[PATCH] dt-bindings: soc: samsung: usi: refer to dtschema for children

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Explicitly reference the dtschema for USI children implementing specific
serial protocol (I2C, SPI, UART).  The SPI schema is not yet accepted,
so it will be provided later.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxxxxx>
---
 .../bindings/soc/samsung/exynos-usi.yaml      | 19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

diff --git a/Documentation/devicetree/bindings/soc/samsung/exynos-usi.yaml b/Documentation/devicetree/bindings/soc/samsung/exynos-usi.yaml
index 58f2e9d8bb0e..f3aae7e0e2e6 100644
--- a/Documentation/devicetree/bindings/soc/samsung/exynos-usi.yaml
+++ b/Documentation/devicetree/bindings/soc/samsung/exynos-usi.yaml
@@ -18,11 +18,7 @@ description: |
   selects which particular function will be used.
 
   Refer to next bindings documentation for information on protocol subnodes that
-  can exist under USI node:
-
-  [1] Documentation/devicetree/bindings/serial/samsung_uart.yaml
-  [2] Documentation/devicetree/bindings/i2c/i2c-exynos5.txt
-  [3] Documentation/devicetree/bindings/spi/spi-samsung.txt
+  can exist under USI node.
 
 properties:
   $nodename:
@@ -75,10 +71,17 @@ properties:
       This property is optional.
 
 patternProperties:
-  # All other properties should be child nodes
-  "^(serial|spi|i2c)@[0-9a-f]+$":
+  "^i2c@[0-9a-f]+$":
+    $ref: /schemas/i2c/i2c-exynos5.yaml
+    description: Child node describing underlying I2C
+
+  "^serial@[0-9a-f]+$":
+    $ref: /schemas/serial/samsung_uart.yaml
+    description: Child node describing underlying UART/serial
+
+  "^spi@[0-9a-f]+$":
     type: object
-    description: Child node describing underlying USI serial protocol
+    description: Child node describing underlying SPI
 
 required:
   - compatible
-- 
2.32.0




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