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i2c: add binding to mark a bus as SMBus

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SMBus is largely compatible with I2C but there are some specifics. In
case we need them on a bus, we can now use this new binding.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
This commit is contained in:
Wolfram Sang 2020-07-01 23:48:30 +02:00 committed by Wolfram Sang
parent 60a9f851f6
commit e6277308ac
1 changed files with 5 additions and 0 deletions

5
Documentation/devicetree/bindings/i2c/i2c.txt
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@ -87,6 +87,11 @@ wants to support one of the below features, it should adapt these bindings.
this information to detect a stalled bus more reliably, for example.
Can not be combined with 'multi-master'.
- smbus
states that additional SMBus restrictions and features apply to this bus.
Examples of features are SMBusHostNotify and SMBusAlert. Examples of
restrictions are more reserved addresses and timeout definitions.
Required properties (per child device)
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