linux-kernel - Re: [PATCH v2 5/5] arm64: boot: dts: qcom: sc8280xp: Add in CAMCC for sc8280xp

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Date:   Mon, 2 Oct 2023 11:56:04 +0200
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
        andersson@...nel.org, agross@...nel.org, mturquette@...libre.com,
        sboyd@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
        jonathan@...ek.ca, quic_tdas@...cinc.com,
        vladimir.zapolskiy@...aro.org
Cc:     linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 5/5] arm64: boot: dts: qcom: sc8280xp: Add in CAMCC for
 sc8280xp



On 10/1/23 01:01, Bryan O'Donoghue wrote:
> On 30/09/2023 17:41, Konrad Dybcio wrote:
>>
>>
>> On 9/30/23 15:41, Bryan O'Donoghue wrote:
>>> Add in CAMCC for sc8280xp. The sc8280xp Camera Clock Controller looks
>>> similar to most of the sdmX, smX and now scX controllers.
>>>
>>> Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@...aro.org>
>>> ---
>>>   arch/arm64/boot/dts/qcom/sc8280xp.dtsi | 16 ++++++++++++++++
>>>   1 file changed, 16 insertions(+)
>>>
>>> diff --git a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi 
>>> b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
>>> index cad59af7ccef..ca43d038578b 100644
>>> --- a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
>>> +++ b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
>>> @@ -8,6 +8,7 @@
>>>   #include <dt-bindings/clock/qcom,gcc-sc8280xp.h>
>>>   #include <dt-bindings/clock/qcom,gpucc-sc8280xp.h>
>>>   #include <dt-bindings/clock/qcom,rpmh.h>
>>> +#include <dt-bindings/clock/qcom,sc8280xp-camcc.h>
>>>   #include <dt-bindings/clock/qcom,sc8280xp-lpasscc.h>
>>>   #include <dt-bindings/interconnect/qcom,osm-l3.h>
>>>   #include <dt-bindings/interconnect/qcom,sc8280xp.h>
>>> @@ -3450,6 +3451,21 @@ usb_1_role_switch: endpoint {
>>>               };
>>>           };
>>> +        camcc: clock-controller@...0000 {
>>> +            compatible = "qcom,sc8280xp-camcc";
>>> +            reg = <0 0x0ad00000 0 0x20000>;
>>> +            clocks = <&gcc GCC_CAMERA_AHB_CLK>,
>>> +                 <&rpmhcc RPMH_CXO_CLK>,
>>> +                 <&rpmhcc RPMH_CXO_CLK_A>,
>>> +                 <&sleep_clk>;
>>> +            clock-names = "iface", "bi_tcxo", "bi_tcxo_ao", 
>>> "sleep_clk";
>> clock-names is now redundant :)
>>
>> Reviewed-by: Konrad Dybcio <konrad.dybcio@...aro.org>
>>
>> Konrad
> 
> BTW.
> 
> Looking at the block diagram for the Camera, I see why Cam_CC_AHB is 
> included in this list. Its not called out as a dependency in the clock 
> tree but when you look at the block diagram you can see it gates the AHB 
> bus to the CAM_CC block.
Yep, that's why using is as pm_clk for the clock controller makes sense

Konrad