dt-bindings: usb: Convert the generic EHCI binding to YAML
The generic EHCI binding is used by many controllers that are using the EHCI spec. Convert that binding to a YAML description to enable the validation on all the nodes using that binding. Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com> Acked-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>hifive-unleashed-5.2
Maxime Ripard
Greg Kroah-Hartman
parent
c93bcace10
commit
c3e2485d5f
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# SPDX-License-Identifier: GPL-2.0
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/usb/generic-ehci.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: USB EHCI Controller Device Tree Bindings
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allOf:
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- $ref: "usb-hcd.yaml"
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maintainers:
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- Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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properties:
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compatible:
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contains:
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const: generic-ehci
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reg:
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maxItems: 1
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interrupts:
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maxItems: 1
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resets:
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minItems: 1
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maxItems: 4
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clocks:
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minItems: 1
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maxItems: 4
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description: |
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In case the Renesas R-Car Gen3 SoCs:
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- if a host only channel: first clock should be host.
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- if a USB DRD channel: first clock should be host and second
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one should be peripheral
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big-endian:
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$ref: /schemas/types.yaml#/definitions/flag
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description:
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Set this flag for HCDs with big endian descriptors and big
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endian registers.
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big-endian-desc:
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$ref: /schemas/types.yaml#/definitions/flag
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description:
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Set this flag for HCDs with big endian descriptors.
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big-endian-regs:
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$ref: /schemas/types.yaml#/definitions/flag
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description:
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Set this flag for HCDs with big endian registers.
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has-transaction-translator:
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$ref: /schemas/types.yaml#/definitions/flag
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description:
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Set this flag if EHCI has a Transaction Translator built into
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the root hub.
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needs-reset-on-resume:
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$ref: /schemas/types.yaml#/definitions/flag
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description:
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Set this flag to force EHCI reset after resume.
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phys: true
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required:
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- compatible
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- reg
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- interrupts
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additionalProperties: false
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examples:
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- |
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ehci@e0000300 {
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compatible = "ibm,usb-ehci-440epx", "generic-ehci";
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interrupt-parent = <&UIC0>;
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interrupts = <0x1a 4>;
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reg = <0 0xe0000300 90 0 0xe0000390 70>;
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big-endian;
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};
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- |
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ehci0: usb@1c14000 {
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compatible = "allwinner,sun4i-a10-ehci", "generic-ehci";
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reg = <0x01c14000 0x100>;
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interrupts = <39>;
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clocks = <&ahb_gates 1>;
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phys = <&usbphy 1>;
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phy-names = "usb";
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};
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...
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@ -1,46 +0,0 @@
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USB EHCI controllers
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Required properties:
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- compatible : should be "generic-ehci".
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- reg : should contain at least address and length of the standard EHCI
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register set for the device. Optional platform-dependent registers
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(debug-port or other) can be also specified here, but only after
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definition of standard EHCI registers.
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- interrupts : one EHCI interrupt should be described here.
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Optional properties:
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- big-endian-regs : boolean, set this for hcds with big-endian registers
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- big-endian-desc : boolean, set this for hcds with big-endian descriptors
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- big-endian : boolean, for hcds with big-endian-regs + big-endian-desc
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- needs-reset-on-resume : boolean, set this to force EHCI reset after resume
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- has-transaction-translator : boolean, set this if EHCI have a Transaction
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Translator built into the root hub.
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- clocks : a list of phandle + clock specifier pairs. In case of Renesas
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R-Car Gen3 SoCs:
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- if a host only channel: first clock should be host.
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- if a USB DRD channel: first clock should be host and second one
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should be peripheral.
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- phys : see usb-hcd.txt in the current directory
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- resets : phandle + reset specifier pair
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additionally the properties from usb-hcd.txt (in the current directory) are
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supported.
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Example (Sequoia 440EPx):
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ehci@e0000300 {
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compatible = "ibm,usb-ehci-440epx", "usb-ehci";
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interrupt-parent = <&UIC0>;
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interrupts = <1a 4>;
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reg = <0 e0000300 90 0 e0000390 70>;
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big-endian;
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};
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Example (Allwinner sun4i A10 SoC):
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ehci0: usb@1c14000 {
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compatible = "allwinner,sun4i-a10-ehci", "generic-ehci";
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reg = <0x01c14000 0x100>;
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interrupts = <39>;
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clocks = <&ahb_gates 1>;
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phys = <&usbphy 1>;
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phy-names = "usb";
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};
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