dt-bindings: power: supply: max17040: Add maxim,rcomp

To compensate for the battery chemistry and operating conditions the
chips support a compensation value. Specify one or two byte compensation
via the maxim,rcomp byte array.

Signed-off-by: Iskren Chernev <iskren.chernev@gmail.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>

diff --git a/Documentation/devicetree/bindings/power/supply/max17040_battery.txt b/Documentation/devicetree/bindings/power/supply/max17040_battery.txt
index 5aa83e7..c802f66 100644 (file)
--- a/Documentation/devicetree/bindings/power/supply/max17040_battery.txt
+++ b/Documentation/devicetree/bindings/power/supply/max17040_battery.txt
@@ -17,6 +17,11 @@ Optional properties :
                                Specify this boolean property to divide the
                                reported value in 2 and thus normalize it.
                                SOC == State of Charge == Capacity.
+- maxim,rcomp :                        A value to compensate readings for various
+                               battery chemistries and operating temperatures.
+                               max17040,41 have 2 byte rcomp, default to
+                               0x97 0x00. All other devices have one byte
+                               rcomp, default to 0x97.
 - interrupts :                         Interrupt line see Documentation/devicetree/
                                bindings/interrupt-controller/interrupts.txt
 - wakeup-source :              This device has wakeup capabilities. Use this
@@ -41,6 +46,7 @@ Example:
        battery-fuel-gauge@36 {
                compatible = "maxim,max17048";
                reg = <0x36>;
+               maxim,rcomp = /bits/ 8 <0x56>;
                maxim,alert-low-soc-level = <10>;
                maxim,double-soc;
        };