[PATCH] dt-bindings: i2c: st,stm32-i2c: Document wakeup-source property

[Marek Vasut]

Document wakeup-source property. This fixes dtbs_check warnings
when building current Linux DTs:

"
arch/arm/boot/dts/stm32mp153c-dhcom-drc02.dtb: i2c at 40015000: Unevaluated properties are not allowed ('wakeup-source' was unexpected)
"

Signed-off-by: Marek Vasut <marex at denx.de>
---
Cc: Alexandre Torgue <alexandre.torgue at foss.st.com>
Cc: Alain Volmat <alain.volmat at foss.st.com>
Cc: Rob Herring <robh+dt at kernel.org>
Cc: Wolfram Sang <wsa at kernel.org>
Cc: devicetree at vger.kernel.org
Cc: linux-i2c at vger.kernel.org
Cc: linux-stm32 at st-md-mailman.stormreply.com
To: linux-arm-kernel at lists.infradead.org
---
 Documentation/devicetree/bindings/i2c/st,stm32-i2c.yaml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/i2c/st,stm32-i2c.yaml b/Documentation/devicetree/bindings/i2c/st,stm32-i2c.yaml
index 63958cac339b7..bf396e9466aaf 100644
--- a/Documentation/devicetree/bindings/i2c/st,stm32-i2c.yaml
+++ b/Documentation/devicetree/bindings/i2c/st,stm32-i2c.yaml
@@ -97,6 +97,8 @@ properties:
           - description: register offset within syscfg
           - description: register bitmask for FMP bit
 
+  wakeup-source: true
+
 required:
   - compatible
   - reg
-- 
2.35.1