linux-kernel - Re: [PATCH 2/2] arm64: dts: qcom: qcs8300-ride: Enable PMIC peripherals

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Message-ID: <2b1a1d32-7bd0-4062-ad55-f2346ffcc205@quicinc.com>
Date: Wed, 8 Jan 2025 11:55:35 +0800
From: Tingguo Cheng <quic_tingguoc@...cinc.com>
To: Konrad Dybcio <konrad.dybcio@....qualcomm.com>,
        <quic_fenglinw@...cinc.com>, <quic_tingweiz@...cinc.com>,
        <kernel@...cinc.com>, Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio
	<konradybcio@...nel.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski
	<krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>
CC: <linux-arm-msm@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] arm64: dts: qcom: qcs8300-ride: Enable PMIC
 peripherals



On 11/29/2024 7:30 PM, Konrad Dybcio wrote:
> On 29.11.2024 12:14 PM, Konrad Dybcio wrote:
>> On 26.11.2024 10:35 AM, Tingguo Cheng wrote:
>>> Enable PMIC and PMIC peripherals for qcs8300-ride board. The qcs8
>>> 300-ride uses 2 pmics(pmm8620au:0,pmm8650au:1) on the board, which
>>> are variants of pmm8654au used on sa8775p/qcs9100 -ride(4x pmics).
>>>
>>> Signed-off-by: Tingguo Cheng <quic_tingguoc@...cinc.com>
>>> ---
>>>   arch/arm64/boot/dts/qcom/qcs8300-ride.dts | 23 +++++++++++++++++++++++
>>>   1 file changed, 23 insertions(+)
>>>
>>> diff --git a/arch/arm64/boot/dts/qcom/qcs8300-ride.dts b/arch/arm64/boot/dts/qcom/qcs8300-ride.dts
>>> index 7eed19a694c39dbe791afb6a991db65acb37e597..9447efb9cd01654b74ec4c18dec58b1956ffe710 100644
>>> --- a/arch/arm64/boot/dts/qcom/qcs8300-ride.dts
>>> +++ b/arch/arm64/boot/dts/qcom/qcs8300-ride.dts
>>> @@ -9,6 +9,7 @@
>>>   #include <dt-bindings/regulator/qcom,rpmh-regulator.h>
>>>   
>>>   #include "qcs8300.dtsi"
>>> +#include "sa8775p-pmics.dtsi"
>>>   / {
>>>   	model = "Qualcomm Technologies, Inc. QCS8300 Ride";
>>>   	compatible = "qcom,qcs8300-ride", "qcom,qcs8300";
>>> @@ -223,6 +224,28 @@ &gcc {
>>>   		 <0>;
>>>   };
>>>   
>>> +&pmm8654au_0_pon_resin{
>>> +	linux,code = <KEY_VOLUMEDOWN>;
>>> +
>>> +	status = "okay";
>>> +};
>>> +
>>> +&pmm8654au_2{
>>> +	status = "disabled";
>>> +};
>>> +
>>> +&pmm8654au_2_thermal{
>>> +	status = "disabled";
>>> +};
>>> +
>>> +&pmm8654au_3{
>>> +	status = "disabled";
>>> +};
>>> +
>>> +&pmm8654au_3_thermal{
>>> +	status = "disabled";
>>> +};
>>
>> Are all these PMICs absent?
 >
Yes, sa8775p/qcs9100 -ride devices get 4 pmics inside, but qcs8300-ride 
gets only 2 pmics inside(0 and 1). So pmm8654au_2 and pmm8654au_3 are 
going to be removed to align with the board configuration.
> 
> OK I re-read the commit message..
> 
> Disabling a lot of things usually points to a backwards approach,
> are there any other PMICs on board?
 >
No any other PMICs on board. There are only 2 PMICs on this type of 
board. And the 2 PMICs is the variant of the PMICs used on 
sa8775p/qcs9100 -ride. From this perspective, just like qcs615-ride 
device, so I reused the original xxx-pmics.dtsi to reflect the 
relationship of "variant".

> 
> Konrad

-- 
Thank you & BRs
Tingguo