Re: [RFC PATCH v1 2/6] dt-bindings: phy: rockchip: add rk3328 usb3 phy

Krzysztof Kozlowski
2025-01-16T13:11:27Z

On 15/01/2025 02:26, Peter Geis wrote:
> Add documentation for the usb3 phy as implemented on the rk3328 SoC.
>
> Signed-off-by: Peter Geis <pgwipeout@gmail.com>
> ---
>
> .../bindings/phy/rockchip,inno-usb3phy.yaml | 166 ++++++++++++++++++
> 1 file changed, 166 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/phy/rockchip,inno-usb3phy.yaml
>
> diff --git a/Documentation/devicetree/bindings/phy/rockchip,inno-usb3phy.yaml b/Documentation/devicetree/bindings/phy/rockchip,inno-usb3phy.yaml
> new file mode 100644
> index 000000000000..cde489ca87ab
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/phy/rockchip,inno-usb3phy.yaml
> @@ -0,0 +1,166 @@
> +# SPDX-License-Identifier: GPL-2.0-only

Wrong license.

Please run scripts/checkpatch.pl and fix reported warnings. After that,
run also `scripts/checkpatch.pl --strict` and (probably) fix more
warnings. Some warnings can be ignored, especially from --strict run,
but the code here looks like it needs a fix. Feel free to get in touch
if the warning is not clear.

> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/phy/rockchip,inno-usb3phy.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Rockchip USB 3.0 phy with Innosilicon IP block

> +
> +maintainers:
> + - Heiko Stuebner <heiko@sntech.de>
> +
> +properties:
> + compatible:
> + enum:
> + - rockchip,rk3328-usb3phy

Why is this binding entirely different than existing usb2 phy? Nothing
in common? This looks like made for driver and both - driver and binding
- duplicating a lot.

> +
> + reg:
> + maxItems: 1
> +
> + clocks:
> + minItems: 3

Drop

> + maxItems: 3
> +
> + clock-names:
> + items:
> + - const: refclk-usb3otg

ref

> + - const: usb3phy-otg

otg

> + - const: usb3phy-pipe

pipe

> +
> + interrupts:
> + minItems: 4

You code here randomly. reg has only maxItems, clocks have both and this
have only minItems. Does not make sense. If you get it wrong, I would
assume you repeat the same mistake but here it is like randomly chosen
pieces. And this is making me wonder whether this was not sent too fast.

Anyway: only maxItems.

> +
> + interrupt-names:
> + items:
> + - const: bvalid
> + - const: id
> + - const: linestate
> + - const: rxdet
> +
> + resets:
> + minItems: 6

maxItems instead

> +
> + reset-names:
> + items:
> + - const: usb3phy-u2-por
> + - const: usb3phy-u3-por
> + - const: usb3phy-pipe-mac
> + - const: usb3phy-utmi-mac
> + - const: usb3phy-utmi-apb
> + - const: usb3phy-pipe-apb
> +
> + "#address-cells":
> + const: 2
> +
> + "#size-cells":
> + const: 2
> +
> + ranges: true
> +
> +patternProperties:
> +

Drop blank line

> + utmi-port@[0-9a-f]+$:

This wasn't tested. Missing quotes, missing starting anchor.

> + type: object

Explain what are the children here - description.

> + additionalProperties: false
> +
> + properties:
> + compatible:
> + enum:
> + - rockchip,rk3328-usb3phy-utmi
> +
> + reg:
> + maxItems: 1
> +
> + "#phy-cells":
> + const: 0

Does not look correct. Your parent device is the phy, not child. Why do
you create children per each type of phy?

> +
> + phy-supply:
> + description:
> + Phandle to a regulator that provides power to VBUS.
> + See ./phy-bindings.txt for details.
> +
> + required:
> + - compatible
> + - reg
> + - "#phy-cells"
> +
> + pipe-port@[0-9a-f]+$:
> + type: object
> + additionalProperties: false
> +
> + properties:
> + compatible:
> + enum:
> + - rockchip,rk3328-usb3phy-pipe
> +
> + reg:
> + maxItems: 1
> +
> + "#phy-cells":
> + const: 0
> +
> + phy-supply:
> + description:
> + Phandle to a regulator that provides power to VBUS.
> + See ./phy-bindings.txt for details.

Drop "see ....".

> +
> + required:
> + - compatible
> + - reg
> + - "#phy-cells"
> +
> +required:
> + - compatible
> + - reg
> + - clocks
> + - clock-names
> + - interrupts
> + - interrupt-names
> + - resets
> + - reset-names
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + #include <dt-bindings/clock/rk3328-cru.h>
> + #include <dt-bindings/interrupt-controller/arm-gic.h>
> + #include <dt-bindings/interrupt-controller/irq.h>
> + soc {
> + #address-cells = <2>;
> + #size-cells = <2>;
> +
> + usb3phy: usb3-phy@ff460000 {
> + compatible = "rockchip,rk3328-usb3phy";
> + reg = <0x0 0xff460000 0x0 0x10000>;
> + clocks = <&cru SCLK_REF_USB3OTG>, <&cru PCLK_USB3PHY_OTG>, <&cru PCLK_USB3PHY_PIPE>;

That's way over the limit. Wrapping is at 80.

> + clock-names = "refclk-usb3otg", "usb3phy-otg", "usb3phy-pipe";
> + interrupts = <GIC_SPI 75 IRQ_TYPE_LEVEL_HIGH>, <GIC_SPI 76 IRQ_TYPE_LEVEL_HIGH>,
> + <GIC_SPI 77 IRQ_TYPE_LEVEL_HIGH>, <GIC_SPI 78 IRQ_TYPE_LEVEL_HIGH>;
> + interrupt-names = "bvalid", "id", "linestate", "rxdet";

Best regards,
Krzysztof