| Message ID | 3a0c6487c9503cf64432f630e65790cc5c3f70ab.1540189330.git.baolin.wang@linaro.org (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
| Series | [v6,1/6] dt-bindings: power: Introduce one property to present the battery internal resistance | expand |
On Mon, 22 Oct 2018 15:43:59 +0800, Baolin Wang wrote: > Some battery driver will use the open circuit voltage (OCV) value to look > up the corresponding battery capacity percent in one certain degree Celsius. > Thus this patch provides some battery properties to present the OCV table > temperatures and OCV capacity table values. > > Suggested-by: Sebastian Reichel <sre@kernel.org> > Signed-off-by: Baolin Wang <baolin.wang@linaro.org> > Reviewed-by: Linus Walleij <linus.walleij@linaro.org> > --- > Changes from v5: > - None. > > Changes from v4: > - Improve the description of ocv-capacity-table-n to make the order clear. > > Changes from v3: > - Split binding into one separate patch. > - Rename ocv-capacity-table-temperatures to ocv-capacity-celsius. > - Add some words to specify the OCV's unit. > > Changes from v2: > - Use type __be32 to calculate the table length. > - Update error messages. > - Add some helper functions. > > Changes from v1: > - New patch in v2. > --- > .../devicetree/bindings/power/supply/battery.txt | 15 +++++++++++++++ > 1 file changed, 15 insertions(+) > Reviewed-by: Rob Herring <robh@kernel.org>
diff --git a/Documentation/devicetree/bindings/power/supply/battery.txt b/Documentation/devicetree/bindings/power/supply/battery.txt index 938d027..89871ab 100644 --- a/Documentation/devicetree/bindings/power/supply/battery.txt +++ b/Documentation/devicetree/bindings/power/supply/battery.txt @@ -23,6 +23,17 @@ Optional Properties: - constant-charge-current-max-microamp: maximum constant input current - constant-charge-voltage-max-microvolt: maximum constant input voltage - factory-internal-resistance-micro-ohms: battery factory internal resistance + - ocv-capacity-table-0: An array providing the open circuit voltage (OCV) + of the battery and corresponding battery capacity percent, which is used + to look up battery capacity according to current OCV value. And the open + circuit voltage unit is microvolt. + - ocv-capacity-table-1: Same as ocv-capacity-table-0 + ...... + - ocv-capacity-table-n: Same as ocv-capacity-table-0 + - ocv-capacity-celsius: An array containing the temperature in degree Celsius, + 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. Battery properties are named, where possible, for the corresponding elements in enum power_supply_property, defined in @@ -44,6 +55,10 @@ Example: constant-charge-current-max-microamp = <900000>; constant-charge-voltage-max-microvolt = <4200000>; factory-internal-resistance-micro-ohms = <250000>; + ocv-capacity-celsius = <(-10) 0 10>; + 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>, ...; }; charger: charger@11 {