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-rw-r--r--Documentation/devicetree/bindings/w1/fsl-imx-owire.yaml44
-rw-r--r--Documentation/devicetree/bindings/w1/omap-hdq.txt22
-rw-r--r--Documentation/devicetree/bindings/w1/w1-gpio.txt27
-rw-r--r--Documentation/devicetree/bindings/w1/w1.txt25
4 files changed, 118 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/w1/fsl-imx-owire.yaml b/Documentation/devicetree/bindings/w1/fsl-imx-owire.yaml
new file mode 100644
index 000000000..55adea827
--- /dev/null
+++ b/Documentation/devicetree/bindings/w1/fsl-imx-owire.yaml
@@ -0,0 +1,44 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/w1/fsl-imx-owire.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale i.MX One wire bus master controller
+
+maintainers:
+ - Martin Fuzzey <mfuzzey@parkeon.com>
+
+properties:
+ compatible:
+ oneOf:
+ - const: fsl,imx21-owire
+ - items:
+ - enum:
+ - fsl,imx27-owire
+ - fsl,imx50-owire
+ - fsl,imx51-owire
+ - fsl,imx53-owire
+ - const: fsl,imx21-owire
+
+ reg:
+ maxItems: 1
+
+ clocks:
+ maxItems: 1
+
+required:
+ - compatible
+ - reg
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/clock/imx5-clock.h>
+
+ owire@63fa4000 {
+ compatible = "fsl,imx53-owire", "fsl,imx21-owire";
+ reg = <0x63fa4000 0x4000>;
+ clocks = <&clks IMX5_CLK_OWIRE_GATE>;
+ };
diff --git a/Documentation/devicetree/bindings/w1/omap-hdq.txt b/Documentation/devicetree/bindings/w1/omap-hdq.txt
new file mode 100644
index 000000000..913c5f91a
--- /dev/null
+++ b/Documentation/devicetree/bindings/w1/omap-hdq.txt
@@ -0,0 +1,22 @@
+* OMAP HDQ One wire bus master controller
+
+Required properties:
+- compatible : should be "ti,omap3-1w" or "ti,am4372-hdq"
+- reg : Address and length of the register set for the device
+- interrupts : interrupt line.
+- ti,hwmods : "hdq1w"
+
+Optional properties:
+- ti,mode: should be "hdq": HDQ mode "1w": one-wire mode.
+ If not specified HDQ mode is implied.
+
+Example:
+
+- From omap3.dtsi
+ hdqw1w: 1w@480b2000 {
+ compatible = "ti,omap3-1w";
+ reg = <0x480b2000 0x1000>;
+ interrupts = <58>;
+ ti,hwmods = "hdq1w";
+ ti,mode = "hdq";
+ };
diff --git a/Documentation/devicetree/bindings/w1/w1-gpio.txt b/Documentation/devicetree/bindings/w1/w1-gpio.txt
new file mode 100644
index 000000000..3d6554eac
--- /dev/null
+++ b/Documentation/devicetree/bindings/w1/w1-gpio.txt
@@ -0,0 +1,27 @@
+w1-gpio devicetree bindings
+
+Required properties:
+
+ - compatible: "w1-gpio"
+ - gpios: one or two GPIO specs:
+ - the first one is used as data I/O pin
+ - the second one is optional. If specified, it is used as
+ enable pin for an external pin pullup.
+
+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 {
+ compatible = "w1-gpio";
+ 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 000000000..05f26b27d
--- /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>;
+ };
+ };