Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 57 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/power/supply/battery.txt b/Documentation/devicetree/bindings/power/supply/battery.txt
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+Battery Characteristics
+
+The devicetree battery node provides static battery characteristics.
+In smart batteries, these are typically stored in non-volatile memory
+on a fuel gauge chip. The battery node should be used where there is
+no appropriate non-volatile memory, or it is unprogrammed/incorrect.
+
+Upstream dts files should not include battery nodes, unless the battery
+represented cannot easily be replaced in the system by one of a
+different type. This prevents unpredictable, potentially harmful,
+behavior should a replacement that changes the battery type occur
+without a corresponding update to the dtb.
+
+Required Properties:
+ - compatible: Must be "simple-battery"
+
+Optional Properties:
+ - voltage-min-design-microvolt: drained battery voltage
+ - energy-full-design-microwatt-hours: battery design energy
+ - charge-full-design-microamp-hours: battery design capacity
+ - precharge-current-microamp: current for pre-charge phase
+ - 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
+
+Battery properties are named, where possible, for the corresponding
+elements in enum power_supply_property, defined in
+https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/include/linux/power_supply.h
+
+Batteries must be referenced by chargers and/or fuel-gauges
+using a phandle. The phandle's property should be named
+"monitored-battery".
+
+Example:
+
+	bat: battery {
+		compatible = "simple-battery";
+		voltage-min-design-microvolt = <3200000>;
+		energy-full-design-microwatt-hours = <5290000>;
+		charge-full-design-microamp-hours = <1430000>;
+		precharge-current-microamp = <256000>;
+		charge-term-current-microamp = <128000>;
+		constant-charge-current-max-microamp = <900000>;
+		constant-charge-voltage-max-microvolt = <4200000>;
+	};
+
+	charger: charger@11 {
+		....
+		monitored-battery = <&bat>;
+		...
+	};
+
+	fuel_gauge: fuel-gauge@22 {
+		....
+		monitored-battery = <&bat>;
+		...
+	};