Introduce one property to present the battery internal resistance for battery
information.
Signed-off-by: Baolin Wang <baolin.w...@linaro.org>
---
Changes from v1:
- New patch in v2.
---
.../devicetree/bindings/power/supply/battery.txt | 2 ++
drivers/power/supply/power_supply_core.c | 3 +++
include/linux/power_supply.h | 1 +
3 files changed, 6 insertions(+)
diff --git a/Documentation/devicetree/bindings/power/supply/battery.txt
b/Documentation/devicetree/bindings/power/supply/battery.txt
index f4d3b4a..25b9d2e 100644
--- a/Documentation/devicetree/bindings/power/supply/battery.txt
+++ b/Documentation/devicetree/bindings/power/supply/battery.txt
@@ -22,6 +22,7 @@ Optional Properties:
- charge-term-current-microamp: current for charge termination phase
- constant-charge-current-max-microamp: maximum constant input current
- constant-charge-voltage-max-microvolt: maximum constant input voltage
+ - internal-resistance-micro-ohms: battery internal resistance
Battery properties are named, where possible, for the corresponding
elements in enum power_supply_property, defined in
@@ -42,6 +43,7 @@ Example:
charge-term-current-microamp = <128000>;
constant-charge-current-max-microamp = <900000>;
constant-charge-voltage-max-microvolt = <4200000>;
+ internal-resistance-micro-ohms = <250000>;
};
charger: charger@11 {
diff --git a/drivers/power/supply/power_supply_core.c
b/drivers/power/supply/power_supply_core.c
index e853618..9f3452f 100644
--- a/drivers/power/supply/power_supply_core.c
+++ b/drivers/power/supply/power_supply_core.c
@@ -579,6 +579,7 @@ int power_supply_get_battery_info(struct power_supply *psy,
info->charge_term_current_ua = -EINVAL;
info->constant_charge_current_max_ua = -EINVAL;
info->constant_charge_voltage_max_uv = -EINVAL;
+ info->internal_resistance_uohm = -EINVAL;
if (!psy->of_node) {
dev_warn(&psy->dev, "%s currently only supports devicetree\n",
@@ -616,6 +617,8 @@ int power_supply_get_battery_info(struct power_supply *psy,
&info->constant_charge_current_max_ua);
of_property_read_u32(battery_np,
"constant_charge_voltage_max_microvolt",
&info->constant_charge_voltage_max_uv);
+ of_property_read_u32(battery_np, "internal-resistance-micro-ohms",
+ &info->internal_resistance_uohm);
return 0;
}
diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h
index f807691..019452d 100644
--- a/include/linux/power_supply.h
+++ b/include/linux/power_supply.h
@@ -326,6 +326,7 @@ struct power_supply_battery_info {
int charge_term_current_ua; /* microAmps */
int constant_charge_current_max_ua; /* microAmps */
int constant_charge_voltage_max_uv; /* microVolts */
+ int internal_resistance_uohm; /* microOhms */
};
extern struct atomic_notifier_head power_supply_notifier;
--
1.7.9.5
