linux-kernel - [Patch v3 6/6] dt-bindings: thermal: Add dt binding for QCOM LMh

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Date:   Thu,  8 Jul 2021 08:06:56 -0400
From:   Thara Gopinath <thara.gopinath@...aro.org>
To:     agross@...nel.org, bjorn.andersson@...aro.org, rui.zhang@...el.com,
        daniel.lezcano@...aro.org, viresh.kumar@...aro.org,
        rjw@...ysocki.net, robh+dt@...nel.org
Cc:     tdas@...eaurora.org, mka@...omium.org,
        linux-arm-msm@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: [Patch v3 6/6] dt-bindings: thermal: Add dt binding for QCOM LMh

Add dt binding documentation to describe Qualcomm
Limits Management Hardware node.

Signed-off-by: Thara Gopinath <thara.gopinath@...aro.org>
---
 .../devicetree/bindings/thermal/qcom-lmh.yaml | 100 ++++++++++++++++++
 1 file changed, 100 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/thermal/qcom-lmh.yaml

diff --git a/Documentation/devicetree/bindings/thermal/qcom-lmh.yaml b/Documentation/devicetree/bindings/thermal/qcom-lmh.yaml
new file mode 100644
index 000000000000..7f62bd3d543d
--- /dev/null
+++ b/Documentation/devicetree/bindings/thermal/qcom-lmh.yaml
@@ -0,0 +1,100 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright 2021 Linaro Ltd.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/thermal/qcom-lmh.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm Limits Management Hardware(LMh)
+
+maintainers:
+  - Thara Gopinath <thara.gopinath@...aro.org>
+
+description:
+  Limits Management Hardware(LMh) is a hardware infrastructure on some
+  Qualcomm SoCs that can enforce temperature and current limits as
+  programmed by software for certain IPs like CPU.
+
+properties:
+  compatible:
+    enum:
+      - qcom,sdm845-lmh
+
+  reg:
+    items:
+      - description: core registers
+
+  interrupts:
+    maxItems: 1
+
+  '#interrupt-cells':
+    const: 1
+
+  interrupt-controller: true
+
+  qcom,lmh-cpu-id:
+    description:
+      CPU id of the first cpu in the LMh cluster
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  qcom,lmh-temperature-arm:
+    description:
+      An integer expressing temperature threshold in millicelsius at which
+      the LMh thermal FSM is engaged.
+    $ref: /schemas/types.yaml#/definitions/int32
+
+  qcom,lmh-temperature-low:
+    description:
+      An integer expressing temperature threshold in millicelsius at which
+      the LMh thermal FSM is engaged.
+    $ref: /schemas/types.yaml#/definitions/int32
+
+  qcom,lmh-temperature-high:
+    description:
+      An integer expressing temperature threshold in millicelsius at which
+      the LMh thermal FSM is engaged.
+    $ref: /schemas/types.yaml#/definitions/int32
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - #interrupt-cells
+  - interrupt-controller
+  - qcom,lmh-cpu-id
+  - qcom,lmh-temperature-arm
+  - qcom,lmh-temperature-low
+  - qcom,lmh-temperature-high
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/clock/qcom,rpmh.h>
+    #include <dt-bindings/interconnect/qcom,sdm845.h>
+
+    lmh_cluster1: lmh@...70800 {
+      compatible = "qcom,sdm845-lmh";
+      reg = <0 0x17d70800 0 0x401>;
+      interrupts = <GIC_SPI 33 IRQ_TYPE_LEVEL_HIGH>;
+      qcom,lmh-cpu-id = <0x4>;
+      qcom,lmh-temperature-arm = <65000>;
+      qcom,lmh-temperature-low = <94500>;
+      qcom,lmh-temperature-high = <95000>;
+      interrupt-controller;
+      #interrupt-cells = <1>;
+    };
+  - |
+    lmh_cluster0: lmh@...78800 {
+      compatible = "qcom,sdm845-lmh";
+      reg = <0 0x17d78800 0 0x401>;
+      interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>;
+      qcom,lmh-cpu-id = <0x0>;
+      qcom,lmh-temperature-arm = <65000>;
+      qcom,lmh-temperature-low = <94500>;
+      qcom,lmh-temperature-high = <95000>;
+      interrupt-controller;
+      #interrupt-cells = <1>;
+    };
+  - |
-- 
2.25.1