linux-kernel - [PATCH 2/4] dt-bindings: cpufreq: mediatek: add mt8186 cpufreq dt-bindings

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Message-ID: <20220307122151.11666-3-jia-wei.chang@mediatek.com>
Date:   Mon, 7 Mar 2022 20:21:49 +0800
From:   Tim Chang <jia-wei.chang@...iatek.com>
To:     "Rafael J . Wysocki" <rafael@...nel.org>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Jia-Wei Chang <jia-wei.chang@...iatek.com>
CC:     <linux-pm@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>, <fan.chen@...iatek.com>,
        <louis.yu@...iatek.com>, <roger.lu@...iatek.com>,
        <Allen-yy.Lin@...iatek.com>,
        <Project_Global_Chrome_Upstream_Group@...iatek.com>,
        <hsinyi@...gle.com>,
        Jia-Wei Chang <jia-wei.chang@...iatek.corp-partner.google.com>
Subject: [PATCH 2/4] dt-bindings: cpufreq: mediatek: add mt8186 cpufreq dt-bindings

1. add cci property.
2. add example of MT8186.

Signed-off-by: Jia-Wei Chang <jia-wei.chang@...iatek.corp-partner.google.com>
---
 .../bindings/cpufreq/cpufreq-mediatek.yaml    | 41 +++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/Documentation/devicetree/bindings/cpufreq/cpufreq-mediatek.yaml b/Documentation/devicetree/bindings/cpufreq/cpufreq-mediatek.yaml
index 584946eb3790..d3ce17fd8fcf 100644
--- a/Documentation/devicetree/bindings/cpufreq/cpufreq-mediatek.yaml
+++ b/Documentation/devicetree/bindings/cpufreq/cpufreq-mediatek.yaml
@@ -48,6 +48,10 @@ properties:
       When absent, the voltage scaling flow is handled by hardware, hence no
       software "voltage tracking" is needed.
 
+  cci:
+    description:
+      Phandle of the cci to be linked with the phandle of CPU if present.
+
   "#cooling-cells":
     description:
       For details, please refer to
@@ -129,3 +133,40 @@ examples:
       /* ... */
 
     };
+
+  - |
+    /* Example 3 (MT8186 SoC) */
+    #include <dt-bindings/clock/mt8186-clk.h>
+    cluster0_opp: opp-table-0 {
+      compatible = "operating-points-v2";
+      opp-shared;
+      opp0_00: opp-500000000 {
+        opp-hz = /bits/ 64 <500000000>;
+        opp-microvolt = <600000>;
+        opp-level = <15>;
+        required-opps = <&opp2_00>;
+      };
+
+      /* ... */
+
+    };
+
+    cpus {
+      #address-cells = <1>;
+      #size-cells = <0>;
+      cpu1: cpu@1 {
+        device_type = "cpu";
+        compatible = "arm,cortex-a55";
+        reg = <0x0100>;
+        enable-method = "psci";
+        clocks = <&mcusys CLK_MCU_ARMPLL_LL_SEL>, <&apmixedsys CLK_APMIXED_MAINPLL>;
+        clock-names = "cpu", "intermediate";
+        operating-points-v2 = <&cluster0_opp>;
+        proc-supply = <&mt6358_vproc12_reg>;
+        sram-supply = <&mt6358_vsram_proc12_reg>;
+        cci = <&cci>;
+      };
+
+      /* ... */
+
+    };
-- 
2.18.0