[PATCH lora-next 3/4] dt-bindings: lora: sx125x: add clock bindings

Ben Whitten
2019-01-08T08:42:28Z

The sx125x consumes a 32MHz clock and if it is coupled with a sx130x
concentrator may also provide a gated version of this 32MHz for the
concentrator.

In the example we connect to output 0 of "txco" clock source. The radio
also provides a single clock output, hence "#clock-cells = <0>", named
"clk32m" for consumption by the sx130x concentrator.

Signed-off-by: Ben Whitten <ben.whitten@gmail.com>
---
.../{ => net}/lora/semtech,sx125x.yaml | 27 +++++++++++++++++++
1 file changed, 27 insertions(+)
rename Documentation/devicetree/bindings/{ => net}/lora/semtech,sx125x.yaml (67%)

diff --git a/Documentation/devicetree/bindings/lora/semtech,sx125x.yaml b/Documentation/devicetree/bindings/net/lora/semtech,sx125x.yaml
similarity index 67%
rename from Documentation/devicetree/bindings/lora/semtech,sx125x.yaml
rename to Documentation/devicetree/bindings/net/lora/semtech,sx125x.yaml
index 5eadec860b70..c2fb4ac06341 100644
--- a/Documentation/devicetree/bindings/lora/semtech,sx125x.yaml
+++ b/Documentation/devicetree/bindings/net/lora/semtech,sx125x.yaml
@@ -33,13 +33,40 @@ properties:
description: The frequency of the SPI communication to the radio,
in Hz. Maximum SPI frequency is 10MHz.

+ clocks:
+ maxItems: 1
+ description: 32MHz clock provider
+
+ clock-names:
+ items:
+ - const: txco
+
+ clock-output-names:
+ items:
+ - const: clk32m
+ description: 32MHz output clock name
+
+ '#clock-cells':
+ const: 0
+
required:
- compatible
- reg

examples:
- |
+ tcxo: dummy32m {
+ compatible = "fixed-clock";
+ clock-frequency = <32000000>;
+ clock-output-names = "tcxo";
+ #clock-cells = <0>;
+ };
+
radio0: lora@0 {
compatible = "semtech,sx1257";
reg = <0>;
+ clocks = <&tcxo 0>;
+ clock-names = "tcxo";
+ clock-output-names = "clk32m";
+ #clock-cells = <0>;
};
--
2.17.1