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Date: Wed, 18 Dec 2019 17:04:27 -0600
From: Rob Herring <robh+dt@...nel.org>
To: Benjamin Gaignard <benjamin.gaignard@...com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Mark Rutland <mark.rutland@....com>,
Linux USB List <linux-usb@...r.kernel.org>,
devicetree@...r.kernel.org,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] dt-bindings: usb: Convert DWC2 bindings to json-schema
On Wed, Dec 18, 2019 at 8:25 AM Benjamin Gaignard
<benjamin.gaignard@...com> wrote:
>
> Convert DWC2 bindings to DT schema format using json-schema.
> DWC2 is widely use but a couple of compatibles and properties
> (vusb_d-supply,vusb_a-supply) were missing in dwc2.txt, the
> patch add them.
>
> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@...com>
> ---
> Notes:
> I have put Greg Kroah-Hartman has maintainer of this file
> because it was the first entry when calling get_maintainers.pl
> on dwc2.txt. All my apologies if that is an incorrect guess,
> raise your hands if you know who should be the maintainer(s)
> for this file.
DWC2 driver maintainer? Someone in ST that knows this h/w? Otherwise,
you can put me if no one else.
> Documentation/devicetree/bindings/usb/dwc2.txt | 64 ---------
> Documentation/devicetree/bindings/usb/dwc2.yaml | 178 ++++++++++++++++++++++++
> 2 files changed, 178 insertions(+), 64 deletions(-)
> delete mode 100644 Documentation/devicetree/bindings/usb/dwc2.txt
> create mode 100644 Documentation/devicetree/bindings/usb/dwc2.yaml
> diff --git a/Documentation/devicetree/bindings/usb/dwc2.yaml b/Documentation/devicetree/bindings/usb/dwc2.yaml
> new file mode 100644
> index 000000000000..2c11626e3bc3
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/usb/dwc2.yaml
> @@ -0,0 +1,178 @@
> +# SPDX-License-Identifier: GPL-2.0
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/usb/dwc2.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: DesignWare HS OTG USB 2.0 controller Bindings
> +
> +maintainers:
> + - Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> +
> +properties:
> + compatible:
> + oneOf:
> + - const: brcm,bcm2835-usb
> + description: The DWC2 USB controller instance in the BCM2835 SoC
I think it's a bit easier to read if the description is first.
Personally, I find the description a bit redundant and would just drop
it.
> + - const: hisilicon,hi6220-usb
> + description: The DWC2 USB controller instance in the hi6220 SoC
> + - items:
> + - const: rockchip,rk3066-usb
> + - const: snps,dwc2
> + description: The DWC2 USB controller instance in the rk3066 Soc
> + - items:
> + - const: rockchip,px30-usb
> + - const: rockchip,rk3066-usb
> + - const: snps,dwc2
> + description: The DWC2 USB controller instance in the px30 Soc
> + - items:
> + - const: rockchip,rk3036-usb
> + - const: rockchip,rk3066-usb
> + - const: snps,dwc2
> + description: The DWC2 USB controller instance in the rk3036 Soc
> + - items:
> + - const: rockchip,rv1108-usb
> + - const: rockchip,rk3066-usb
> + - const: snps,dwc2
> + description: The DWC2 USB controller instance in the rv1108 Soc
> + - items:
> + - const: rockchip,rk3188-usb
> + - const: rockchip,rk3066-usb
> + - const: snps,dwc2
> + description: The DWC2 USB controller instance in the rk3188 Soc
> + - items:
> + - const: rockchip,rk3228-usb
> + - const: rockchip,rk3066-usb
> + - const: snps,dwc2
> + description: The DWC2 USB controller instance in the rk3228 Soc
> + - items:
> + - const: rockchip,rk3288-usb
> + - const: rockchip,rk3066-usb
> + - const: snps,dwc2
> + description: The DWC2 USB controller instance in the rk3288 Soc
> + - const: lantiq,arx100-usb
> + description: The DWC2 USB controller instance in Lantiq ARX SoCs
> + - const: lantiq,xrx200-usb
> + description: The DWC2 USB controller instance in Lantiq XRX SoCs
