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i2c: add 'single-master' property to generic bindings

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It is useful to know if we are the only master on a given bus. Because
this is a HW description of the bus, add it to the generic bindings.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
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Wolfram Sang 2020-05-27 13:30:39 +02:00 committed by Wolfram Sang
parent fcb82a939d
commit fad5972a1e
1 changed files with 6 additions and 1 deletions
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7
Documentation/devicetree/bindings/i2c/i2c.txt
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@ -70,7 +70,12 @@ wants to support one of the below features, it should adapt these bindings.
- multi-master - multi-master
states that there is another master active on this bus. The OS can use 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 this information to adapt power management to keep the arbitration awake
all the time, for example. all the time, for example. Can not be combined with 'single-master'.
- single-master
states that there is no other master active on this bus. The OS can use
this information to detect a stalled bus more reliably, for example.
Can not be combined with 'multi-master'.
Required properties (per child device) Required properties (per child device)
-------------------------------------- --------------------------------------