On Fri, Jul 06, 2018 at 07:35:48AM +0200, Daniel Mack wrote:
> 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@xxxxxxxxxx>
> ---
> .../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
Reviewed-by: Rob Herring <robh@xxxxxxxxxx>
Note that this will conflict with a unit-address fix that I have queued
up for 4.18 (will send this week).
>
> diff --git a/Documentation/devicetree/bindings/w1/w1-gpio.txt b/Documentation/devicetree/bindings/w1/w1-gpio.txt
> index 6e09c35d9f1a..3d6554eac240 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 000000000000..05f26b27d898
> --- /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>;
> + };
> + };
> --
> 2.17.1
>
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