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Date: Thu, 24 Jan 2019 14:53:06 +0000
From: Ben Whitten <ben.whitten@...il.com>
To: afaerber@...e.de
Cc: davem@...emloft.net, robh+dt@...nel.org, mark.rutland@....com,
netdev@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, Ben Whitten <ben.whitten@...il.com>
Subject: [PATCH v3 lora-next 1/4] dt-bindings: lora: sx130x: add basic documentation
From: Ben Whitten <ben.whitten@...il.com>
Add basic documentation in YAML format for the SX130x series concentrators
from Semtech.
Required is; the location on the SPI bus and the compatible string.
Signed-off-by: Ben Whitten <ben.whitten@...il.com>
---
v2 -> v3:
* Corrected fallback notation
* Limited radio node names from anything to 'radio@'
v1 -> v2:
* Dropped reset-gpios, radio-spi from required.
* Dropped spi-max-frequency from binding.
* Changed compatible to allow fallback from SX1308 to SX1301.
* Wording changes in commit and descriptions.
* Dual licence
* Incorperate Robs comments on child node and spi wrapper
---
.../bindings/net/lora/semtech,sx130x.yaml | 101 ++++++++++++++++++
1 file changed, 101 insertions(+)
create mode 100644 Documentation/devicetree/bindings/net/lora/semtech,sx130x.yaml
diff --git a/Documentation/devicetree/bindings/net/lora/semtech,sx130x.yaml b/Documentation/devicetree/bindings/net/lora/semtech,sx130x.yaml
new file mode 100644
index 000000000000..24fad1218735
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/lora/semtech,sx130x.yaml
@@ -0,0 +1,101 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/lora/semtech,sx130x.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Semtech LoRa concentrator
+
+maintainers:
+ - Andreas Färber <afaerber@...e.de>
+ - Ben Whitten <ben.whitten@...il.com>
+
+description: |
+ Semtech LoRa concentrator SX130x digital baseband chip is capable of
+ demodulating LoRa signals on 8 channels simultaneously.
+
+ It is typically paired with two SX125x IQ radios controlled over an
+ SPI directly from the concentrator.
+
+ The concentrator itself is controlled over SPI.
+
+properties:
+ compatible:
+ oneOf:
+ - items:
+ - enum:
+ - semtech,sx1308
+ - const: semtech,sx1301
+ - items:
+ - const: semtech,sx1301
+
+ reg:
+ maxItems: 1
+ description: The chip select on the SPI bus.
+
+ reset-gpios:
+ maxItems: 1
+ description: A connection of the reset gpio line.
+
+ radio-spi:
+ type: object
+ description: The concentrator can have two radios connected which are
+ contained within the following node.
+
+ properties:
+ '#address-cells':
+ const: 1
+
+ '#size-cells':
+ const: 0
+
+ patternProperties:
+ "^radio@[0-1]$":
+ type: object
+ properties:
+ reg:
+ maxItems: 1
+ minimum: 0
+ maximum: 1
+ required:
+ - reg
+
+ required:
+ - '#address-cells'
+ - '#size-cells'
+
+required:
+ - compatible
+ - reg
+
+examples:
+ - |
+
+ #include <dt-bindings/gpio/gpio.h>
+
+ spi {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ concentrator0: lora@0 {
+ compatible = "semtech,sx1301";
+ reg = <0>;
+ reset-gpios = <&pioB 27 GPIO_ACTIVE_HIGH>;
+ spi-max-frequency = <8000000>;
+
+ radio-spi {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ radio0: radio@0 {
+ compatible = "semtech,sx1257";
+ reg = <0>;
+ };
+
+ radio1: radio@1 {
+ compatible = "semtech,sx1257";
+ reg = <1>;
+ };
+ };
+ };
+ };
--
2.17.1
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