[PATCH v3 2/4] ARM64: dts: meson-gx: add clock to DT binding documentation for hwrng

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Add clock to DT binding documentation.

Signed-off-by: Heiner Kallweit <hkallweit1@xxxxxxxxx>
---
v2:
- splitted first version of patch into two
- add DT binding documentation
- mention that clock is optional
- replace spaces with tabs in DT binding example
v3:
- splitted DT extension and binding documentation update into two patches
---
 Documentation/devicetree/bindings/rng/amlogic,meson-rng.txt | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/rng/amlogic,meson-rng.txt b/Documentation/devicetree/bindings/rng/amlogic,meson-rng.txt
index 202f2d09..4d403645 100644
--- a/Documentation/devicetree/bindings/rng/amlogic,meson-rng.txt
+++ b/Documentation/devicetree/bindings/rng/amlogic,meson-rng.txt
@@ -6,9 +6,16 @@ Required properties:
 - compatible : should be "amlogic,meson-rng"
 - reg : Specifies base physical address and size of the registers.
 
+Optional properties:
+
+- clocks : phandle to the following named clocks
+- clock-names: Name of core clock, must be "core"
+
 Example:
 
 rng {
-        compatible = "amlogic,meson-rng";
-        reg = <0x0 0xc8834000 0x0 0x4>;
+	compatible = "amlogic,meson-rng";
+	reg = <0x0 0xc8834000 0x0 0x4>;
+	clocks = <&clkc CLKID_RNG0>;
+	clock-names = "core";
 };
-- 
2.11.1


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