[v9,2/2] dt-bindings: cpufreq: add bindings for MediaTek cpufreq HW

Commit Message

Hector Yuan Dec. 10, 2020, 7:48 a.m. UTC

From: "Hector.Yuan" <[e-mail]>

Add devicetree bindings for MediaTek HW driver.

Signed-off-by: Hector.Yuan <[e-mail]>
---
 .../bindings/cpufreq/cpufreq-mediatek-hw.yaml      |  112 ++++++++++++++++++++
 1 file changed, 112 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/cpufreq/cpufreq-mediatek-hw.yaml

Comments

Rob Herring (Arm) Dec. 11, 2020, 2:52 a.m. UTC | #1

On Thu, 10 Dec 2020 15:48:36 +0800, Hector Yuan wrote:
> From: "Hector.Yuan" <[e-mail]>
> 
> Add devicetree bindings for MediaTek HW driver.
> 
> Signed-off-by: Hector.Yuan <[e-mail]>
> ---
>  .../bindings/cpufreq/cpufreq-mediatek-hw.yaml      |  112 ++++++++++++++++++++
>  1 file changed, 112 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/cpufreq/cpufreq-mediatek-hw.yaml
> 


My bot found errors running 'make dt_binding_check' on your patch:

yamllint warnings/errors:

dtschema/dtc warnings/errors:
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/cpufreq/cpufreq-mediatek-hw.yaml: 'additionalProperties' is a required property
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/cpufreq/cpufreq-mediatek-hw.yaml: ignoring, error in schema: 
warning: no schema found in file: ./Documentation/devicetree/bindings/cpufreq/cpufreq-mediatek-hw.yaml


See https://patchwork.ozlabs.org/patch/1413865

The base for the patch is generally the last rc1. Any dependencies
should be noted.

If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure 'yamllint' is installed and dt-schema is up to
date:

pip3 install dtschema --upgrade

Please check and re-submit.

Patch

diff --git a/Documentation/devicetree/bindings/cpufreq/cpufreq-mediatek-hw.yaml b/Documentation/devicetree/bindings/cpufreq/cpufreq-mediatek-hw.yaml
new file mode 100644
index 0000000..1ce2a17
--- /dev/null
+++ b/Documentation/devicetree/bindings/cpufreq/cpufreq-mediatek-hw.yaml
@@ -0,0 +1,112 @@ 
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/cpufreq/cpufreq-mediatek-hw.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: MediaTek's CPUFREQ Bindings
+
+maintainers:
+  - Hector Yuan <[e-mail]>
+
+description:
+  CPUFREQ HW is a hardware engine used by MediaTek
+  SoCs to manage frequency in hardware. It is capable of controlling frequency
+  for multiple clusters.
+
+properties:
+  compatible:
+    const: mediatek,cpufreq-hw
+
+  reg:
+    minItems: 1
+    maxItems: 2
+    description: |
+      Addresses and sizes for the memory of the HW bases in each frequency domain.
+
+required:
+  - compatible
+  - reg
+
+examples:
+  - |
+    cpus {
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            cpu0: cpu@0 {
+                device_type = "cpu";
+                compatible = "arm,cortex-a55";
+                enable-method = "psci";
+                performance-domains = <&performance 0>;
+                reg = <0x000>;
+            };
+
+            cpu1: cpu@100 {
+                device_type = "cpu";
+                compatible = "arm,cortex-a55";
+                enable-method = "psci";
+                performance-domains = <&performance 0>;
+                reg = <0x100>;
+            };
+
+            cpu2: cpu@200 {
+                device_type = "cpu";
+                compatible = "arm,cortex-a55";
+                enable-method = "psci";
+                performance-domains = <&performance 0>;
+                reg = <0x200>;
+            };
+
+            cpu3: cpu@300 {
+                device_type = "cpu";
+                compatible = "arm,cortex-a55";
+                enable-method = "psci";
+                performance-domains = <&performance 0>;
+                reg = <0x300>;
+            };
+
+            cpu4: cpu@400 {
+                device_type = "cpu";
+                compatible = "arm,cortex-a55";
+                enable-method = "psci";
+                performance-domains = <&performance 1>;
+                reg = <0x400>;
+            };
+
+            cpu5: cpu@500 {
+                device_type = "cpu";
+                compatible = "arm,cortex-a55";
+                enable-method = "psci";
+                performance-domains = <&performance 1>;
+                reg = <0x500>;
+            };
+
+            cpu6: cpu@600 {
+                device_type = "cpu";
+                compatible = "arm,cortex-a75";
+                enable-method = "psci";
+                performance-domains = <&performance 1>;
+                reg = <0x600>;
+            };
+
+            cpu7: cpu@700 {
+                device_type = "cpu";
+                compatible = "arm,cortex-a75";
+                enable-method = "psci";
+                performance-domains = <&performance 1>;
+                reg = <0x700>;
+            };
+    };
+
+    /* ... */
+
+    soc {
+        #address-cells = <2>;
+        #size-cells = <2>;
+        performance: performance-controller@11bc00 {
+            compatible = "mediatek,cpufreq-hw";
+            reg = <0 0x0011bc10 0 0x120>, <0 0x0011bd30 0 0x120>;
+            #performance-domain-cells = <1>;
+        };
+    };