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i2c: add binding to mark a bus as supporting SMBus-Alert

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Since SMBus-Alert is an optional feature of SMBUS which
requires an additional pin, the smbus binding cannot be
used to indicate its support.

Add an additional smbus-alert binding specific for it and
update the description text of smbus to avoid mentioning
SMBus-Alert

Signed-off-by: Alain Volmat <alain.volmat@foss.st.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
This commit is contained in:
Alain Volmat 2021-05-05 15:14:38 +02:00 committed by Wolfram Sang
parent e653312b5b
commit 168290fb26
1 changed files with 5 additions and 2 deletions
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7
Documentation/devicetree/bindings/i2c/i2c.txt
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@ -89,8 +89,11 @@ wants to support one of the below features, it should adapt these bindings.
- smbus - smbus
states that additional SMBus restrictions and features apply to this bus. states that additional SMBus restrictions and features apply to this bus.
Examples of features are SMBusHostNotify and SMBusAlert. Examples of An example of feature is SMBusHostNotify. Examples of restrictions are
restrictions are more reserved addresses and timeout definitions. more reserved addresses and timeout definitions.
- smbus-alert
states that the optional SMBus-Alert feature apply to this bus.
Required properties (per child device) Required properties (per child device)
-------------------------------------- --------------------------------------