linux-kernel - Re: [PATCH v2] arm64: dts: qcom: msm8916-samsung-serranove: Add RT5033 PMIC with charger

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Date:   Tue, 11 Jul 2023 08:13:55 +0200
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Jakob Hauser <jahau@...ketmail.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>
Cc:     Sebastian Reichel <sre@...nel.org>, Lee Jones <lee@...nel.org>,
        Stephan Gerhold <stephan@...hold.net>,
        Raymond Hackley <raymondhackley@...tonmail.com>,
        Henrik Grimler <henrik@...mler.se>,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        phone-devel@...r.kernel.org, ~postmarketos/upstreaming@...ts.sr.ht
Subject: Re: [PATCH v2] arm64: dts: qcom: msm8916-samsung-serranove: Add
 RT5033 PMIC with charger

On 19/06/2023 22:37, Jakob Hauser wrote:
> For the regulators, apply the same settings as in the downstream
> devicetree [1], including the "regulator-always-on" for the SAFE_LDO.
> For the voltage of SAFE_LDO, however, there is only one voltage of 4.9 V
> available in the mainline driver [2][3].
> 
> The values of the battery data evolve from following sources:
> - precharge current: 450 mA corresponds to the default value of the chip. It
>   doesn't get changed by the downstream Android driver. Therefore let's stick
>   to this value.
> - constant charge current: The 1000 mA are taken from the downstream devicetree
>   of the serranove battery. It's not easy to spot. The value is in the line
>   "input_current_limit" [4]. The rows are according to the power supply type,
>   the 4th value stands for "main supply" [5]. That's the value used by the
>   Android driver when a charging cable is plugged into the device.
> - charge termination current: In the downstream devicetree of the battery
>   that's the line "full_check_current_1st", which contains the 150 mA [6].
> - precharge voltage: This one doesn't get set in the downstream Android driver.
>   The chip's default is 2.8 V. That seemed too low to have a notable effect of
>   handling the battery gentle. The chosen value of 3.5 V is a bit arbitrary
>   and possibly rather high. As the device is already several years old and
>   therefore most batteries too, a value on the safe side seems reasonable.
> - constant charge voltage: The value of 4.35 V is set in the line
>   "chg_float_voltage" of the downstream battery devicetree [7].
> 
> The "connector" sub-node in the extcon node, the "battery" node in the
> general section and the line "power-supplies" in the fuel-gauge node result
> from the way of implementation documented in the dt-bindings of
> rt5033-charger [8] and mfd rt5033 [9].
> 
> [1] https://github.com/msm8916-mainline/linux-downstream/blob/GT-I9195I/arch/arm/boot/dts/samsung/msm8916/msm8916-sec-serranovelte-eur-r03.dtsi#L135-L181
> [2] https://github.com/torvalds/linux/blob/v6.3/include/linux/mfd/rt5033-private.h#L211-L212
> [3] https://github.com/torvalds/linux/blob/v6.3/drivers/regulator/rt5033-regulator.c#L83
> [4] https://github.com/msm8916-mainline/linux-downstream/blob/GT-I9195I/arch/arm/boot/dts/samsung/msm8916/msm8916-sec-serranovelte-battery-r01.dtsi#L100
> [5] https://github.com/msm8916-mainline/linux-downstream/blob/GT-I9195I/include/linux/power_supply.h#L173-L177
> [6] https://github.com/msm8916-mainline/linux-downstream/blob/GT-I9195I/arch/arm/boot/dts/samsung/msm8916/msm8916-sec-serranovelte-battery-r01.dtsi#L102
> [7] https://github.com/msm8916-mainline/linux-downstream/blob/GT-I9195I/arch/arm/boot/dts/samsung/msm8916/msm8916-sec-serranovelte-battery-r01.dtsi#L95
> [8] https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/tree/Documentation/devicetree/bindings/power/supply/richtek,rt5033-charger.yaml?h=next-20230616
> [9] https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/tree/Documentation/devicetree/bindings/mfd/richtek,rt5033.yaml?h=next-20230616
> 
> Signed-off-by: Jakob Hauser <jahau@...ketmail.com>
> ---
> The patch is based on linux-next "next-20230616".
> 
> The driver rt5033-charger was just recently added to linux-next.

This appeared in today's next next-20230711 and causes new warnings

msm8916-samsung-serranove.dtb: extcon@14: 'connector' does not match any
of the regexes: 'pinctrl-[0-9]+'
https://krzk.eu/#/builders/90/builds/40/steps/17/logs/stdio

The commit mentions rt5033, but that is not the schema being here
tested, so clearly this is wrong or bindings were not updated.

Please fix (and test your future patches).

Best regards,
Krzysztof