[TEGRA194_CPUFREQ PATCH v4 1/4] dt-bindings: arm: Add t194 ccplex compatible and bpmp property

Sumit Gupta
2020-06-26T15:44:13Z

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