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authorLinus Walleij <linus.walleij@linaro.org>2021-08-05 11:58:28 +0300
committerSebastian Reichel <sre@kernel.org>2021-08-14 13:48:07 +0300
commit4eef766b7d4d88f0b984781bc1bcb574a6eafdc7 (patch)
tree4dfad7de8464c839bbfe46c365b4afd6be9d471b /drivers/power
parentb171cb623ca253856b7bf7345e8761a7f24b54b9 (diff)
downloadlinux-4eef766b7d4d88f0b984781bc1bcb574a6eafdc7.tar.xz
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 <linus.walleij@linaro.org> Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Diffstat (limited to 'drivers/power')
-rw-r--r--drivers/power/supply/power_supply_core.c20
1 files changed, 20 insertions, 0 deletions
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",