[PATCH v4 1/2] 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@xxxxxxxxxxx>
---
 Documentation/devicetree/bindings/i2c/i2c.txt | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/i2c/i2c.txt b/Documentation/devicetree/bindings/i2c/i2c.txt
index df41f72afc87..b864916e087f 100644
--- a/Documentation/devicetree/bindings/i2c/i2c.txt
+++ b/Documentation/devicetree/bindings/i2c/i2c.txt
@@ -89,8 +89,11 @@ wants to support one of the below features, it should adapt these bindings.
 
 - 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.
+	An example of feature is SMBusHostNotify. Examples of restrictions are
+	more reserved addresses and timeout definitions.
+
+- smbus-alert
+	states that the optional SMBus-Alert feature apply to this bus.
 
 Required properties (per child device)
 --------------------------------------
-- 
2.7.4




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