+  reg:
+    maxItems: 1
+
+  dma-coherent: true
+
+  interrupts:
+    maxItems: 1
+
+  '#mbox-cells':
+    const: 1
+
+  brcm,rx-status-len:
+    description:
+      Length of metadata preceding received frames, in bytes.
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  brcm,use-bcm-hdr:
+    type: boolean
+    description:
+      Present if a BCM header precedes each frame.
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - '#mbox-cells'
+  - brcm,rx-status-len
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    mailbox0@...c0000 {
+        compatible = "brcm,iproc-pdc-mbox";
+        reg = <0x612c0000 0x445>;
+        interrupts = <GIC_SPI 187 IRQ_TYPE_LEVEL_HIGH>;
+        #mbox-cells = <1>;
+        brcm,rx-status-len = <32>;
+        brcm,use-bcm-hdr;
+    };
-- 
2.47.2