Does ln8000 control battery temperature, and stops charge on overheat

[catmengi]

Does ln8000 control battery temperature on charging, and can it low power or stop charging on battery overheat?

[map220v]

Ln8000 can monitor battery temperature, but it's disabled in xiaomi's device tree and here too.

[catmengi]

Does when my battery overheat it will not low power or stop charging? Or pm8150b_thermal should disable charging/low power? Or it it just keep overheating or shutdown tablet? What it will do

[catmengi]

If you can please explain me what this line in pm8150b_fg should mean: //power-supplies = <&ln8000_charger>;

[map220v]

Does when my battery overheat it will not low power or stop charging? Or pm8150b_thermal should disable charging/low power? Or it it just keep overheating or shutdown tablet? What it will do

Idk if it will or will not disable charging, nabu batteries shouldn't overheat that much for that to become necessary.

If you can please explain me what this line in pm8150b_fg should mean: //power-supplies = <&ln8000_charger>;

It's required for pm8150b fuelgauge driver to properly display charging status, also it's actually should be "power-supplies = <&pm8150b_charger>", because only pm8150b charger can properly trigger interrupt and tell that charging is started, ln8000 is unreliable for charging state detection, because it doesn't trigger it's interrupt in most cases when it detects power on vbus(in xiaomi's kernel it's even has wrong interrupt in device tree, so ln8000 interrupt code never gets called)

[catmengi]

Does charging starts by pm8150b_charger then by ln8000? If i change power-supplies = <&ln8000_charger>; to power-supplies = <&pm8150b_charger>; will it display charging status? Or it already display it normaly.

[map220v]

When you connect charger pm8150b reacts to vbus power and starts regular charging, it doesn't need driver to do this. Ln8000 that is used for fast charging doesn't enable charging automatically, and it requires driver that will enable charging based on fuelgauge charging status.

Without "power-supplies" fuelgauge driver in this kernel will instead try to detect charging status by checking batteries current.

[catmengi]

When you connect charger pm8150b reacts to vbus power and starts regular charging, it doesn't need driver to do this. Ln8000 that is used for fast charging doesn't enable charging automatically, and it requires driver that will enable charging based on fuelgauge charging status.

Without "power-supplies" fuelgauge driver in this kernel will instead try to detect charging status by checking batteries current.

Does pm8150b disables after start of ln8000? Or it stil detect charging status when ln8000 is charging batteries?

[map220v]

pm8150b always works when device powered on, and it will always detect charging status even when device is powered off or doesn't have any power.

[catmengi]

And the last question about charging, i saw in dts that usb typec have power and data roles as dual, can i charge my table and use it usb host at the same time(of course in linux)

[map220v]

Yes, you can change for example data-role to host and power-role to sink, refer to this bindings documentation https://www.kernel.org/doc/Documentation/devicetree/bindings/connector/usb-connector.yaml

[catmengi]

Yes, you can change for example data-role to host and power-role to sink, refer to this bindings documentation https://www.kernel.org/doc/Documentation/devicetree/bindings/connector/usb-connector.yaml

Is this done automatically? Or i need to do this manualy, by writing to /sys/class/typec/port*

[map220v]

It is automatic when dual role is set, it will use power role sink if you connect charger or source if you connect usb device to tablet that requires power.