linux-kernel - Re: [RESEND PATCH 12/19] dt-bindings: Add bindings for USB phy on Allwinner A100

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Message-ID: <20201111225039.GA2185181@bogus>
Date:   Wed, 11 Nov 2020 16:50:39 -0600
From:   Rob Herring <robh@...nel.org>
To:     Frank Lee <frank@...winnertech.com>
Cc:     tiny.windzz@...il.com, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Kishon Vijay Abraham I <kishon@...com>,
        Vinod Koul <vkoul@...nel.org>,
        Maxime Ripard <mripard@...nel.org>,
        Chen-Yu Tsai <wens@...e.org>
Subject: Re: [RESEND PATCH 12/19] dt-bindings: Add bindings for USB phy on
 Allwinner A100

On Tue, Nov 10, 2020 at 02:39:42PM +0800, Frank Lee wrote:
> From: Yangtao Li <frank@...winnertech.com>
> 
> Add a device tree binding for the A100's USB PHY.
> 
> Signed-off-by: Yangtao Li <frank@...winnertech.com>
> ---
>  .../phy/allwinner,sun50i-a100-usb-phy.yaml    | 105 ++++++++++++++++++
>  1 file changed, 105 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/phy/allwinner,sun50i-a100-usb-phy.yaml
> 
> diff --git a/Documentation/devicetree/bindings/phy/allwinner,sun50i-a100-usb-phy.yaml b/Documentation/devicetree/bindings/phy/allwinner,sun50i-a100-usb-phy.yaml
> new file mode 100644
> index 000000000000..cc9bbebe2bd7
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/phy/allwinner,sun50i-a100-usb-phy.yaml
> @@ -0,0 +1,105 @@
> +# SPDX-License-Identifier: GPL-2.0

Dual license new bindings. checkpatch.pl will tell you which ones.

> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/phy/allwinner,sun50i-a100-usb-phy.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Allwinner A100 USB PHY Device Tree Bindings
> +
> +maintainers:
> +  - Yangtao Li <tiny.windzz@...il.com>
> +
> +properties:
> +  "#phy-cells":
> +    const: 1
> +
> +  compatible:
> +    const: allwinner,sun50i-a100-usb-phy
> +
> +  reg:
> +    items:
> +      - description: PHY Control registers
> +      - description: PHY PMU0 registers
> +      - description: PHY PMU1 registers
> +
> +  reg-names:
> +    items:
> +      - const: phy_ctrl
> +      - const: pmu0
> +      - const: pmu1
> +
> +  clocks:
> +    items:
> +      - description: USB OTG PHY bus clock
> +      - description: USB Host 0 PHY bus clock
> +
> +  clock-names:
> +    items:
> +      - const: usb0_phy
> +      - const: usb1_phy
> +
> +  resets:
> +    items:
> +      - description: USB OTG reset
> +      - description: USB Host 1 Controller reset
> +
> +  reset-names:
> +    items:
> +      - const: usb0_reset
> +      - const: usb1_reset
> +
> +  usb0_id_det-gpios:
> +    description: GPIO to the USB OTG ID pin

Needs 'maxItems: 1'

> +
> +  usb0_vbus_det-gpios:
> +    description: GPIO to the USB OTG VBUS detect pin
> +
> +  usb0_vbus_power-supply:
> +    description: Power supply to detect the USB OTG VBUS
> +
> +  usb0_vbus-supply:
> +    description: Regulator controlling USB OTG VBUS
> +
> +  usb1_vbus-supply:
> +    description: Regulator controlling USB1 Host controller

Are ID and VBus actually connected to the phy h/w? Really, all this 
should be in a USB connector node for which we have bindings.

> +
> +required:
> +  - "#phy-cells"
> +  - compatible
> +  - clocks
> +  - clock-names
> +  - reg
> +  - reg-names
> +  - resets
> +  - reset-names
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/gpio/gpio.h>
> +    #include <dt-bindings/clock/sun50i-a100-ccu.h>
> +    #include <dt-bindings/reset/sun50i-a100-ccu.h>
> +
> +    phy@...0400 {
> +        #phy-cells = <1>;
> +        compatible = "allwinner,sun50i-a100-usb-phy";
> +        reg = <0x05100400 0x14>,
> +              <0x05101800 0x4>,
> +              <0x05200800 0x4>;
> +        reg-names = "phy_ctrl",
> +                    "pmu0",
> +                    "pmu1";
> +        clocks = <&ccu CLK_USB_PHY0>,
> +                 <&ccu CLK_USB_PHY1>;
> +        clock-names = "usb0_phy",
> +                      "usb1_phy";
> +        resets = <&ccu RST_USB_PHY0>,
> +                 <&ccu RST_USB_PHY1>;
> +        reset-names = "usb0_reset",
> +                      "usb1_reset";
> +        usb0_id_det-gpios = <&pio 7 10 GPIO_ACTIVE_HIGH>; /* PH10 */
> +        usb0_vbus_power-supply = <&usb_power_supply>;
> +        usb0_vbus-supply = <&reg_drivevbus>;
> +        usb1_vbus-supply = <&reg_usb1_vbus>;
> +    };
> -- 
> 2.28.0
>