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Date:   Fri, 25 Dec 2020 09:44:44 +0800
From:   Chunfeng Yun <chunfeng.yun@...iatek.com>
To:     Rob Herring <robh@...nel.org>
CC:     Chun-Kuang Hu <chunkuang.hu@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Kishon Vijay Abraham I <kishon@...com>,
        Vinod Koul <vkoul@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        "Greg Kroah-Hartman" <gregkh@...uxfoundation.org>,
        Stanley Chu <stanley.chu@...iatek.com>,
        Min Guo <min.guo@...iatek.com>,
        <dri-devel@...ts.freedesktop.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>, <linux-usb@...r.kernel.org>,
        Serge Semin <Sergey.Semin@...kalelectronics.ru>
Subject: Re: [PATCH v4 10/11] dt-bindings: usb: convert mediatek,mtu3.txt to
 YAML schema

On Mon, 2020-12-21 at 12:26 -0700, Rob Herring wrote:
> On Wed, Dec 16, 2020 at 05:30:11PM +0800, Chunfeng Yun wrote:
> > Convert mediatek,mtu3.txt to YAML schema mediatek,mtu3.yaml
> > 
> > Signed-off-by: Chunfeng Yun <chunfeng.yun@...iatek.com>
> > ---
> > v4:
> >   1. refer to usb-drd.yaml insstead of usb/generic.txt
> >   the following ones suggested by Rob:
> >   2. add the number of phys supported
> >   3. fix indentation of wakeup
> >   4. add examples for port and connector
> > 
> > v3:
> >   1. fix yamllint warning
> >   2. remove pinctrl* properties
> >   3. remove unnecessary '|'
> >   4. drop unused labels in example
> > 
> > v2: new patch
> > ---
> >  .../devicetree/bindings/usb/mediatek,mtu3.txt | 108 -------
> >  .../bindings/usb/mediatek,mtu3.yaml           | 278 ++++++++++++++++++
> >  2 files changed, 278 insertions(+), 108 deletions(-)
> >  delete mode 100644 Documentation/devicetree/bindings/usb/mediatek,mtu3.txt
> >  create mode 100644 Documentation/devicetree/bindings/usb/mediatek,mtu3.yaml
> > 
[...]
> > +
> > +  power-domains:
> > +    description: A phandle to USB power domain node to control USB's MTCMOS
> > +    maxItems: 1
> > +
> > +  clocks:
> > +    minItems: 1
> > +    maxItems: 4
> 
> Don't need maxItems here.
Ok, will remove it, and apply others
> 
> > +    items:
> > +      - description: Controller clock used by normal mode
> > +      - description: Reference clock used by low power mode etc
> > +      - description: Mcu bus clock for register access
> > +      - description: DMA bus clock for data transfer
> > +
> > +  clock-names:
> > +    minItems: 1
> > +    maxItems: 4
> > +    items:
> > +      - const: sys_ck  # required, the following ones are optional
> > +      - const: ref_ck
> > +      - const: mcu_ck
> > +      - const: dma_ck
> > +
> > +  phys:
> > +    description: List of all the USB PHYs used
> > +    minItems: 0
> > +    maxItems: 9
> 
> Need to define what each one is.
Ok, will do it
> 
> > +
> > +  vusb33-supply:
> > +    description: Regulator of USB AVDD3.3v
> > +
> > +  vbus-supply:
> > +    deprecated: true
> > +    description: |
> > +      Regulator of USB VBUS5v, needed when supports dual-role mode.
> > +      Particularly, if use an output GPIO to control a VBUS regulator, should
> > +      model it as a regulator. See bindings/regulator/fixed-regulator.yaml
> > +      It's considered valid for compatibility reasons, not allowed for
> > +      new bindings, and put into a usb-connector node.
> > +
> > +  dr_mode:
> > +    enum: [host, peripheral, otg]
> > +    default: otg
> > +
> > +  maximum-speed:
> > +    enum: [super-speed-plus, super-speed, high-speed, full-speed]
> > +
> > +  "#address-cells":
> > +    enum: [1, 2]
> > +
> > +  "#size-cells":
> > +    enum: [1, 2]
> > +
> > +  ranges: true
> > +
> > +  extcon:
> > +    deprecated: true
> > +    description: |
> > +      Phandle to the extcon device detecting the IDDIG/VBUS state, neede
> > +      when supports dual-role mode.
