i2c: document binding for multi-master case
authorWolfram Sang <wsa+renesas@sang-engineering.com>
Wed, 23 Dec 2015 16:56:32 +0000 (17:56 +0100)
committerWolfram Sang <wsa@the-dreams.de>
Sat, 2 Jan 2016 21:10:32 +0000 (22:10 +0100)
We need this binding because some I2C master drivers will need to adapt
their PM settings for the arbitration circuitry.

Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Documentation/devicetree/bindings/i2c/i2c.txt

index a00219f5ee0733ec25efcc9e78dd2120b55b3916..c8d977ed847f3c32a04cd35ac8f995e1730659b2 100644 (file)
@@ -54,6 +54,11 @@ wants to support one of the below features, it should adapt the bindings below.
        "irq" and "wakeup" names are recognized by I2C core, other names are
        left to individual drivers.
 
+- multi-master
+       states that there is another master active on this bus. The OS can use
+       this information to adapt power management to keep the arbitration awake
+       all the time, for example.
+
 - wakeup-source
        device can be used as a wakeup source.