[TEGRA194_CPUFREQ,v3,1/4] dt-bindings: arm: Add t194 ccplex compatible and bpmp property

Message ID 1592775274-27513-2-git-send-email-sumitg@nvidia.com
State New
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  • [TEGRA194_CPUFREQ,v3,1/4] dt-bindings: arm: Add t194 ccplex compatible and bpmp property
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Commit Message

Sumit Gupta June 21, 2020, 9:34 p.m.
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(+)

Patch

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: