Re: [PATCH v11 01/10] devicetree: power: Add battery.txt
From: Sebastian Reichel <hidden>
Date: 2017-03-23 10:20:06
Also in:
linux-devicetree
Hi, On Mon, Mar 20, 2017 at 02:43:26AM -0700, Liam Breck wrote:
quoted hunk
From: Liam Breck <redacted> Documentation of static battery characteristics that can be defined for batteries which cannot self-identify. This information is required by fuel-gauge and charger chips for proper handling of the battery. Cc: Rob Herring <redacted> Cc: devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Signed-off-by: Matt Ranostay <redacted> Signed-off-by: Liam Breck <redacted> --- .../devicetree/bindings/power/supply/battery.txt | 43 ++++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 Documentation/devicetree/bindings/power/supply/battery.txtdiff --git a/Documentation/devicetree/bindings/power/supply/battery.txt b/Documentation/devicetree/bindings/power/supply/battery.txt new file mode 100644 index 0000000..53a68c0 --- /dev/null +++ b/Documentation/devicetree/bindings/power/supply/battery.txt@@ -0,0 +1,43 @@ +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. + +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 + +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#n86
The above paragraph does not belong into DT bindings. Apart from that Acked-by: Sebastian Reichel <redacted> FYI: I will wait for Acked-by from Rob Herring on this patch. -- Sebastian
+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>;
+ };
+
+ charger: charger@11 {
+ ....
+ monitored-battery = <&bat>;
+ ...
+ };
+
+ fuel_gauge: fuel-gauge@22 {
+ ....
+ monitored-battery = <&bat>;
+ ...
+ };
--
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