Messages in this thread | | | From | Thomas Weißschuh <> | Subject | [PATCH 0/4] power: supply: add charge_behaviour property (force-discharge, inhibit-charge) | Date | Wed, 24 Nov 2021 00:27:00 +0100 |
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Hi,
this series adds support for the charge_behaviour property to the power subsystem and thinkpad_acpi driver.
As thinkpad_acpi has to use the 'struct power_supply' created by the generic ACPI driver it has to rely on custom sysfs attributes instead of proper power_supply properties to implement this property.
Patch 1: Adds the power_supply documentation and basic public API Patch 2: Adds helpers to power_supply core to help drivers implement the charge_behaviour attribute Patch 3: Adds support for force-discharge to thinkpad_acpi. Patch 4: Adds support for inhibit-discharge to thinkpad_acpi.
Patch 3 and 4 are largely taken from other patches and adapted to the new API. (Links are in the patch trailer)
Ognjen Galic:
Your S-o-b is on the original inhibit_charge and force_discharge patches. I would like to add you as Co-developed-by but to do that it will also require your S-o-b. Could you give your sign-offs for the new patches, so you can be properly attributed?
Sebastian Reichel:
Currently the series does not actually support the property as a proper powersupply property handled fully by power_supply_sysfs.c because there would be no user for this property.
Previous discussions about the API:
https://lore.kernel.org/platform-driver-x86/20211108192852.357473-1-linux@weissschuh.net/ https://lore.kernel.org/platform-driver-x86/21569a89-8303-8573-05fb-c2fec29983d1@gmail.com/
v1: https://lore.kernel.org/lkml/20211113104225.141333-1-linux@weissschuh.net/ v1 -> v2:
* Use sysfs_emit-APIs instead of plain sprintf * More cecks for actual feature availability * Validation of the written values * Read inhibit-charge via BICG instead of PSSG (peak shift state) * Don't mangle error numbers in charge_behaviour_store()
Open points:
Thomas Koch has observed that on a T450s with two batteries inhibit-charge on BAT0 will affect both batteries and for BAT1 it is ignored entirely, this seems to be a bug in the EC. On my T460s with two batteries it works correctly.
Thomas Weißschuh (4): power: supply: add charge_behaviour attributes power: supply: add helpers for charge_behaviour sysfs platform/x86: thinkpad_acpi: support force-discharge platform/x86: thinkpad_acpi: support inhibit-charge
Documentation/ABI/testing/sysfs-class-power | 14 ++ drivers/platform/x86/thinkpad_acpi.c | 191 +++++++++++++++++++- drivers/power/supply/power_supply_sysfs.c | 51 ++++++ include/linux/power_supply.h | 16 ++ 4 files changed, 268 insertions(+), 4 deletions(-)
base-commit: 66f4beaa6c1d28161f534471484b2daa2de1dce0 -- 2.34.0
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