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Use the generic ti,bq27xxx compatible >> so the driver can select the register map from DeviceType at probe >> time. >> >> Tested on OnePlus 6T (fajita) with a bq27541 (DeviceType 0x0541): >> after booting the new kernel, the battery reported 4.360 V, 100% state >> of charge, 27.8 C, and Full status. >> >> Fixes: 12dfb002ca01 ("arm64: dts: qcom: sdm845-oneplus-*: add fuel gauge") > > What is the bug here? Your commit msg should be specific about it. > Commit msg seems pretty clear about the bug (to me at least), the DT says the fuel gauge is a BQ27411 but that isn't the case, some shipped with a BQ27541 fuel gauge. (I do agree though this shouldn't have a fixes tag as back-porting this without also back-porting the driver-side change would break users) Since these fuel gauges often live on the battery pack and not the device itself, folks changing their batteries might end up with different fuel gauges, so having some detection method is going to be helpful. Rinat, I'm not familiar with the bootflow on these devices, but is this something you could detect in the bootloader and fixup the DT before it is passed to kernel? That way the kernel gets a DT with the correct and specific compatible to start with? Andrew >> >> Signed-off-by: Rinat Muhamedgaliev >> --- >> arch/arm64/boot/dts/qcom/sdm845-oneplus-common.dtsi | 4 ++-- >> arch/arm64/boot/dts/qcom/sdm845-oneplus-enchilada.dts | 2 +- >> arch/arm64/boot/dts/qcom/sdm845-oneplus-fajita.dts | 2 +- >> 3 files changed, 4 insertions(+), 4 deletions(-) >> >> diff --git a/arch/arm64/boot/dts/qcom/sdm845-oneplus-common.dtsi b/arch/arm64/boot/dts/qcom/sdm845-oneplus-common.dtsi >> index 948a0dd..8c5cd94 100644 >> --- a/arch/arm64/boot/dts/qcom/sdm845-oneplus-common.dtsi >> +++ b/arch/arm64/boot/dts/qcom/sdm845-oneplus-common.dtsi >> @@ -790,8 +790,8 @@ &i2c10 { >> status = "okay"; >> clock-frequency = <100000>; >> >> - bq27441_fg: bq27441-battery@55 { >> - compatible = "ti,bq27411"; >> + bq27xxx_fg: fuel-gauge@55 { >> + compatible = "ti,bq27xxx"; > > And this is just breaking all users without any explanation. > > > >> status = "okay"; >> reg = <0x55>; >> }; >> diff --git a/arch/arm64/boot/dts/qcom/sdm845-oneplus-enchilada.dts b/arch/arm64/boot/dts/qcom/sdm845-oneplus-enchilada.dts >> index 5f01115..cf40842 100644 >> --- a/arch/arm64/boot/dts/qcom/sdm845-oneplus-enchilada.dts >> +++ b/arch/arm64/boot/dts/qcom/sdm845-oneplus-enchilada.dts >> @@ -44,7 +44,7 @@ main_cam_ois: main-cam-ois-regulator { >> }; >> }; >> >> -&bq27441_fg { >> +&bq27xxx_fg { > > No, irrelevant to the supposed bug here. > > Best regards, > Krzysztof >