linux-kernel - Re: [PATCH 3/5] arm64: dts: qcom: r0q: enable max77705 PMIC

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <823af9ee-df4e-40de-bf30-084442bb1d2c@oss.qualcomm.com>
Date: Wed, 8 Oct 2025 10:34:00 +0200
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Eric Gonçalves <ghatto404@...il.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: devicetree@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/5] arm64: dts: qcom: r0q: enable max77705 PMIC

On 9/26/25 4:19 AM, Eric Gonçalves wrote:
> 
> 
> On September 25, 2025 10:06:53 AM GMT-03:00, Konrad Dybcio <konrad.dybcio@....qualcomm.com> wrote:
>> On 9/20/25 3:46 AM, Eric Gonçalves wrote:
>>> The Samsung Galaxy S22 uses max77705 as its charger, fuelgauge and haptic
>>> PMIC, enable the fuelgauge and charger for now.
>>>
>>> Signed-off-by: Eric Gonçalves <ghatto404@...il.com>
>>> ---
>>
>> [...]
>>
>>> +&i2c5 {
>>> +	status = "okay";
>>> +
>>> +	max77705_charger: charger@69 {
>>> +	    compatible = "maxim,max77705-charger";
>>> +	    reg = <0x69>;
>>
>> Please use tabs consistently
> Sure
>>
>>> +	    monitored-battery = <&battery>;
>>> +	    interrupt-parent = <&tlmm>;
>>> +	    interrupts = <5 IRQ_TYPE_LEVEL_LOW>;
>>
>> interrupts-extended = <&tlmm 5 IRQ...>, here and below
> why extended?
>>
>>> +	};
>>> +
>>> +	fuel-gauge@36 {
>>> +		reg = <0x36>;
>>
>> sorting by unit address is welcome
> Sure
>>
>>> +		compatible = "maxim,max77705-battery";
>>> +		power-supplies = <&max77705_charger>;
>>> +		interrupt-parent = <&tlmm>;
>>> +		interrupts = <5 IRQ_TYPE_LEVEL_LOW>;
>>> +	};
>>
>> These nodes should be children of "maxim,max77705"
>> (see drivers/mfd/max77705.c)
> What do you mean by this? I looked at the driver, 
> should I add the pmic@66 node and put
> the units inside of it? Because starqltechn doesn't do that and
> places them outside. Also, by adding the
> pmic@66
> node it expects to have led/haptics nodes as well.

Well, the chip comes as a single package, so this only makes sense
and the bindings (mfd/maxim,max77705.yaml) corroborate that.

Just looking at the YAML, you should be able to omit the LED part
if it's not connected anywhere

Konrad