linux-kernel - Re: [PATCH 2/2] arm64: dts: qcom: sa8775p: Add TCSR halt register space

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Message-ID: <a9cfb48f-7dcc-4582-a677-3abac0295630@quicinc.com>
Date: Mon, 29 Jul 2024 18:50:56 +0800
From: Tengfei Fan <quic_tengfan@...cinc.com>
To: Mukesh Ojha <quic_mojha@...cinc.com>,
        Krzysztof Kozlowski
	<krzk@...nel.org>
CC: <lee@...nel.org>, <robh@...nel.org>, <krzk+dt@...nel.org>,
        <conor+dt@...nel.org>, <andersson@...nel.org>,
        <konrad.dybcio@...aro.org>, <linux-arm-msm@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <kernel@...cinc.com>
Subject: Re: [PATCH 2/2] arm64: dts: qcom: sa8775p: Add TCSR halt register
 space



On 7/9/2024 12:08 AM, Mukesh Ojha wrote:
> On Sun, Jul 07, 2024 at 02:46:59PM +0200, Krzysztof Kozlowski wrote:
>> On 05/07/2024 17:32, Mukesh Ojha wrote:
>>> Enable download mode for sa8775p which can help collect
>>> ramdump for this SoC.
>>>
>>> Signed-off-by: Mukesh Ojha <quic_mojha@...cinc.com>
>>> ---
>>>   arch/arm64/boot/dts/qcom/sa8775p.dtsi | 6 ++++++
>>>   1 file changed, 6 insertions(+)
>>>
>>> diff --git a/arch/arm64/boot/dts/qcom/sa8775p.dtsi b/arch/arm64/boot/dts/qcom/sa8775p.dtsi
>>> index 23f1b2e5e624..a46d00b1ddda 100644
>>> --- a/arch/arm64/boot/dts/qcom/sa8775p.dtsi
>>> +++ b/arch/arm64/boot/dts/qcom/sa8775p.dtsi
>>> @@ -221,6 +221,7 @@ eud_in: endpoint {
>>>   	firmware {
>>>   		scm {
>>>   			compatible = "qcom,scm-sa8775p", "qcom,scm";
>>> +			qcom,dload-mode = <&tcsr 0x13000>;
>>>   			memory-region = <&tz_ffi_mem>;
>>>   		};
>>>   	};
>>> @@ -2824,6 +2825,11 @@ tcsr_mutex: hwlock@...0000 {
>>>   			#hwlock-cells = <1>;
>>>   		};
>>>   
>>> +		tcsr: syscon@...0000 {
>>> +			compatible = "qcom,sa8775p-tcsr", "syscon";
>>
>> The file is going away. This change is very confusing.
>>
>> Please align first with your colleagues instead of sending conflicting
>> work without any explanation.
> 
> Sure, let me check with Tengfei if this can be sent along with his patches.
> 
> -Mukesh

After considering the feedback provided on the subject, We have decided
to keep current SA8775p compatible and ABI compatibility in drivers.
Therefore, this patch is still needed, please continue to review this
patch.
Thank you for your input.

-- 
Thx and BRs,
Tengfei Fan