From 0c739738a0eea868655ef26263d5350e6ab8cc69 Mon Sep 17 00:00:00 2001 From: Wolfram Sang Date: Wed, 23 Dec 2015 17:56:32 +0100 Subject: i2c: document binding for multi-master case We need this binding because some I2C master drivers will need to adapt their PM settings for the arbitration circuitry. Acked-by: Geert Uytterhoeven Acked-by: Rob Herring Signed-off-by: Wolfram Sang Signed-off-by: Wolfram Sang --- Documentation/devicetree/bindings/i2c/i2c.txt | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'Documentation/devicetree/bindings/i2c') diff --git a/Documentation/devicetree/bindings/i2c/i2c.txt b/Documentation/devicetree/bindings/i2c/i2c.txt index a00219f5ee07..c8d977ed847f 100644 --- a/Documentation/devicetree/bindings/i2c/i2c.txt +++ b/Documentation/devicetree/bindings/i2c/i2c.txt @@ -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. -- cgit v1.2.3