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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /Documentation/devicetree/bindings/opp/allwinner,sun50i-h6-operating-points.yaml | |
parent | Initial commit. (diff) | |
download | linux-upstream/5.10.209.tar.xz linux-upstream/5.10.209.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | Documentation/devicetree/bindings/opp/allwinner,sun50i-h6-operating-points.yaml | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/opp/allwinner,sun50i-h6-operating-points.yaml b/Documentation/devicetree/bindings/opp/allwinner,sun50i-h6-operating-points.yaml new file mode 100644 index 000000000..aeff2bd77 --- /dev/null +++ b/Documentation/devicetree/bindings/opp/allwinner,sun50i-h6-operating-points.yaml @@ -0,0 +1,131 @@ +# 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 Device Tree Bindings + +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 defines the voltage and frequency value based + on the speedbin blown in the efuse combination. The + sun50i-cpufreq-nvmem driver reads the efuse value from the SoC to + provide the OPP framework with required information. + +properties: + compatible: + const: allwinner,sun50i-h6-operating-points + + nvmem-cells: + description: | + A phandle pointing to a nvmem-cells node representing the efuse + registers that has information about the speedbin that is used + to select the right frequency/voltage value pair. Please refer + the for nvmem-cells bindings + Documentation/devicetree/bindings/nvmem/nvmem.txt and also + examples below. + + opp-shared: true + +required: + - compatible + - nvmem-cells + +patternProperties: + "opp-[0-9]+": + type: object + + properties: + opp-hz: true + + patternProperties: + "opp-microvolt-.*": true + + required: + - opp-hz + - opp-microvolt-speed0 + - opp-microvolt-speed1 + - opp-microvolt-speed2 + + 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-720000000 { + clock-latency-ns = <244144>; /* 8 32k periods */ + opp-hz = /bits/ 64 <720000000>; + + opp-microvolt-speed0 = <880000>; + opp-microvolt-speed1 = <820000>; + opp-microvolt-speed2 = <800000>; + }; + + opp-816000000 { + clock-latency-ns = <244144>; /* 8 32k periods */ + opp-hz = /bits/ 64 <816000000>; + + opp-microvolt-speed0 = <880000>; + opp-microvolt-speed1 = <820000>; + opp-microvolt-speed2 = <800000>; + }; + + opp-888000000 { + clock-latency-ns = <244144>; /* 8 32k periods */ + opp-hz = /bits/ 64 <888000000>; + + opp-microvolt-speed0 = <940000>; + 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-1320000000 { + clock-latency-ns = <244144>; /* 8 32k periods */ + opp-hz = /bits/ 64 <1320000000>; + + opp-microvolt-speed0 = <1160000>; + opp-microvolt-speed1 = <940000>; + opp-microvolt-speed2 = <900000>; + }; + + 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>; + }; + }; + +... |