linux-kernel - Re: [PATCH 2/2] clk: qcom: lpasscc: Add resets for SC7280 audioreach clock controller

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Message-ID: <dd9ff450-917d-792d-debc-a504ff6ca8bd@quicinc.com>
Date:   Mon, 26 Dec 2022 11:10:23 +0530
From:   Srinivasa Rao Mandadapu <quic_srivasam@...cinc.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        <swboyd@...omium.org>, <agross@...nel.org>, <andersson@...nel.org>,
        <robh+dt@...nel.org>, <broonie@...nel.org>,
        <quic_plai@...cinc.com>, <krzysztof.kozlowski+dt@...aro.org>,
        <konrad.dybcio@...ainline.org>, <mturquette@...libre.com>,
        <sboyd@...nel.org>, <linux-arm-msm@...r.kernel.org>,
        <linux-clk@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <quic_rohkumar@...cinc.com>
Subject: Re: [PATCH 2/2] clk: qcom: lpasscc: Add resets for SC7280 audioreach
 clock controller


On 12/22/2022 4:14 PM, Krzysztof Kozlowski wrote:
Thanks for Your Time Krzyszto!!!
> On 21/12/2022 14:18, Srinivasa Rao Mandadapu wrote:
>> On 12/21/2022 4:09 PM, Krzysztof Kozlowski wrote:
>> Thanks for your time Krzysztof!!!
>>> On 21/12/2022 11:21, Srinivasa Rao Mandadapu wrote:
>>>> The clock gating control for TX/RX/WSA core bus clocks would be required
>>>> to be reset(moved from hardware control) from audio core driver. Thus
>>>> add the support for the reset clocks in audioreach based clock driver.
>>>>
>>>> Signed-off-by: Srinivasa Rao Mandadapu <quic_srivasam@...cinc.com>
>>>> ---
>>>>    drivers/clk/qcom/lpasscc-sc7280.c | 18 ++++++++++++++++++
>>>>    1 file changed, 18 insertions(+)
>>>>
>>>> diff --git a/drivers/clk/qcom/lpasscc-sc7280.c b/drivers/clk/qcom/lpasscc-sc7280.c
>>>> index 5c1e17b..d81d81b 100644
>>>> --- a/drivers/clk/qcom/lpasscc-sc7280.c
>>>> +++ b/drivers/clk/qcom/lpasscc-sc7280.c
>>>> @@ -12,10 +12,12 @@
>>>>    #include <linux/regmap.h>
>>>>    
>>>>    #include <dt-bindings/clock/qcom,lpass-sc7280.h>
>>>> +#include <dt-bindings/clock/qcom,lpassaudiocc-sc7280.h>
>>> These are bindings for different device.
>> They are not exactly for different device. It's for same device with
>> ADSP enabled platforms.
>>
>> Basically lpassaudiocc-sc7280.c and lpasscorecc-sc7280.c are for legacy
>> path.
>>
>> lpasscc-sc7280.c is for ADSP based AudioReach Solution.
> I see two different devices:
> lpasscc@...0000
> clock-controller@...0000
>
> clock inputs and outputs are different, so it does not look like for
> same device.

Actually, even though there are 2 different device nodes, they are being 
used exclusively.

In ADSP enabled path(on same sc7280 based platform it's enabled for some 
vendors) only lpasscc node is being used

and legacy path nodes are being disabled due to register region conflicts.

Below is the patch for the same:
https://patchwork.kernel.org/project/linux-arm-msm/patch/1671702170-24781-8-git-send-email-quic_srivasam@quicinc.com/

>
> Best regards,
> Krzysztof
>