linux-kernel - Re: [PATCH v2 2/3] arm64: dts: qcom: pm8916: Add BMS and charger

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Date:   Thu, 26 Oct 2023 20:54:00 +0200
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Nikita Travkin <nikita@...n.ru>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>, Lee Jones <lee@...nel.org>,
        Stephen Boyd <sboyd@...nel.org>, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        ~postmarketos/upstreaming@...ts.sr.ht
Subject: Re: [PATCH v2 2/3] arm64: dts: qcom: pm8916: Add BMS and charger



On 10/24/23 11:29, Nikita Travkin wrote:
> Konrad Dybcio писал(а) 24.10.2023 13:34:
>> On 10/23/23 08:20, Nikita Travkin wrote:
>>> pm8916 contains some hardware blocks for battery powered devices:
>>>
>>> - VM-BMS: Battery voltage monitoring block.
>>> - LBC: Linear battery charger.
>>>
>>> Add them to the pmic dtsi so the devices that make use of those blocks
>>> can enable them.
>>>
>>> Signed-off-by: Nikita Travkin <nikita@...n.ru>
>>> ---
>>>    arch/arm64/boot/dts/qcom/pm8916.dtsi | 48 ++++++++++++++++++++++++++++++++++++
>>>    1 file changed, 48 insertions(+)
>>>
>>> diff --git a/arch/arm64/boot/dts/qcom/pm8916.dtsi b/arch/arm64/boot/dts/qcom/pm8916.dtsi
>>> index f4de86787743..4b2e8fb47d2d 100644
>>> --- a/arch/arm64/boot/dts/qcom/pm8916.dtsi
>>> +++ b/arch/arm64/boot/dts/qcom/pm8916.dtsi
>>> @@ -41,6 +41,35 @@ watchdog {
>>>    			};
>>>    		};
>>>    +		pm8916_charger: charger@...0 {
>>> +			compatible = "qcom,pm8916-lbc";
>>> +			reg = <0x1000>, <0x1200>, <0x1300>, <0x1600>;
>>> +			reg-names = "chgr", "bat_if", "usb", "misc";
>>> +
>>> +			interrupts = <0x0 0x10 0 IRQ_TYPE_EDGE_BOTH>,
>>> +				     <0x0 0x10 5 IRQ_TYPE_EDGE_BOTH>,
>>> +				     <0x0 0x10 6 IRQ_TYPE_EDGE_BOTH>,
>>> +				     <0x0 0x10 7 IRQ_TYPE_EDGE_BOTH>,
>>> +				     <0x0 0x12 0 IRQ_TYPE_EDGE_BOTH>,
>>> +				     <0x0 0x12 1 IRQ_TYPE_EDGE_BOTH>,
>>> +				     <0x0 0x13 0 IRQ_TYPE_EDGE_BOTH>,
>>> +				     <0x0 0x13 1 IRQ_TYPE_EDGE_BOTH>,
>>> +				     <0x0 0x13 2 IRQ_TYPE_EDGE_BOTH>,
>>> +				     <0x0 0x13 4 IRQ_TYPE_EDGE_BOTH>;
>>> +			interrupt-names = "vbat_det",
>>> +					  "fast_chg",
>>> +					  "chg_fail",
>>> +					  "chg_done",
>>> +					  "bat_pres",
>>> +					  "temp_ok",
>>> +					  "coarse_det",
>>> +					  "usb_vbus",
>> So, both the charger and the USBIN driver use the same irq? :/
>>
> 
> AFAIU the usbin extcon driver pretty much just tracks the state
> of the IRQ to report extcon. It happens to assume the same part
> of the pmic though, yes, which also means there will be no user
> that would enable both charger and vbus extcon, since charger
> driver provides this functionality as well.
So, should USBIN be removed from PM8916 dt since it's essentially
a part of the charger block?

Konrad