linux-kernel - RE: [PATCH v2 3/4] dt-bindings: phy: renesas: usb3-phy: convert bindings to json-schema

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Date:   Fri, 27 Mar 2020 02:39:35 +0000
From:   Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
CC:     Kishon Vijay Abraham I <kishon@...com>,
        Rob Herring <robh+dt@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>
Subject: RE: [PATCH v2 3/4] dt-bindings: phy: renesas: usb3-phy: convert
 bindings to json-schema

Hi Geert-san,

Thank you for your review!
> From: Geert Uytterhoeven, Sent: Thursday, March 26, 2020 5:53 PM
<snip>
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/phy/renesas,usb3-phy.yaml
> > @@ -0,0 +1,78 @@
> > +# SPDX-License-Identifier: GPL-2.0-only
> 
> In think Rob would prefer
> 
>     # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)

I got it.

> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/phy/renesas,usb3-phy.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Renesas R-Car generation 3 USB 3.0 PHY
> > +
> > +maintainers:
> > +  - Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>
> > +
> > +properties:
> > +  compatible:
> > +    items:
> > +      - enum:
> > +          - renesas,r8a774a1-usb3-phy # RZ/G2M
> > +          - renesas,r8a774b1-usb3-phy # RZ/G2N
> > +          - renesas,r8a7795-usb3-phy  # R-Car H3
> > +          - renesas,r8a7796-usb3-phy  # R-Car M3-W
> > +          - renesas,r8a77965-usb3-phy # R-Car M3-N
> > +      - const: renesas,rcar-gen3-usb3-phy
> > +
> > +  reg:
> > +    # base address and length of the registers block for the PHY.
> 
> I think this comment can be removed.

I think so. So, I'll remove it.

> > +    maxItems: 1
> > +
> > +  clocks:
> > +    # A list of phandles and clock-specifier pairs.
> 
> Likewise.

Yes, I'll remove it.

> "minItems: 2"?

Thank you for pointed it out. Yes, this should have "minItems: 2".

> > +    maxItems: 3
> > +
> > +  clock-names:
> > +    # If you want to use the ssc, the clock-frequency of usb_extal
> > +    # must not be 0.
> 
> "minItems: 2"?

Yes, I'll add it.

> > +    maxItems: 3
> > +    items:
> > +      - const: usb3-if # The funcional clock
> > +      - const: usb3s_clk # The usb3's external clock
> > +      - const: usb_extal # The usb2's external clock
> > +
> > +  '#phy-cells':
> > +    # see phy-bindings.txt in the same directory
> > +    const: 0
> > +
> > +  power-domains:
> > +    maxItems: 1
> > +
> > +  resets:
> > +    maxItems: 1
> > +
> > +  renesas,ssc-range:
> > +    description: |
> > +      Enable/disable spread spectrum clock (ssc). 0 or the property doesn't
> > +      exist means disabliing the ssc.
> 
> disabling

Oops, I'll fix it.

> The actual value will be -<value> ppm.

Yes, that's right. So, I'll add this sentence.

> > +    allOf:
> > +      - $ref: /schemas/types.yaml#/definitions/uint32
> > +      - enum: [ 0, 4003, 4492, 4980 ]
> > +
> > +required:
> > +  - compatible
> > +  - reg
> > +  - clocks
> > +  - clock-names
> > +  - '#phy-cells'
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > +  - |
> > +    #include <dt-bindings/clock/r8a7795-cpg-mssr.h>
> > +    #include <dt-bindings/power/r8a7795-sysc.h>
> > +
> > +    usb-phy@...ee000 {
> > +        compatible = "renesas,r8a7795-usb3-phy", "renesas,rcar-gen3-usb3-phy";
> > +        reg = <0 0xe65ee000 0 0x90>;
> 
> Examples use the default #{address,size}-cells of <1>, so
> 
>     reg = <0xe65ee000 0x90>;

Oh, I didn't know. I'll fix it.

Best regards,
Yoshihiro Shimoda