> + - items:
> + - const: amlogic,meson8-usb
> + - const: snps,dwc2
> + description: The DWC2 USB controller instance in Amlogic Meson8 SoCs
> + - items:
> + - const: amlogic,meson8b-usb
> + - const: snps,dwc2
> + description: The DWC2 USB controller instance in Amlogic Meson8b SoCs
> + - const: amlogic,meson-gxbb-usb
> + description: The DWC2 USB controller instance in Amlogic S905 SoCs
> + - items:
> + - const: amlogic,meson-g12a-usb
> + - const: snps,dwc2
> + description: The DWC2 USB controller instance in Amlogic G12A SoCs
> + - const: amcc,dwc-otg
> + description: The DWC2 USB controller instance in AMCC Canyonlands 460EX SoCs
> + - const: snps,dwc2
> + description: generic DWC2 USB controller with default parameters
> + - const: st,stm32f4x9-fsotg
> + description: The DWC2 USB FS/HS controller instance in STM32F4x9 SoCs configured in FS mode
> + - const: st,stm32f4x9-hsotg
> + description: The DWC2 USB HS controller instance in STM32F4x9 SoCs configured in HS mode
> + - const: st,stm32f7-hsotg
> + description: The DWC2 USB HS controller instance in STM32F7 SoCs configured in HS mode
> + - items:
> + - const: samsung,s3c6400-hsotg
> + - const: snps,dwc2
> + minItems: 1
This seems like something to fix in dts files rather than work-around.
Pick whichever one gives fewer errors.
> + description: The DWC2 USB controller instance in the exynos3250 Soc
> +
> + reg:
> + maxItems: 1
> +
> + interrupts:
> + maxItems: 1
> +
> + clocks:
> + maxItems: 1
> +
> + clock-names:
> + items:
> + - const: otg
> +
> + resets:
> + items:
> + - description: common reset
> + - description: ecc reset
> + minItems: 1
> +
> + reset-names:
> + items:
> + - const: dwc2
> + - const: dwc2-ecc
> + minItems: 1
> +
> + phys:
> + $ref: /schemas/types.yaml#/definitions/phandle-array
Standard prop, can drop.
> + description: phy provider specifier
That's all 'phys'. Drop.
> + maxItems: 1
> +
> + phy-names:
> + const: usb2-phy
> +
> + vbus-supply:
> + description: reference to the VBUS regulator. Depending on the current mode
> + this is enabled (in "host" mode") or disabled (in "peripheral" mode). The
> + regulator is updated if the controller is configured in "otg" mode and the
> + status changes between "host" and "peripheral".
> +
> + vusb_d-supply:
> + description: phandle to voltage regulator of digital section,
> +
> + vusb_a-supply:
> + description: phandle to voltage regulator of analog section.
> +
> + dr_mode:
> + enum: [host, peripheral, otg]
> +
> + g-rx-fifo-size:
> + $ref: /schemas/types.yaml#/definitions/uint32
> + description: size of rx fifo size in gadget mode.
> +
> + g-np-tx-fifo-size:
> + $ref: /schemas/types.yaml#/definitions/uint32
> + description: size of non-periodic tx fifo size in gadget mode.
> +
> + g-tx-fifo-size:
> + $ref: /schemas/types.yaml#/definitions/uint32-array
> + description: size of periodic tx fifo per endpoint (except ep0) in gadget mode.
> +
> + snps,need-phy-for-wake:
> + $ref: /schemas/types.yaml#/definitions/flag
> + description: If present indicates that the phy needs to be left on for remote wakeup during suspend.
> +
> + snps,reset-phy-on-wake:
> + $ref: /schemas/types.yaml#/definitions/flag
> + description: If present indicates that we need to reset the PHY when we detect a wakeup.
> + This is due to a hardware errata.
> +
> +required:
> + - compatible
> + - reg
> + - interrupts
> + - clocks
> + - clock-names
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + usb@...c0000 {
> + compatible = "ralink,rt3050-usb, snps,dwc2";
> + reg = <0x101c0000 40000>;
> + interrupts = <18>;
> + clocks = <&usb_otg_ahb_clk>;
> + clock-names = "otg";
> + phys = <&usbphy>;
> + phy-names = "usb2-phy";
> + snps,need-phy-for-wake;
> + };
> +
> +...
> --
> 2.15.0
>
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