From dfa32e119de5baaab1f08e66330d3787a0a8957a Mon Sep 17 00:00:00 2001 From: Daniel Mack Date: Fri, 6 Jul 2018 07:35:48 +0200 Subject: [PATCH] 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 Reviewed-by: Rob Herring Signed-off-by: Sebastian Reichel --- Documentation/devicetree/bindings/w1/w1-gpio.txt | 11 ++++++++--- Documentation/devicetree/bindings/w1/w1.txt | 25 ++++++++++++++++++++++++ 2 files changed, 33 insertions(+), 3 deletions(-) create mode 100644 Documentation/devicetree/bindings/w1/w1.txt diff --git a/Documentation/devicetree/bindings/w1/w1-gpio.txt b/Documentation/devicetree/bindings/w1/w1-gpio.txt index 6e09c35..3d6554e 100644 --- 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 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>; + }; + }; -- 2.7.4