dt-bindings: w1: document generic onewire bindings

This patch adds a generic w1 bindings document that describes how w1
slave deviceses are grouped under master nodes. It also augments the
existing w1-gpio.txt document a bit.

Signed-off-by: Daniel Mack <daniel@zonque.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>

diff --git a/Documentation/devicetree/bindings/w1/w1-gpio.txt b/Documentation/devicetree/bindings/w1/w1-gpio.txt
index 6e09c35..3d6554e 100644 (file)
--- a/Documentation/devicetree/bindings/w1/w1-gpio.txt
+++ b/Documentation/devicetree/bindings/w1/w1-gpio.txt
@@ -13,10 +13,15 @@ Optional properties:
  - linux,open-drain: if specified, the data pin is considered in
                     open-drain mode.
 
+Also refer to the generic w1.txt document.
+
 Examples:
 
-       onewire@0 {
+       onewire {
                compatible = "w1-gpio";
-               gpios = <&gpio 126 0>, <&gpio 105 0>;
-       };
+               gpios = <&gpio 0 GPIO_ACTIVE_HIGH>;
 
+               battery {
+                       // ...
+               };
+       };

diff --git a/Documentation/devicetree/bindings/w1/w1.txt b/Documentation/devicetree/bindings/w1/w1.txt
new file mode 100644 (file)
index 0000000..05f26b2
--- /dev/null
+++ b/Documentation/devicetree/bindings/w1/w1.txt
@@ -0,0 +1,25 @@
+Generic devicetree bindings for onewire (w1) busses
+===================================================
+
+Onewire busses are described through nodes of their master bus controller.
+Slave devices are listed as sub-nodes of such master devices. For now, only
+one slave is allowed per bus master.
+
+
+Example:
+
+       charger: charger {
+               compatible = "gpio-charger";
+               charger-type = "mains";
+               gpios = <&gpio 1 GPIO_ACTIVE_LOW>;
+       };
+
+       onewire {
+               compatible = "w1-gpio";
+               gpios = <&gpio 100 0>, <&gpio 101 0>;
+
+               battery {
+                       compatible = "maxim,ds2760";
+                       power-supplies = <&charger>;
+               };
+       };