linux-kernel - Re: [PATCH v2 1/2] dt-bindings: reset: Document RZ/V2H(P) USB2PHY Control

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Message-ID: <CA+V-a8uQTL+SHYqVU_J0th4PT6YPF7q6ypzDu33nS_6onWLoOQ@mail.gmail.com>
Date: Wed, 5 Mar 2025 21:35:13 +0000
From: "Lad, Prabhakar" <prabhakar.csengg@...il.com>
To: Conor Dooley <conor@...nel.org>
Cc: Philipp Zabel <p.zabel@...gutronix.de>, Geert Uytterhoeven <geert+renesas@...der.be>, 
	Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	Magnus Damm <magnus.damm@...il.com>, devicetree@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-renesas-soc@...r.kernel.org, 
	Biju Das <biju.das.jz@...renesas.com>, 
	Fabrizio Castro <fabrizio.castro.jz@...esas.com>, 
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: Re: [PATCH v2 1/2] dt-bindings: reset: Document RZ/V2H(P) USB2PHY Control

Hi Conor,

Thank you for the review.

On Wed, Mar 5, 2025 at 4:26 PM Conor Dooley <conor@...nel.org> wrote:
>
> On Wed, Mar 05, 2025 at 12:39:13PM +0000, Prabhakar wrote:
> > From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> >
> > Add device tree binding document for the Renesas RZ/V2H(P) USB2PHY Control
> > Device. It mainly controls reset and power down of the USB2.0 PHY (for
> > both host and function).
> >
> > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> > ---
> >  .../reset/renesas,rzv2h-usb2phy-ctrl.yaml     | 56 +++++++++++++++++++
> >  1 file changed, 56 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/reset/renesas,rzv2h-usb2phy-ctrl.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/reset/renesas,rzv2h-usb2phy-ctrl.yaml b/Documentation/devicetree/bindings/reset/renesas,rzv2h-usb2phy-ctrl.yaml
> > new file mode 100644
> > index 000000000000..ed156a1d3eb3
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/reset/renesas,rzv2h-usb2phy-ctrl.yaml
> > @@ -0,0 +1,56 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/reset/renesas,rzv2h-usb2phy-ctrl.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Renesas RZ/V2H(P) USB2PHY Control
> > +
> > +maintainers:
> > +  - Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> > +
> > +description:
> > +  The RZ/V2H(P) USB2PHY Control mainly controls reset and power down of the
> > +  USB2.0 PHY.
> > +
> > +properties:
> > +  compatible:
> > +    const: renesas,r9a09g057-usb2phy-ctrl  # RZ/V2H(P)
> > +
> > +  reg:
> > +    maxItems: 1
> > +
> > +  clocks:
> > +    maxItems: 1
> > +
> > +  resets:
> > +    maxItems: 1
> > +
> > +  power-domains:
> > +    maxItems: 1
> > +
> > +  '#reset-cells':
> > +    const: 0
> > +
> > +required:
> > +  - compatible
> > +  - reg
> > +  - clocks
> > +  - resets
> > +  - power-domains
> > +  - '#reset-cells'
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > +  - |
> > +    #include <dt-bindings/clock/renesas,r9a09g057-cpg.h>
> > +
> > +    usbphy-ctrl@...30000 {
>
> How come your nodename isn't "reset-controller"?
This is to keep consistency with the other similar IP blocks found on
Renesas SoCs [0].

[0] https://elixir.bootlin.com/linux/v6.14-rc5/source/Documentation/devicetree/bindings/reset/renesas,rzg2l-usbphy-ctrl.yaml#L66

> Otherwise,
> Acked-by: Conor Dooley <conor.dooley@...rochip.com>
>
> > +        compatible = "renesas,r9a09g057-usb2phy-ctrl";
> > +        reg = <0x15830000 0x10000>;
> > +        clocks = <&cpg CPG_MOD 0xb6>;
> > +        resets = <&cpg 0xaf>;
> > +        power-domains = <&cpg>;
> > +        #reset-cells = <0>;
> > +    };
> > --
> > 2.43.0
> >

Cheers,
Prabhakar