From mboxrd@z Thu Jan 1 00:00:00 1970 From: Liam Breck Subject: [PATCH v11 01/10] devicetree: power: Add battery.txt Date: Mon, 20 Mar 2017 02:43:26 -0700 Message-ID: <20170320094335.19224-2-liam@networkimprov.net> References: <20170320094335.19224-1-liam@networkimprov.net> Return-path: In-Reply-To: <20170320094335.19224-1-liam-RYWXG+zxWwBdeoIcmNTgJF6hYfS7NtTn@public.gmane.org> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Sebastian Reichel Cc: "Andrew F. Davis" , linux-pm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Matt Ranostay , Rob Herring , devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Liam Breck List-Id: devicetree@vger.kernel.org From: Liam Breck 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 Cc: devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Signed-off-by: Matt Ranostay Signed-off-by: Liam Breck --- .../devicetree/bindings/power/supply/battery.txt | 43 ++++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 Documentation/devicetree/bindings/power/supply/battery.txt diff --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 + +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>; + ... + }; -- 2.9.3 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html