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# SPDX-License-Identifier: GPL-2.0
%YAML 1.2
---
$id: http://devicetree.org/schemas/opp/allwinner,sun50i-h6-operating-points.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Allwinner H6 CPU OPP
maintainers:
- Chen-Yu Tsai <wens@csie.org>
- Maxime Ripard <mripard@kernel.org>
description: |
For some SoCs, the CPU frequency subset and voltage value of each
OPP varies based on the silicon variant in use. Allwinner Process
Voltage Scaling Tables define the voltage and frequency values based
on the speedbin blown in the efuse combination.
allOf:
- $ref: opp-v2-base.yaml#
properties:
compatible:
enum:
- allwinner,sun50i-h6-operating-points
- allwinner,sun50i-h616-operating-points
nvmem-cells:
description: |
A phandle pointing to a nvmem-cells node representing the efuse
register that has information about the speedbin that is used
to select the right frequency/voltage value pair. Please refer
to the nvmem-cells bindings in
Documentation/devicetree/bindings/nvmem/nvmem.yaml and also the
examples below.
opp-shared: true
required:
- compatible
- nvmem-cells
patternProperties:
"^opp-[0-9]+$":
type: object
properties:
opp-hz: true
clock-latency-ns: true
opp-microvolt: true
opp-supported-hw:
maxItems: 1
description:
A single 32 bit bitmap value, representing compatible HW, one
bit per speed bin index.
patternProperties:
"^opp-microvolt-speed[0-9]$": true
required:
- opp-hz
unevaluatedProperties: false
additionalProperties: false
examples:
- |
cpu_opp_table: opp-table {
compatible = "allwinner,sun50i-h6-operating-points";
nvmem-cells = <&speedbin_efuse>;
opp-shared;
opp-480000000 {
clock-latency-ns = <244144>; /* 8 32k periods */
opp-hz = /bits/ 64 <480000000>;
opp-microvolt-speed0 = <880000>;
opp-microvolt-speed1 = <820000>;
opp-microvolt-speed2 = <800000>;
};
opp-1080000000 {
clock-latency-ns = <244144>; /* 8 32k periods */
opp-hz = /bits/ 64 <1080000000>;
opp-microvolt-speed0 = <1060000>;
opp-microvolt-speed1 = <880000>;
opp-microvolt-speed2 = <840000>;
};
opp-1488000000 {
clock-latency-ns = <244144>; /* 8 32k periods */
opp-hz = /bits/ 64 <1488000000>;
opp-microvolt-speed0 = <1160000>;
opp-microvolt-speed1 = <1000000>;
opp-microvolt-speed2 = <960000>;
};
};
- |
opp-table {
compatible = "allwinner,sun50i-h616-operating-points";
nvmem-cells = <&speedbin_efuse>;
opp-shared;
opp-480000000 {
clock-latency-ns = <244144>; /* 8 32k periods */
opp-hz = /bits/ 64 <480000000>;
opp-microvolt = <900000>;
opp-supported-hw = <0x1f>;
};
opp-792000000 {
clock-latency-ns = <244144>; /* 8 32k periods */
opp-hz = /bits/ 64 <792000000>;
opp-microvolt-speed1 = <900000>;
opp-microvolt-speed4 = <940000>;
opp-supported-hw = <0x12>;
};
opp-1512000000 {
clock-latency-ns = <244144>; /* 8 32k periods */
opp-hz = /bits/ 64 <1512000000>;
opp-microvolt = <1100000>;
opp-supported-hw = <0x0a>;
};
};
...
|
