linux-kernel - [PATCH v7 05/37] dt-bindings: clock: tegra-car: Document new tegra-clocks node

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Message-Id: <20210701232728.23591-6-digetx@gmail.com>
Date:   Fri,  2 Jul 2021 02:26:56 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Viresh Kumar <vireshk@...nel.org>,
        Stephen Boyd <sboyd@...nel.org>,
        Peter De Schrijver <pdeschrijver@...dia.com>
Cc:     linux-kernel@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-pm@...r.kernel.org
Subject: [PATCH v7 05/37] dt-bindings: clock: tegra-car: Document new tegra-clocks node

Document tegra-clocks sub-node which describes Tegra SoC clocks that
require a higher voltage of the core power domain in order to operate
properly on a higher clock rates.  Each node contains a phandle to OPP
table and power domain.

The root PLLs and system clocks don't have any specific device dedicated
to them, clock controller is in charge of managing power for them.

Signed-off-by: Dmitry Osipenko <digetx@...il.com>
---
 .../bindings/clock/nvidia,tegra20-car.yaml    | 51 +++++++++++++++++++
 1 file changed, 51 insertions(+)

diff --git a/Documentation/devicetree/bindings/clock/nvidia,tegra20-car.yaml b/Documentation/devicetree/bindings/clock/nvidia,tegra20-car.yaml
index 459d2a525393..89c388782d5b 100644
--- a/Documentation/devicetree/bindings/clock/nvidia,tegra20-car.yaml
+++ b/Documentation/devicetree/bindings/clock/nvidia,tegra20-car.yaml
@@ -42,6 +42,48 @@ properties:
   "#reset-cells":
     const: 1
 
+  tegra-clocks:
+    description: child nodes are the output clocks from the CAR
+    type: object
+
+    patternProperties:
+      "^[a-z]+[0-9]+$":
+        type: object
+        properties:
+          compatible:
+            - items:
+              - enum:
+                - nvidia,tegra20-sclk
+                - nvidia,tegra30-sclk
+                - nvidia,tegra30-pllc
+                - nvidia,tegra30-plle
+                - nvidia,tegra30-pllm
+              - enum:
+                - nvidia,tegra-clock
+
+          operating-points-v2:
+            $ref: /schemas/types.yaml#/definitions/phandle
+            description:
+              Phandle to OPP table that contains frequencies, voltages and
+              opp-supported-hw property, which is a bitfield indicating
+              SoC process or speedo ID mask.
+
+          clocks:
+            items:
+              - description: node's clock
+
+          power-domains:
+            maxItems: 1
+            description: phandle to the core SoC power domain
+
+        required:
+          - compatible
+          - operating-points-v2
+          - clocks
+          - power-domains
+
+        additionalProperties: false
+
 required:
   - compatible
   - reg
@@ -59,6 +101,15 @@ examples:
         reg = <0x60006000 0x1000>;
         #clock-cells = <1>;
         #reset-cells = <1>;
+
+        tegra-clocks {
+            sclk {
+                compatible = "nvidia,tegra20-sclk", "nvidia,tegra-clock";
+                operating-points-v2 = <&opp_table>;
+                clocks = <&tegra_car TEGRA20_CLK_SCLK>;
+                power-domains = <&domain>;
+            };
+        };
     };
 
     usb-controller@...04000 {
-- 
2.30.2