From 182fc88268f3e33fb81cbb373b30d656daf0cb48 Mon Sep 17 00:00:00 2001 From: Jean-Francois Dagenais Date: Wed, 13 May 2020 20:56:11 +0200 Subject: power: supply: sbs-battery: add ability to disable charger broadcasts In certain designs, it is possible to add a battery on a populated i2c bus without an sbs compliant charger. In that case, the battery will unnecessarily and sometimes undesirably master the bus trying to write info in the charger. It is observed in many occasion that these battery "broadcasts" are even corrupting other ongoing master to slave communication. I.e. the multi-master support in the battery is inadequate. Thankfully, the CHARGER_MODE bit allows designers to disable that SBS battery behaviour. This needs to be done once when the battery is first seen on the bus. Signed-off-by: Jean-Francois Dagenais [rebased code] Signed-off-by: Sebastian Reichel --- Documentation/devicetree/bindings/power/supply/sbs_sbs-battery.txt | 2 ++ 1 file changed, 2 insertions(+) (limited to 'Documentation/devicetree/bindings/power') diff --git a/Documentation/devicetree/bindings/power/supply/sbs_sbs-battery.txt b/Documentation/devicetree/bindings/power/supply/sbs_sbs-battery.txt index fa5a8b516dbf..a5093ccef5c5 100644 --- a/Documentation/devicetree/bindings/power/supply/sbs_sbs-battery.txt +++ b/Documentation/devicetree/bindings/power/supply/sbs_sbs-battery.txt @@ -16,6 +16,7 @@ Optional properties : after an external change notification. - sbs,battery-detect-gpios : The gpio which signals battery detection and a flag specifying its polarity. + - sbs,disable-charger-broadcasts: for systems without sbs compliant chargers Example: @@ -25,4 +26,5 @@ Example: sbs,i2c-retry-count = <2>; sbs,poll-retry-count = <10>; sbs,battery-detect-gpios = <&gpio-controller 122 1>; + sbs,disable-charger-broadcasts; } -- cgit v1.2.3