Re: [PATCH RESEND v2 1/9] dt-bindings: clk: qcom: msm8996-apcc: Add CBF

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On 18/04/2022 21:12, Yassine Oudjana wrote:
> 
> On Mon, Apr 18 2022 at 18:04:08 +0200, Krzysztof Kozlowski 
> <krzysztof.kozlowski@xxxxxxxxxx> wrote:
>> On 16/04/2022 04:56, Yassine Oudjana wrote:
>>>  Add CBF clock and reg.
>>>
>>>  Signed-off-by: Yassine Oudjana <y.oudjana@xxxxxxxxxxxxxx>
>>>  Acked-by: Rob Herring <robh@xxxxxxxxxx>
>>>  ---
>>>   .../devicetree/bindings/clock/qcom,msm8996-apcc.yaml   | 10 
>>> ++++++----
>>>   1 file changed, 6 insertions(+), 4 deletions(-)
>>>
>>>  diff --git 
>>> a/Documentation/devicetree/bindings/clock/qcom,msm8996-apcc.yaml 
>>> b/Documentation/devicetree/bindings/clock/qcom,msm8996-apcc.yaml
>>>  index a20cb10636dd..325f8aef53b2 100644
>>>  --- a/Documentation/devicetree/bindings/clock/qcom,msm8996-apcc.yaml
>>>  +++ b/Documentation/devicetree/bindings/clock/qcom,msm8996-apcc.yaml
>>>  @@ -10,8 +10,8 @@ maintainers:
>>>     - Loic Poulain <loic.poulain@xxxxxxxxxx>
>>>
>>>   description: |
>>>  -  Qualcomm CPU clock controller for MSM8996 CPUs, clock 0 is for 
>>> Power cluster
>>>  -  and clock 1 is for Perf cluster.
>>>  +  Qualcomm CPU clock controller for MSM8996 CPUs, clock 0 is for 
>>> Power cluster,
>>>  +  clock 1 is for Perf cluster, and clock 2 is for Coherent bus 
>>> fabric (CBF).
>>>
>>>   properties:
>>>     compatible:
>>>  @@ -19,7 +19,9 @@ properties:
>>>         - qcom,msm8996-apcc
>>>
>>>     reg:
>>>  -    maxItems: 1
>>>  +    items:
>>>  +      - description: Cluster clock registers
>>>  +      - description: CBF clock registers
>>
>> This breaks the ABI (which might be okay or might be not, but was not
>> mentioned in the commit) and breaks existing DTSes. Please fix them
>> before this patch.
> 
> This is only documenting changes made in an earlier patch[1] this
> series depends on,

So this other patch breaks the ABI. Was it accepted? The patch you wrote
here should go together with the clock change.

>  and the DTSes are fixed in another patch[2] that
> is also listed as a dependency in the cover letter (both patches
> aren't applied yet). Shouldn't the ABI changes should be mentioned in
> those patches instead?

They should be mentioned in the clock driver or here, because usually
they come together. :)

Best regards,
Krzysztof



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