[PATCH v8 06/34] dt-bindings: clock: tegra-car: Document new tegra-clocks sub-node

Dmitry Osipenko
2021-08-17T01:30:29Z

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@gmail.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..7f5cd27e4ce0 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:
+ allOf:
+ - items:
+ - enum:
+ - nvidia,tegra20-sclk
+ - nvidia,tegra30-sclk
+ - nvidia,tegra30-pllc
+ - nvidia,tegra30-plle
+ - nvidia,tegra30-pllm
+ - const: 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@c5004000 {
--
2.32.0