dt-bindings: net: Add binding for the external clock for TI WiLink

The external clock is provided to the TI WiLink combo chip and it's needed
for any of the transport interfaces. However let's make it optional to
avoid breaking existing platforms that yet doesn't specify the clock.

Fixes: ea452678734e ("arm64: dts: hikey: Fix WiFi support")
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

diff --git a/Documentation/devicetree/bindings/net/ti,wilink-st.txt b/Documentation/devicetree/bindings/net/ti,wilink-st.txt
index b1a421e2fde3665e0abf77a79635540fd4382184..1649c1f66b079a74c5b218caf6196692c2104b14 100644 (file)
--- a/Documentation/devicetree/bindings/net/ti,wilink-st.txt
+++ b/Documentation/devicetree/bindings/net/ti,wilink-st.txt
@@ -28,6 +28,10 @@ Optional properties:
  - enable-gpios : GPIO signal controlling enabling of BT. Active high.
  - vio-supply : Vio input supply (1.8V)
  - vbat-supply : Vbat input supply (2.9-4.8V)
+ - clocks : Must contain an entry, for each entry in clock-names.
+   See ../clocks/clock-bindings.txt for details.
+ - clock-names : Must include the following entry:
+   "ext_clock" (External clock provided to the TI combo chip).
 
 Example:
 
@@ -37,5 +41,7 @@ Example:
        bluetooth {
                compatible = "ti,wl1835-st";
                enable-gpios = <&gpio1 7 GPIO_ACTIVE_HIGH>;
+               clocks = <&clk32k_wl18xx>;
+               clock-names = "ext_clock";
        };
 };