STM32 SPI may be in a power domain which is the case for the STM32MP2x
based boards. Allow a single 'power-domains' entry for STM32 SPI.

Signed-off-by: Alain Volmat <alain.volmat@foss.st.com>
---
 Documentation/devicetree/bindings/spi/st,stm32-spi.yaml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/spi/st,stm32-spi.yaml b/Documentation/devicetree/bindings/spi/st,stm32-spi.yaml
index ca880a226afa..472e92974714 100644
--- a/Documentation/devicetree/bindings/spi/st,stm32-spi.yaml
+++ b/Documentation/devicetree/bindings/spi/st,stm32-spi.yaml
@@ -96,6 +96,9 @@ properties:
       The region should be defined as child node of the AHB SRAM node
       as per the generic bindings in Documentation/devicetree/bindings/sram/sram.yaml
 
+  power-domains:
+    maxItems: 1
+
   access-controllers:
     minItems: 1
     maxItems: 2

-- 
2.34.1