From: Wolfram Sang <>

We need this binding because some I2C master drivers will need to adapt
their PM settings for the arbitration circuitry. I skipped the "i2c-"
prefix because I can imagine to be useful outside of i2c.

Signed-off-by: Wolfram Sang <>
 Documentation/devicetree/bindings/i2c/i2c.txt | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/i2c/i2c.txt 
index a00219f5ee0733..c8d977ed847f3c 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.

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