linux-kernel - [PATCH v4 1/3] dt-bindings: cpufreq: cpufreq-qcom-hw: Add cpufreq clock provider

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Message-Id: <20221102090818.65321-2-manivannan.sadhasivam@linaro.org>
Date:   Wed,  2 Nov 2022 14:38:16 +0530
From:   Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To:     andersson@...nel.org, viresh.kumar@...aro.org,
        krzysztof.kozlowski+dt@...aro.org, rafael@...nel.org,
        robh+dt@...nel.org
Cc:     johan@...nel.org, devicetree@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-pm@...r.kernel.org,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        Rob Herring <robh@...nel.org>
Subject: [PATCH v4 1/3] dt-bindings: cpufreq: cpufreq-qcom-hw: Add cpufreq clock provider

Qualcomm platforms making use of CPUFreq HW Engine (EPSS/OSM) supply clocks
to the CPU cores. Document the same in the binding to reflect the actual
implementation.

CPUFreq HW will become the clock provider and CPU cores will become the
clock consumers.

The clock index for each CPU core is based on the frequency domain index.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Reviewed-by: Rob Herring <robh@...nel.org>
---
 .../devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml b/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml
index 24fa3d87a40b..9ac8ad5b71b5 100644
--- a/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml
+++ b/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml
@@ -56,6 +56,9 @@ properties:
   '#freq-domain-cells':
     const: 1
 
+  '#clock-cells':
+    const: 1
+
 required:
   - compatible
   - reg
@@ -83,6 +86,7 @@ examples:
         enable-method = "psci";
         next-level-cache = <&L2_0>;
         qcom,freq-domain = <&cpufreq_hw 0>;
+        clocks = <&cpufreq_hw 0>;
         L2_0: l2-cache {
           compatible = "cache";
           next-level-cache = <&L3_0>;
@@ -99,6 +103,7 @@ examples:
         enable-method = "psci";
         next-level-cache = <&L2_100>;
         qcom,freq-domain = <&cpufreq_hw 0>;
+        clocks = <&cpufreq_hw 0>;
         L2_100: l2-cache {
           compatible = "cache";
           next-level-cache = <&L3_0>;
@@ -112,6 +117,7 @@ examples:
         enable-method = "psci";
         next-level-cache = <&L2_200>;
         qcom,freq-domain = <&cpufreq_hw 0>;
+        clocks = <&cpufreq_hw 0>;
         L2_200: l2-cache {
           compatible = "cache";
           next-level-cache = <&L3_0>;
@@ -125,6 +131,7 @@ examples:
         enable-method = "psci";
         next-level-cache = <&L2_300>;
         qcom,freq-domain = <&cpufreq_hw 0>;
+        clocks = <&cpufreq_hw 0>;
         L2_300: l2-cache {
           compatible = "cache";
           next-level-cache = <&L3_0>;
@@ -138,6 +145,7 @@ examples:
         enable-method = "psci";
         next-level-cache = <&L2_400>;
         qcom,freq-domain = <&cpufreq_hw 1>;
+        clocks = <&cpufreq_hw 1>;
         L2_400: l2-cache {
           compatible = "cache";
           next-level-cache = <&L3_0>;
@@ -151,6 +159,7 @@ examples:
         enable-method = "psci";
         next-level-cache = <&L2_500>;
         qcom,freq-domain = <&cpufreq_hw 1>;
+        clocks = <&cpufreq_hw 1>;
         L2_500: l2-cache {
           compatible = "cache";
           next-level-cache = <&L3_0>;
@@ -164,6 +173,7 @@ examples:
         enable-method = "psci";
         next-level-cache = <&L2_600>;
         qcom,freq-domain = <&cpufreq_hw 1>;
+        clocks = <&cpufreq_hw 1>;
         L2_600: l2-cache {
           compatible = "cache";
           next-level-cache = <&L3_0>;
@@ -177,6 +187,7 @@ examples:
         enable-method = "psci";
         next-level-cache = <&L2_700>;
         qcom,freq-domain = <&cpufreq_hw 1>;
+        clocks = <&cpufreq_hw 1>;
         L2_700: l2-cache {
           compatible = "cache";
           next-level-cache = <&L3_0>;
@@ -197,6 +208,7 @@ examples:
         clock-names = "xo", "alternate";
 
         #freq-domain-cells = <1>;
+        #clock-cells = <1>;
       };
     };
 ...
-- 
2.25.1