[TEGRA194_CPUFREQ PATCH v4 1/4] dt-bindings: arm: Add t194 ccplex compatible and bpmp property
From: Sumit Gupta <sumitg@nvidia.com>
Date: 2020-06-26 15:44:13
Also in:
linux-devicetree, linux-pm, linux-tegra, lkml
Subsystem:
open firmware and flattened device tree bindings, the rest · Maintainers:
Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
To do frequency scaling on all CPUs within T194 CPU Complex, we need to query BPMP for data on valid operating points. Document a compatible string under 'cpus' node to represent the CPU Complex for binding drivers like cpufreq which don't have their node or CPU Complex node to bind to. Also, document a property to point to the BPMP device that can be queried for all CPUs. Signed-off-by: Sumit Gupta <sumitg@nvidia.com> --- Documentation/devicetree/bindings/arm/cpus.yaml | 9 +++++++++ 1 file changed, 9 insertions(+)
diff --git a/Documentation/devicetree/bindings/arm/cpus.yaml b/Documentation/devicetree/bindings/arm/cpus.yaml
index a018147..737b55e 100644
--- a/Documentation/devicetree/bindings/arm/cpus.yaml
+++ b/Documentation/devicetree/bindings/arm/cpus.yaml@@ -162,6 +162,7 @@ properties: - nvidia,tegra132-denver - nvidia,tegra186-denver - nvidia,tegra194-carmel + - nvidia,tegra194-ccplex - qcom,krait - qcom,kryo - qcom,kryo260
@@ -255,6 +256,14 @@ properties: where voltage is in V, frequency is in MHz. + nvidia,bpmp: + $ref: '/schemas/types.yaml#/definitions/phandle' + descrption: | + Specifies the bpmp node that needs to be queried to get + operating point data for all CPUs. + + Optional for NVIDIA Tegra194 Carmel CPUs + power-domains: $ref: '/schemas/types.yaml#/definitions/phandle-array' description:
--
2.7.4
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