X-Git-Url: http://git.cascardo.info/?a=blobdiff_plain;f=Documentation%2Fdevicetree%2Fbindings%2Fpower%2Ftwl-charger.txt;h=3b4ea1b73b38293619c11c5483ef583229317611;hb=91cca0f0ffa3e485ad9d5b44744f23318c8f99ab;hp=d5c706216df55ddf9f07343c5c534618e6c036e5;hpb=6eb37eb276f0b91adb43b853ce6fb0812fbf0883;p=cascardo%2Flinux.git

diff --git a/Documentation/devicetree/bindings/power/twl-charger.txt b/Documentation/devicetree/bindings/power/twl-charger.txt
index d5c706216df5..3b4ea1b73b38 100644
--- a/Documentation/devicetree/bindings/power/twl-charger.txt
+++ b/Documentation/devicetree/bindings/power/twl-charger.txt
@@ -1,5 +1,15 @@
 TWL BCI (Battery Charger Interface)
 
+The battery charger needs to interact with the USB phy in order
+to know when charging is permissible, and when there is a connection
+or disconnection.
+
+The choice of phy cannot be configured at a hardware level, so there
+is no value in explicit configuration in device-tree.  Rather
+if there is a sibling of the BCI node which is compatible with
+"ti,twl4030-usb", then that is used to determine when and how
+use USB power for charging.
+
 Required properties:
 - compatible:
   - "ti,twl4030-bci"