linux-kernel - [PATCH] dt-bindings: soc: bcm: add missing dt-binding document for bcm23550-cdc

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Message-ID: <20230508135930.GA27583@standask-GA-A55M-S2HP>
Date:   Mon, 8 May 2023 15:59:30 +0200
From:   Stanislav Jakubek <stano.jakubek@...il.com>
To:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Florian Fainelli <f.fainelli@...il.com>
Cc:     bcm-kernel-feedback-list@...adcom.com, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] dt-bindings: soc: bcm: add missing dt-binding document for
 bcm23550-cdc

Broadcom BCM23550 has a Cluster Dormant Control block that keeps the CPU
in idle state. A command needs to be sent to this block to bring the CPU
into running state.

This has been in use in mainline Linux since ~2016, but was never
documented. Add a dt-binding document for it.

Signed-off-by: Stanislav Jakubek <stano.jakubek@...il.com>
---
 .../bindings/soc/bcm/brcm,bcm23550-cdc.yaml   | 35 +++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/soc/bcm/brcm,bcm23550-cdc.yaml

diff --git a/Documentation/devicetree/bindings/soc/bcm/brcm,bcm23550-cdc.yaml b/Documentation/devicetree/bindings/soc/bcm/brcm,bcm23550-cdc.yaml
new file mode 100644
index 000000000000..1a952f569803
--- /dev/null
+++ b/Documentation/devicetree/bindings/soc/bcm/brcm,bcm23550-cdc.yaml
@@ -0,0 +1,35 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/soc/bcm/brcm,bcm23550-cdc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Broadcom BCM23550 Cluster Dormant Control
+
+description:
+  The Cluster Dormant Control block keeps the CPU in idle state. A command
+  needs to be sent to this block to bring the CPU into running state.
+
+maintainers:
+  - Florian Fainelli <f.fainelli@...il.com>
+
+properties:
+  compatible:
+    const: brcm,bcm23550-cdc
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    cdc@...0e000 {
+        compatible = "brcm,bcm23550-cdc";
+        reg = <0x3fe0e000 0x78>;
+    };
+...
-- 
2.25.1