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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
commit | 76cb841cb886eef6b3bee341a2266c76578724ad (patch) | |
tree | f5892e5ba6cc11949952a6ce4ecbe6d516d6ce58 /Documentation/devicetree/bindings/w1 | |
parent | Initial commit. (diff) | |
download | linux-76cb841cb886eef6b3bee341a2266c76578724ad.tar.xz linux-76cb841cb886eef6b3bee341a2266c76578724ad.zip |
Adding upstream version 4.19.249.upstream/4.19.249upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'Documentation/devicetree/bindings/w1')
-rw-r--r-- | Documentation/devicetree/bindings/w1/fsl-imx-owire.txt | 18 | ||||
-rw-r--r-- | Documentation/devicetree/bindings/w1/omap-hdq.txt | 22 | ||||
-rw-r--r-- | Documentation/devicetree/bindings/w1/w1-gpio.txt | 27 | ||||
-rw-r--r-- | Documentation/devicetree/bindings/w1/w1.txt | 25 |
4 files changed, 92 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/w1/fsl-imx-owire.txt b/Documentation/devicetree/bindings/w1/fsl-imx-owire.txt new file mode 100644 index 000000000..cbaa6467a --- /dev/null +++ b/Documentation/devicetree/bindings/w1/fsl-imx-owire.txt @@ -0,0 +1,18 @@ +* Freescale i.MX One wire bus master controller + +Required properties: +- compatible : should be "fsl,imx21-owire" +- reg : Address and length of the register set for the device + +Optional properties: +- clocks : phandle of clock that supplies the module (required if platform + clock bindings use device tree) + +Example: + +- From imx53.dtsi: +owire: owire@63fa4000 { + compatible = "fsl,imx53-owire", "fsl,imx21-owire"; + reg = <0x63fa4000 0x4000>; + clocks = <&clks 159>; +}; 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>; + }; + }; |