> > +      It's considered valid for compatibility reasons, not allowed for
> > +      new bindings, and use "usb-role-switch" property instead.
> > +
> > +  usb-role-switch:
> > +    $ref: /schemas/types.yaml#/definitions/flag
> > +    description: Support role switch.
> > +    type: boolean
> > +
> > +  connector:
> > +    $ref: /connector/usb-connector.yaml#
> > +    description:
> > +      Connector for dual role switch, especially for "gpio-usb-b-connector"
> > +    type: object
> > +
> > +  port:
> > +    description:
> > +      Any connector to the data bus of this controller should be modelled
> > +      using the OF graph bindings specified, if the "usb-role-switch"
> > +      property is used. See graph.txt
> > +    type: object
> > +
> > +  enable-manual-drd:
> > +    $ref: /schemas/types.yaml#/definitions/flag
> > +    description:
> > +      supports manual dual-role switch via debugfs; usually used when
> > +      receptacle is TYPE-A and also wants to support dual-role mode.
> > +    type: boolean
> > +
> > +  wakeup-source:
> > +    description: enable USB remote wakeup, see power/wakeup-source.txt
> > +    type: boolean
> > +
> > +  mediatek,syscon-wakeup:
> > +    $ref: /schemas/types.yaml#/definitions/phandle-array
> > +    maxItems: 1
> > +    description:
> > +      A phandle to syscon used to access the register of the USB wakeup glue
> > +      layer between xHCI and SPM, the field should always be 3 cells long.
> > +    items:
> > +      items:
> > +        - description:
> > +            The first cell represents a phandle to syscon
> > +        - description:
> > +            The second cell represents the register base address of the glue
> > +            layer in syscon
> > +        - description:
> > +            The third cell represents the hardware version of the glue layer,
> > +            1 is used by mt8173 etc, 2 is used by mt2712 etc
> > +          enum: [1, 2]
> > +
> > +  mediatek,u3p-dis-msk:
> > +    $ref: /schemas/types.yaml#/definitions/uint32
> > +    description: The mask to disable u3ports, bit0 for u3port0,
> > +      bit1 for u3port1, ... etc
> > +
> > +# Required child node when support dual-role
> > +patternProperties:
> > +  "^usb@[0-9a-f]+$":
> > +    type: object
> > +    $ref: /usb/mediatek,mtk-xhci.yaml#
> > +    description:
> > +      The xhci should be added as subnode to mtu3 as shown in the following
> > +      example if the host mode is enabled.
> > +
> > +dependencies:
> > +  connector: [ 'usb-role-switch' ]
> > +  port: [ 'usb-role-switch' ]
> > +  wakeup-source: [ 'mediatek,syscon-wakeup' ]
> > +
> > +required:
> > +  - compatible
> > +  - reg
> > +  - reg-names
> > +  - interrupts
> > +  - clocks
> > +  - clock-names
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > +  # Dual role switch by extcon
> > +  - |
> > +    #include <dt-bindings/clock/mt8173-clk.h>
> > +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> > +    #include <dt-bindings/interrupt-controller/irq.h>
> > +    #include <dt-bindings/phy/phy.h>
> > +    #include <dt-bindings/power/mt8173-power.h>
> > +
> > +    usb@...71000 {
> > +        compatible = "mediatek,mt8173-mtu3", "mediatek,mtu3";
> > +        reg = <0x11271000 0x3000>, <0x11280700 0x0100>;
> > +        reg-names = "mac", "ippc";
