Documentation: remove devicetree docs
Remove the barebox devicetree documentation. It will be replaced with sphinx based documentation later. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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barebox uses the same devicetree bindings as the kernel. For
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the bindings derived from the kernel look in the kernel sources
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for reference.
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barebox specific bindings are documented here.
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barebox specific devicetree bindings
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====================================
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barebox uses some barebox specific devicetree bindings. All of these
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are under the /chosen/ hierarchy in the devicetree.
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The bindings have the form of a device with regular 'compatible' properties.
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drivers matching these devices do not handle physical devices but instead
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influence / configure certain behaviours of barebox like the place where to
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find the persistent environment.
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barebox environment
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===================
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This driver provides an environment for barebox from the devicetree.
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Required properties:
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- compatible: should be "barebox,environment"
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- device-path: path to the environment
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The device-path is a multistring property. The first string should be a
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nodepath to the node containing the physical device of the environment.
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The subsequent strings are of the form <type>:<options> to further describe
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the path to the environment. Supported values for <type>:
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partname:<partname> This describes a partition on a device. <partname> can
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be the label for mtd partitions, the number for DOS
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partitions (beginning with 0) or the name for GPT
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partitions
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Example:
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environment@0 {
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compatible = "barebox,environment";
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device-path = &flash, "partname:barebox-environment";
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};
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Common leds properties.
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- linux,default-trigger barebox,default-trigger: This parameter, if present, is a
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string defining the trigger assigned to the LED. Current triggers are:
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"heartbeat" - LED flashes at a constant rate
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"panic" - LED turns on when barebox panics
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"net" - LED indicates network activity
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Freescale i.MX IIM (Ic Identification Module)
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Required properties:
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- compatible: fsl,imx27-iim
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- reg: physical register base and size
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Optional properties:
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- barebox,provide-mac-address: Provide MAC addresses for ethernet devices. This
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can be multiple entries in the form <&phandle bankno fuseofs> to specify a MAC
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address to a ethernet device.
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Example:
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iim: iim@83f98000 {
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compatible = "fsl,imx51-iim", "fsl,imx27-iim";
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reg = <0x83f98000 0x4000>;
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barebox,provide-mac-address = <&fec 1 9>;
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};
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Freescale i.MX OCOTP (On-Chip OTP)
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Required properties:
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- compatible: fsl,imx6q-ocotp
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- reg: physical register base and size
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Optional properties:
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- barebox,provide-mac-address: Provide MAC addresses for ethernet devices. This
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can be multiple entries in the form <&phandle regofs> to specify a MAC
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address to a ethernet device.
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Example:
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ocotp1: ocotp@021bc000 {
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compatible = "fsl,imx6q-ocotp";
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reg = <0x021bc000 0x4000>;
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barebox,provide-mac-address = <&fec 0x620>;
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};
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