[PATCH v2 00/20] power-suppy/i2c/extcon: Fix charger setup on Xiaomi Mi Pad 2 and Lenovo Yogabook

Hans de Goede
2021-11-14T17:03:58Z

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.

This series takes care of making sure that charging and device/host mode
switching also works on the Xiaomi Mi Pad 2 and the Lenovo Yogabook.

New in version 2 of this patch-set:
- This is all about Whiskey Cove based designs, instead of going roundabout
and (ab)using drivers/platform/x86/touchscreen_dmi.c to add
device-properties on the WC I2C-dev and then check for that, just add a new
intel_cht_wc_get_model() helper to the intel_soc_pmic_chtwc.c MFD-driver.
- Extend the series to not only fix things on the Mi Pad 2, but also on the
Lenovo Yogabook YB1-X90*/-X91* models.

Patches 1-13: Prepare the bq25890 power_supply driver to fully support
the Mi Pad 2 and the Yogabook
Note this includes a new version of the 3 bq25890 cleanup /
fixes patches send earlier by Yauhen Kharuzhy
Patch 14: Adds the intel_cht_wc_get_model() helper
Patch 15: Uses this intel_cht_wc_get_model() value to instantiate an
i2c-client with the right type and properties for the charger
IC used on the board (instead of harcoding the GPD values)
Patches 16-20: Modify the extcon code to provide charger-detection results
to the charger driver and to take care of the Vbus boost
regulator control (for host-mode) and device/host mode
switching

I've tried to keep the power_supply patches as generic as possible while
focussing some of the special handling these boards need in the
WC PMIC MFD and cell drivers, which will only get loaded on these boards.

Since some of the later patches depend on some of the power_supply changes;
and since the Whiskey Cove MFD and cell drivers generally do not see much
changes I believe that it would be best to merge the entire series through
Sebastian's linux-power-supply tree.

Lee, Wolfram and Chanwoo, may we please have your Ack for merging this
entire series through Sebastian's linux-power-supply tree?

Regards,

Hans

Hans de Goede (16):
power: supply: core: Refactor
power_supply_set_input_current_limit_from_supplier()
power: supply: bq25890: Add a bq25890_rw_init_data() helper
power: supply: bq25890: Add support to skip reset at probe() /
remove()
power: supply: bq25890: Add support to read back the settings from the
chip
power: supply: bq25890: Enable charging on boards where we skip reset
power: supply: bq25890: Drop dev->platform_data == NULL check
power: supply: bq25890: Add bq25890_set_otg_cfg() helper
power: supply: bq25890: Add support for registering the Vbus boost
converter as a regulator
power: supply: bq25890: On the bq25892 set the IINLIM based on
external charger detection
mfd: intel_soc_pmic_chtwc: Add intel_cht_wc_get_model() helper
function
i2c: cht-wc: Make charger i2c-client instantiation board/device-model
specific
extcon: intel-cht-wc: Use new intel_cht_wc_get_model() helper
extcon: intel-cht-wc: Support devs with Micro-B / USB-2 only Type-C
connectors
extcon: intel-cht-wc: Refactor cht_wc_extcon_get_charger()
extcon: intel-cht-wc: Add support for registering a power_supply
class-device
extcon: intel-cht-wc: Report RID_A for ACA adapters

Yauhen Kharuzhy (4):
power: supply: bq25890: Fix ADC continuous conversion setting when
charging
power: supply: bq25890: Rename IILIM field to IINLIM
power: supply: bq25890: Reduce reported CONSTANT_CHARGE_CURRENT_MAX
for low temperatures
power: supply: bq25890: Support higher charging voltages through Pump
Express+ protocol

drivers/extcon/Kconfig | 3 +-
drivers/extcon/extcon-intel-cht-wc.c | 242 +++++++++++++--
drivers/i2c/busses/i2c-cht-wc.c | 120 ++++++--
drivers/mfd/intel_soc_pmic_chtwc.c | 46 +++
drivers/power/supply/bq24190_charger.c | 10 +-
drivers/power/supply/bq25890_charger.c | 374 +++++++++++++++++++----
drivers/power/supply/power_supply_core.c | 57 ++--
include/linux/mfd/intel_soc_pmic.h | 9 +
include/linux/power/bq25890_charger.h | 15 +
include/linux/power_supply.h | 5 +-
10 files changed, 744 insertions(+), 137 deletions(-)
create mode 100644 include/linux/power/bq25890_charger.h

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2.31.1