> > +        interrupts = <GIC_SPI 64 IRQ_TYPE_LEVEL_LOW>;
> > +        phys = <&phy_port0 PHY_TYPE_USB3>, <&phy_port1 PHY_TYPE_USB2>;
> > +        power-domains = <&scpsys MT8173_POWER_DOMAIN_USB>;
> > +        clocks = <&topckgen CLK_TOP_USB30_SEL>;
> > +        clock-names = "sys_ck";
> > +        vusb33-supply = <&mt6397_vusb_reg>;
> > +        vbus-supply = <&usb_p0_vbus>;
> > +        extcon = <&extcon_usb>;
> > +        dr_mode = "otg";
> > +        wakeup-source;
> > +        mediatek,syscon-wakeup = <&pericfg 0x400 1>;
> > +        #address-cells = <1>;
> > +        #size-cells = <1>;
> > +        ranges;
> > +
> > +        xhci: usb@...70000 {
> > +            compatible = "mediatek,mt8173-xhci", "mediatek,mtk-xhci";
> > +            reg = <0x11270000 0x1000>;
> > +            reg-names = "mac";
> > +            interrupts = <GIC_SPI 115 IRQ_TYPE_LEVEL_LOW>;
> > +            power-domains = <&scpsys MT8173_POWER_DOMAIN_USB>;
> > +            clocks = <&topckgen CLK_TOP_USB30_SEL>, <&clk26m>;
> > +            clock-names = "sys_ck", "ref_ck";
> > +            vusb33-supply = <&mt6397_vusb_reg>;
> > +        };
> > +    };
> > +
> > +  # Enable/disable device by an input gpio for VBUS pin
> > +  - |
> > +    #include <dt-bindings/gpio/gpio.h>
> > +    #include <dt-bindings/power/mt2712-power.h>
> > +
> > +    usb@...c1000 {
> > +        compatible = "mediatek,mt2712-mtu3", "mediatek,mtu3";
> > +        reg = <0x112c1000 0x3000>, <0x112d0700 0x0100>;
> > +        reg-names = "mac", "ippc";
> > +        interrupts = <GIC_SPI 248 IRQ_TYPE_LEVEL_LOW>;
> > +        phys = <&u2port2 PHY_TYPE_USB2>;
> > +        power-domains = <&scpsys MT2712_POWER_DOMAIN_USB2>;
> > +        clocks = <&topckgen CLK_TOP_USB30_SEL>;
> > +        clock-names = "sys_ck";
> > +        dr_mode = "peripheral";
> > +        usb-role-switch;
> > +
> > +        connector {
> > +            compatible = "gpio-usb-b-connector", "usb-b-connector";
> > +            type = "micro";
> > +            vbus-gpios = <&pio 13 GPIO_ACTIVE_HIGH>;
> > +        };
> > +    };
> > +
> > +  # Dual role switch with type-c
> > +  - |
> > +    usb@...01000 {
> > +        compatible ="mediatek,mt8183-mtu3", "mediatek,mtu3";
> > +        reg = <0x11201000 0x2e00>, <0x11203e00 0x0100>;
> > +        reg-names = "mac", "ippc";
> > +        interrupts = <GIC_SPI 72 IRQ_TYPE_LEVEL_LOW>;
> > +        phys = <&u2port0 PHY_TYPE_USB2>;
> > +        clocks = <&clk26m>;
> > +        clock-names = "sys_ck";
> > +        mediatek,syscon-wakeup = <&pericfg 0x400 1>;
> > +        wakeup-source;
> > +        dr_mode = "otg";
> > +        usb-role-switch;
> > +        #address-cells = <1>;
> > +        #size-cells = <1>;
> > +        ranges;
> > +
> > +        host: usb@...00000 {
> > +            compatible = "mediatek,mt8183-xhci", "mediatek,mtk-xhci";
> > +            reg = <0x11200000 0x1000>;
> > +            reg-names = "mac";
> > +            interrupts = <GIC_SPI 73 IRQ_TYPE_LEVEL_LOW>;
> > +            clocks = <&clk26m>;
> > +            clock-names = "sys_ck";
> > +        };
> > +
> > +        port {
> > +            usb_role_sw: endpoint {
> > +                remote-endpoint = <&hs_ep>;
> > +            };
> > +        };
> > +    };
> > +
> > +...
> > -- 
> > 2.18.0
> > 

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