On Sun, Nov 14, 2021 at 7:03 PM Hans de Goede <hdegoede@xxxxxxxxxx> wrote: > > Hi All, > > This is version 2 of my series previously titled: > "[PATCH 00/13] power-suppy/i2c/extcon: Add support for cht-wc PMIC > without USB-PD support". > > So far almost all the kernel code surrounding the Cherry Trail Whiskey Cove > PMIC has been developed on the GPD win / pocket devices and it has various > assumption based on that. In the mean time I've learned (and gotten access > to) about 2 more designs and none of the 3 now known designs use a single > standard setup for the charger, fuel-gauge and other chips surrounding the > PMIC / charging+data USB port: > > 1. The GPD Win and GPD Pocket mini-laptops, these are really 2 models > but the Pocket re-uses the GPD Win's design in a different housing: > > The WC PMIC is connected to a TI BQ24292i charger, paired with > a Maxim MAX17047 fuelgauge + a FUSB302 USB Type-C Controller + > a PI3USB30532 USB switch, for a fully functional Type-C port. > > 2. The Xiaomi Mi Pad 2: > > The WC PMIC is connected to a TI BQ25890 charger, paired with > a TI BQ27520 fuelgauge, using the TI BQ25890 for BC1.2 charger type > detection, for a USB-2 only Type-C port without PD. > > 3. The Lenovo Yoga Book YB1-X90 / Lenovo Yoga Book YB1-X91 series: > > The WC PMIC is connected to a TI BQ25892 charger, paired with > a TI BQ27542 fuelgauge, using the WC PMIC for BC1.2 charger type > detection and using the BQ25892's Mediatek Pump Express+ (1.0) > > ### > > Unlike what is normal on X86 this diversity in designs is not handled / > abstracted away by the ACPI tables. I will briefly look into it, right now two observations (or nit-picks): - you may utilize Co-developed-by tag when it makes sense - I would rather see "x86/ACPI" in all texts (note small "x") -- With Best Regards, Andy Shevchenko
