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dt-bindings: w1: document generic onewire bindings

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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>
This commit is contained in:
Daniel Mack 2018-07-06 07:35:48 +02:00 committed by Sebastian Reichel
parent ce397d215c
commit dfa32e119d
2 changed files with 33 additions and 3 deletions
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11
Documentation/devicetree/bindings/w1/w1-gpio.txt
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@ -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 {
// ...
};
};

25
Documentation/devicetree/bindings/w1/w1.txt Normal file
View File

@ -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>;
};
};