From: Linus Walleij Date: Thu, 5 Aug 2021 08:58:28 +0000 (+0200) Subject: power: supply: core: Parse battery chemistry/technology X-Git-Tag: Ubuntu-5.15.0-12.12~2012^2~14 X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=4eef766b7d4d88f0b984781bc1bcb574a6eafdc7;p=mirror_ubuntu-jammy-kernel.git power: supply: core: Parse battery chemistry/technology This extends the struct power_supply_battery_info with a "technology" field makes the core DT parser optionally obtain this from the device tree. Signed-off-by: Linus Walleij Signed-off-by: Sebastian Reichel --- diff --git a/drivers/power/supply/power_supply_core.c b/drivers/power/supply/power_supply_core.c index d99e2f11c183..dd62c871b2b5 100644 --- a/drivers/power/supply/power_supply_core.c +++ b/drivers/power/supply/power_supply_core.c @@ -571,6 +571,7 @@ int power_supply_get_battery_info(struct power_supply *psy, int err, len, index; const __be32 *list; + info->technology = POWER_SUPPLY_TECHNOLOGY_UNKNOWN; info->energy_full_design_uwh = -EINVAL; info->charge_full_design_uah = -EINVAL; info->voltage_min_design_uv = -EINVAL; @@ -618,6 +619,25 @@ int power_supply_get_battery_info(struct power_supply *psy, * Documentation/power/power_supply_class.rst. */ + err = of_property_read_string(battery_np, "device-chemistry", &value); + if (!err) { + if (!strcmp("nickel-cadmium", value)) + info->technology = POWER_SUPPLY_TECHNOLOGY_NiCd; + else if (!strcmp("nickel-metal-hydride", value)) + info->technology = POWER_SUPPLY_TECHNOLOGY_NiMH; + else if (!strcmp("lithium-ion", value)) + /* Imprecise lithium-ion type */ + info->technology = POWER_SUPPLY_TECHNOLOGY_LION; + else if (!strcmp("lithium-ion-polymer", value)) + info->technology = POWER_SUPPLY_TECHNOLOGY_LIPO; + else if (!strcmp("lithium-ion-iron-phosphate", value)) + info->technology = POWER_SUPPLY_TECHNOLOGY_LiFe; + else if (!strcmp("lithium-ion-manganese-oxide", value)) + info->technology = POWER_SUPPLY_TECHNOLOGY_LiMn; + else + dev_warn(&psy->dev, "%s unknown battery type\n", value); + } + of_property_read_u32(battery_np, "energy-full-design-microwatt-hours", &info->energy_full_design_uwh); of_property_read_u32(battery_np, "charge-full-design-microamp-hours", diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h index be203985ecdd..9ca1f120a211 100644 --- a/include/linux/power_supply.h +++ b/include/linux/power_supply.h @@ -352,6 +352,7 @@ struct power_supply_resistance_temp_table { */ struct power_supply_battery_info { + unsigned int technology; /* from the enum above */ int energy_full_design_uwh; /* microWatt-hours */ int charge_full_design_uah; /* microAmp-hours */ int voltage_min_design_uv; /* microVolts */