[PATCH v2] dt-bindings: spi: rockchip: add power-domains property

[Johan Jonker <jbx6244@xxxxxxxxx>]

The Rockchip rk3399 TRM mentions that pd_sdioaudio includes
sdio, spi, i2s and spdif. Add a power-domains property to
to match reality with spi-rockchip.yaml.

Signed-off-by: Johan Jonker <jbx6244@xxxxxxxxx>
Acked-by: Heiko Stuebner <heiko@xxxxxxxxx>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>
---

Changed V2:
  Fix comment
---
 Documentation/devicetree/bindings/spi/spi-rockchip.yaml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/spi/spi-rockchip.yaml b/Documentation/devicetree/bindings/spi/spi-rockchip.yaml
index 52768894b..66e49947b 100644
--- a/Documentation/devicetree/bindings/spi/spi-rockchip.yaml
+++ b/Documentation/devicetree/bindings/spi/spi-rockchip.yaml
@@ -82,6 +82,9 @@ properties:
       where the "sleep" configuration may describe the state
       the pins should be in during system suspend.
 
+  power-domains:
+    maxItems: 1
+
 required:
   - compatible
   - reg
-- 
2.20.1