linux-kernel - Re: [RFC 3/3] arm64: dts: qcom: sa8775p-ride: Enable support for firmware managed resources

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Date: Tue, 5 Mar 2024 23:55:04 +0530
From: Sriram Dash <quic_sriramd@...cinc.com>
To: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        <andersson@...nel.org>, <konrad.dybcio@...aro.org>, <vkoul@...nel.org>,
        <kishon@...nel.org>, <robh@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>,
        <gregkh@...uxfoundation.org>, <quic_wcheng@...cinc.com>,
        <Thinh.Nguyen@...opsys.com>, <p.zabel@...gutronix.de>,
        <linux-arm-msm@...r.kernel.org>, <linux-phy@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <linux-usb@...r.kernel.org>,
        <quic_psodagud@...cinc.com>, <quic_nkela@...cinc.com>,
        <manivannan.sadhasivam@...aro.org>, <ulf.hansson@...aro.org>,
        <sudeep.holla@....com>, <quic_shazhuss@...cinc.com>,
        <devicetree@...r.kernel.org>
Subject: Re: [RFC 3/3] arm64: dts: qcom: sa8775p-ride: Enable support for
 firmware managed resources

On 3/5/2024 11:33 PM, Sriram Dash wrote:
> On 3/5/2024 10:38 PM, Krzysztof Kozlowski wrote:
>> On 05/03/2024 17:57, Sriram Dash wrote:
>>> Establish the channel and domain mapping for the power domains to 
>>> connect
>>> with firmware, enabling the firmware to handle the assigned resources.
>>> Since these delegated resources will remain invisible to the operating
>>> system, ensure that any references to them are removed.
>>>
>>> Signed-off-by: Sriram Dash <quic_sriramd@...cinc.com>
>>> ---
>>>   arch/arm64/boot/dts/qcom/sa8775p-ride.dts | 96 
>>> +++++++++++++++++++++++++------
>>>   1 file changed, 77 insertions(+), 19 deletions(-)
>>
>> Do not mix DTS patches with submissions to netdev or USB.
>>
>> Please put it inside your internal guides, so you will not be repeating
>> this over and over.
>>
> 
> Sure. Will take care. Thanks.
> 
>>>
>>> diff --git a/arch/arm64/boot/dts/qcom/sa8775p-ride.dts 
>>> b/arch/arm64/boot/dts/qcom/sa8775p-ride.dts
>>> index 26ad05b..b6c9cac 100644
>>> --- a/arch/arm64/boot/dts/qcom/sa8775p-ride.dts
>>> +++ b/arch/arm64/boot/dts/qcom/sa8775p-ride.dts
>>> @@ -764,8 +764,18 @@
>>>   };
>>>   &usb_0 {
>>> -    pinctrl-names = "default";
>>> -    pinctrl-0 = <&usb0_en_state>;
>>> +    /delete-property/ clocks;
>>> +    /delete-property/ clock-names;
>>> +    /delete-property/ assigned-clocks;
>>> +    /delete-property/ assigned-clock-rates;
>>> +    /delete-property/ required-opps;
>>> +    /delete-property/ resets;
>>> +    /delete-property/ interconnects;
>>> +    /delete-property/ interconnect-names;
>>> +
>>> +    power-domains = <TODO>, <TODO>;
>>
>> This wasn't even tested.
>>
> 
> This is tested with the specific power domains in place
> of <TODO>. SCMI interface is used for the power domains.
> 
>> Best regards,
>> Krzysztof
>>