dt-bindings: power: Introduce one property to describe the battery resistance with...

Since the battery internal resistance can be changed as the temperature
changes, thus add one table to describe the battery resistance percent
in different temperatures to get a accurate battery internal resistance.

Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Baolin Wang <baolin.wang7@gmail.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>

diff --git a/Documentation/devicetree/bindings/power/supply/battery.txt b/Documentation/devicetree/bindings/power/supply/battery.txt
index 5c913d4..3049cf8 100644 (file)
--- a/Documentation/devicetree/bindings/power/supply/battery.txt
+++ b/Documentation/devicetree/bindings/power/supply/battery.txt
@@ -35,6 +35,10 @@ Optional Properties:
    for each of the battery capacity lookup table. The first temperature value
    specifies the OCV table 0, and the second temperature value specifies the
    OCV table 1, and so on.
+ - resistance-temp-table: An array providing the temperature in degree Celsius
+   and corresponding battery internal resistance percent, which is used to look
+   up the resistance percent according to current temperature to get a accurate
+   batterty internal resistance in different temperatures.
 
 Battery properties are named, where possible, for the corresponding
 elements in enum power_supply_property, defined in
@@ -61,6 +65,7 @@ Example:
                ocv-capacity-table-0 = <4185000 100>, <4113000 95>, <4066000 90>, ...;
                ocv-capacity-table-1 = <4200000 100>, <4185000 95>, <4113000 90>, ...;
                ocv-capacity-table-2 = <4250000 100>, <4200000 95>, <4185000 90>, ...;
+               resistance-temp-table = <20 100>, <10 90>, <0 80>, <(-10) 60>;
        };
 
        charger: charger@11 {