The Google Pixel 6 has a Maxim MAX77759 which provides a fuel gauge with an interface with a lot in common with the Maxim max1720x. Modify the Maxim MAX1720x driver to be compatible with the Maxim MAX77759 and enable it for the gs101-oriole board. The voltage, current, capacity, temperature and charge have all been tested and show coherent results. The charge full design and capacity equal the ones seen on android, the ratio between average charge and average current does predict pretty accurately the time to empty under a constant workload and temperature is coherent with the dynamic state of the device. Health is not enabled as it always reports overheating. The time to empty is wrong by about a factor 2 and is thus also disabled. Signed-off-by: Thomas Antoine <t.antoine@xxxxxxxxxxxx> --- Changes in v3: - Update base tree to avoid conflicts - Fix capacity computation for max1720x - Add separate properties for the max7759 to disable non-functional ones - Take TASKPERIOD into account for voltage computation of max77759 - Simplify vcell computation (Dimitri Fedrau) - Switch has_nvmem to bool and keep it only in chip_data (Dimitri Fedrau) - Drop the yes_range from the write table (Sebastian Reichel) - Add test_power_supply_properties.sh to cover letter (Sebastian Reichel) - Switch back some changes to binding and actually use allOf:if: to restrict constraints (Krzysztof Kozlowski) - Fix style errors - Link to v2: https://lore.kernel.org/r/20250102-b4-gs101_max77759_fg-v2-0-87959abeb7ff@xxxxxxxxxxxx Changes in v2: - Add fallback for voltage measurement (André Draszik) - Add regmap for the max77759 (André Draszik) - Add chip identification for the max77759 (André Draszik, Peter Griffin) - Move RSense value to a devicetree property shunt-resistor-micro-ohms (Dimitri Fedrau, André Draszik) - Use allOf:if to narrow binding per variant (Krzysztof Kozlowski) - Remove binding example (Krzysztof Kozlowski) - Change defconfig order to follow savedefconfig (Krzysztof Kozlowski) - Fix style errors - Link to v1: https://lore.kernel.org/r/20241202-b4-gs101_max77759_fg-v1-0-98d2fa7bfe30@xxxxxxxxxxxx tools/testing/selftests/power_supply/test_power_supply_properties.sh: ok 1 max77759-fg.exists ok 2 max77759-fg.uevent.NAME ok 3 max77759-fg.sysfs.type ok 4 max77759-fg.uevent.TYPE ok 5 max77759-fg.sysfs.usb_type # SKIP ok 6 max77759-fg.sysfs.online # SKIP ok 7 max77759-fg.sysfs.present ok 8 max77759-fg.sysfs.status # SKIP ok 9 max77759-fg.sysfs.capacity ok 10 max77759-fg.sysfs.capacity_level # SKIP ok 11 max77759-fg.sysfs.model_name ok 12 max77759-fg.sysfs.manufacturer ok 13 max77759-fg.sysfs.serial_number # SKIP ok 14 max77759-fg.sysfs.technology # SKIP ok 15 max77759-fg.sysfs.cycle_count # SKIP ok 16 max77759-fg.sysfs.scope # SKIP ok 17 max77759-fg.sysfs.input_current_limit # SKIP(Dimitri Fedrau) ok 18 max77759-fg.sysfs.input_voltage_limit # SKIP ok 19 max77759-fg.sysfs.voltage_now ok 20 max77759-fg.sysfs.voltage_min # SKIP ok 21 max77759-fg.sysfs.voltage_max # SKIP ok 22 max77759-fg.sysfs.voltage_min_design # SKIP ok 23 max77759-fg.sysfs.voltage_max_design # SKIP ok 24 max77759-fg.sysfs.current_now ok 25 max77759-fg.sysfs.current_max # SKIP ok 26 max77759-fg.sysfs.charge_now # SKIP ok 27 max77759-fg.sysfs.charge_full ok 28 max77759-fg.sysfs.charge_full_design ok 29 max77759-fg.sysfs.power_now # SKIP ok 30 max77759-fg.sysfs.energy_now # SKIP ok 31 max77759-fg.sysfs.energy_full # SKIP ok 32 max77759-fg.sysfs.energy_full_design # SKIP ok 33 max77759-fg.sysfs.energy_full_design # SKIP --- Thomas Antoine (5): power: supply: correct capacity computation power: supply: add support for max77759 fuel gauge dt-bindings: power: supply: add max77759-fg flavor arm64: defconfig: enable Maxim max1720x driver arm64: dts: exynos: gs101-oriole: enable Maxim max77759 fuel gauge .../bindings/power/supply/maxim,max17201.yaml | 34 ++- .../boot/dts/exynos/google/gs101-pixel-common.dtsi | 10 + arch/arm64/configs/defconfig | 1 + drivers/power/supply/max1720x_battery.c | 271 ++++++++++++++++++--- 4 files changed, 280 insertions(+), 36 deletions(-) --- base-commit: e48e99b6edf41c69c5528aa7ffb2daf3c59ee105 change-id: 20241202-b4-gs101_max77759_fg-402e231a4b33 Best regards, -- Thomas Antoine <t.antoine@xxxxxxxxxxxx>
