Re: [PATCH v2 3/8] dt-bindings: clock: Add YAML schemas for the QCOM GPUCC clock bindings

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On 11/26/2019 11:41 PM, Stephen Boyd wrote:
Quoting Jeffrey Hugo (2019-11-15 07:11:01)
On Fri, Nov 15, 2019 at 3:07 AM Taniya Das <tdas@xxxxxxxxxxxxxx> wrote:
diff --git a/Documentation/devicetree/bindings/clock/qcom,gpucc.yaml b/Documentation/devicetree/bindings/clock/qcom,gpucc.yaml
new file mode 100644
index 0000000..c2d6243
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/qcom,gpucc.yaml
@@ -0,0 +1,69 @@
+# SPDX-License-Identifier: GPL-2.0-only
+%YAML 1.2
+title: Qualcomm Graphics Clock & Reset Controller Binding
+  - Taniya Das <tdas@xxxxxxxxxxxxxx>
+description: |
+  Qualcomm grpahics clock control module which supports the clocks, resets and
+  power domains.
+  compatible:
+    enum:
+      - qcom,msm8998-gpucc
+      - qcom,sdm845-gpucc
+  clocks:
+    minItems: 1
+    maxItems: 2
+    items:
+      - description: Board XO source
+      - description: GPLL0 source from GCC

This is not an accurate conversion.  GPLL0 was not valid for 845, and
is required for 8998.

Thanks for checking Jeff.

It looks like on 845 there are two gpll0 clocks going to gpucc. From


There are branches of GPLL0 which would be connected to most external CCs. It is upto to the external CCs to either use them to source a frequency or not.

QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation.


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