| Message ID | 44f0c19510c7317cb4ee6cac54b3adfa81c2d6d0.1572245011.git.baolin.wang@linaro.org |
|---|---|
| State | New |
| Headers | show |
| Series | Improve the SC27XX fuel gauge controller | expand |
On Mon, Oct 28, 2019 at 03:18:57PM +0800, Baolin Wang wrote: > Since the battery internal resistance can be changed as the temperature > changes, thus add one table to describe the battery resistance percent > in different temperature to get a accurate battery internal resistance. > > Signed-off-by: Baolin Wang <baolin.wang@linaro.org> > --- > .../devicetree/bindings/power/supply/battery.txt | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/Documentation/devicetree/bindings/power/supply/battery.txt b/Documentation/devicetree/bindings/power/supply/battery.txt > index 5c913d4c..1a6f951 100644 > --- 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 resistance percent and > + corresponding temperature in degree Celsius, which is used to look up the > + resistance percent according to current temperature to get a accurate > + batterty internal resistance. What's the order of values? The description and example don't seem to agree unless negative percent is a thing. > > 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 { > -- > 1.7.9.5 >
diff --git a/Documentation/devicetree/bindings/power/supply/battery.txt b/Documentation/devicetree/bindings/power/supply/battery.txt index 5c913d4c..1a6f951 100644 --- 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 resistance percent and + corresponding temperature in degree Celsius, which is used to look up the + resistance percent according to current temperature to get a accurate + batterty internal resistance. 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 {
Since the battery internal resistance can be changed as the temperature changes, thus add one table to describe the battery resistance percent in different temperature to get a accurate battery internal resistance. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> --- .../devicetree/bindings/power/supply/battery.txt | 5 +++++ 1 file changed, 5 insertions(+) -- 1.7.9.5