linux-kernel - [RFC 1/7] dt-bindings: mailbox: qcom: Add CPUCP mailbox controller bindings

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Message-ID: <20240117173458.2312669-2-quic_sibis@quicinc.com>
Date: Wed, 17 Jan 2024 23:04:52 +0530
From: Sibi Sankar <quic_sibis@...cinc.com>
To: <sudeep.holla@....com>, <cristian.marussi@....com>, <andersson@...nel.org>,
        <konrad.dybcio@...aro.org>, <jassisinghbrar@...il.com>,
        <robh+dt@...nel.org>, <krzysztof.kozlowski+dt@...aro.org>
CC: <linux-kernel@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <quic_rgottimu@...cinc.com>,
        <quic_kshivnan@...cinc.com>, <quic_sibis@...cinc.com>,
        <conor+dt@...nel.org>
Subject: [RFC 1/7] dt-bindings: mailbox: qcom: Add CPUCP mailbox controller bindings

Add devicetree binding for CPUSS Control Processor (CPUCP) mailbox
controller.

Signed-off-by: Sibi Sankar <quic_sibis@...cinc.com>
---
 .../bindings/mailbox/qcom,cpucp-mbox.yaml     | 51 +++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mailbox/qcom,cpucp-mbox.yaml

diff --git a/Documentation/devicetree/bindings/mailbox/qcom,cpucp-mbox.yaml b/Documentation/devicetree/bindings/mailbox/qcom,cpucp-mbox.yaml
new file mode 100644
index 000000000000..2617e5555acb
--- /dev/null
+++ b/Documentation/devicetree/bindings/mailbox/qcom,cpucp-mbox.yaml
@@ -0,0 +1,51 @@
+# SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mailbox/qcom,cpucp-mbox.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm Technologies, Inc. CPUCP Mailbox Controller
+
+maintainers:
+  - Sibi Sankar <quic_sibis@....qualcomm.com>
+
+description:
+  The CPUSS Control Processor (CPUCP) mailbox controller enables communication
+  between AP and CPUCP by acting as a doorbell between them.
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - qcom,x1e80100-cpucp-mbox
+      - const: qcom,cpucp-mbox
+
+  reg:
+    items:
+      - description: CPUCP rx register region
+      - description: CPUCP tx register region
+
+  interrupts:
+    maxItems: 1
+
+  "#mbox-cells":
+    const: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - "#mbox-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    mailbox@...30000 {
+        compatible = "qcom,x1e80100-cpucp-mbox", "qcom,cpucp-mbox";
+        reg = <0x17430000 0x10000>, <0x18830000 0x300>;
+        interrupts = <GIC_SPI 62 IRQ_TYPE_LEVEL_HIGH>;
+        #mbox-cells = <1>;
+    };
-- 
2.34.1