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

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Date:   Sun,  9 Jul 2023 22:07:08 -0700
From:   Bjorn Andersson <andersson@...nel.org>
To:     Andy Gross <agross@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Jakob Hauser <jahau@...ketmail.com>
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 Mon, 19 Jun 2023 22:37:43 +0200, 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].
> 
> [...]

Applied, thanks!

[1/1] arm64: dts: qcom: msm8916-samsung-serranove: Add RT5033 PMIC with charger
      commit: 404d7f65767dde3a0eb3d6127b458b61ed7d7118

Best regards,
-- 
Bjorn Andersson <andersson@...nel.org>