linux-kernel - Re: [PATCH v9 03/15] dt-bindings: usb: Maxim type-c controller device tree binding document

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Message-ID: <CAPTae5+e74k22Vcf-cnFLFGnR-mBdb9qvN6i-E-31VexhpUSeA@mail.gmail.com>
Date:   Wed, 7 Oct 2020 17:42:57 -0700
From:   Badhri Jagan Sridharan <badhri@...gle.com>
To:     Rob Herring <robh@...nel.org>
Cc:     Guenter Roeck <linux@...ck-us.net>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Lee Jones <lee.jones@...aro.org>,
        Mark Brown <broonie@...nel.org>,
        Maxime Ripard <mripard@...nel.org>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Thierry Reding <treding@...dia.com>,
        Prashant Malani <pmalani@...omium.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>, LKML <linux-kernel@...r.kernel.org>,
        USB <linux-usb@...r.kernel.org>
Subject: Re: [PATCH v9 03/15] dt-bindings: usb: Maxim type-c controller device
 tree binding document

Hi Robb,

Thanks for the reviews ! Responses inline.

Regards,
Badhri

On Mon, Oct 5, 2020 at 7:46 AM Rob Herring <robh@...nel.org> wrote:
>
> On Mon, Sep 28, 2020 at 07:39:52PM -0700, Badhri Jagan Sridharan wrote:
> > Add device tree binding document for Maxim TCPCI based Type-C chip driver
> >
> > Signed-off-by: Badhri Jagan Sridharan <badhri@...gle.com>
> > ---
> > Changes since v1:
> > - Changing patch version to v6 to fix version number confusion.
> >
> > Changes since v6:
> > - Migrated to yaml format.
> >
> > Changes since v7:
> > - Rebase on usb-next
> >
> > Changes since v8:
> > - Fix errors from make dt_binding_check as suggested by
> >   Rob Herring.
> > ---
> >  .../devicetree/bindings/usb/maxim,tcpci.yaml  | 68 +++++++++++++++++++
> >  1 file changed, 68 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/usb/maxim,tcpci.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/usb/maxim,tcpci.yaml b/Documentation/devicetree/bindings/usb/maxim,tcpci.yaml
> > new file mode 100644
> > index 000000000000..f4b5f1a09b98
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/usb/maxim,tcpci.yaml
> > @@ -0,0 +1,68 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: "http://devicetree.org/schemas/usb/maxim,tcpci.yaml#"
> > +$schema: "http://devicetree.org/meta-schemas/core.yaml#"
> > +
> > +title: Maxim TCPCI Type-C PD controller DT bindings
> > +
> > +maintainers:
> > +  - Badhri Jagan Sridharan <badhri@...gle.com>
> > +
> > +description: Maxim TCPCI Type-C PD controller
> > +
> > +properties:
> > +  compatible:
> > +    enum:
> > +      - maxim,tcpci
>
> Is there a datasheet for this? Searching for 'tcpci' doesn't really come
> up with anything other than this patch. Only chip I found is MAX77958.
> Bindings are for specific h/w devices.

Unfortunately the datasheet cannot be made public yet. Has the datasheet
have to be made public before sending the bindings ?

>
> > +
> > +  interrupts:
> > +    maxItems: 1
> > +
> > +  connector:
> > +    type: object
> > +    $ref: ../connector/usb-connector.yaml#
> > +    description:
> > +      Properties for usb c connector.
> > +
> > +required:
> > +  - compatible
> > +  - reg
> > +  - interrupts
>
> additionalProperties: false

ACK. Adding to the next version of the patch.

>
> > +
> > +examples:
> > +  - |
> > +    #include <dt-bindings/interrupt-controller/irq.h>
> > +    #include <dt-bindings/usb/pd.h>
> > +    i2c0 {
> > +        #address-cells = <1>;
> > +        #size-cells = <0>;
> > +
> > +        maxtcpc@25 {
> > +            compatible = "maxim,tcpc";
> > +            reg = <0x25>;
> > +            interrupt-parent = <&gpa8>;
> > +            interrupts = <2 IRQ_TYPE_LEVEL_LOW>;
> > +
> > +            connector {
> > +                compatible = "usb-c-connector";
> > +                label = "USB-C";
> > +                data-role = "dual";
> > +                power-role = "dual";
> > +                try-power-role = "sink";
> > +                self-powered;
> > +                op-sink-microwatt = <2600000>;
> > +                source-pdos = <PDO_FIXED(5000, 900,
> > +                                         PDO_FIXED_SUSPEND |
> > +                                         PDO_FIXED_USB_COMM |
> > +                                         PDO_FIXED_DATA_SWAP |
> > +                                         PDO_FIXED_DUAL_ROLE)>;
> > +                sink-pdos = <PDO_FIXED(5000, 3000,
> > +                                       PDO_FIXED_USB_COMM |
> > +                                       PDO_FIXED_DATA_SWAP |
> > +                                       PDO_FIXED_DUAL_ROLE)
> > +                                       PDO_FIXED(9000, 2000, 0)>;
> > +            };
> > +        };
> > +    };
> > +...
> > --
> > 2.28.0.709.gb0816b6eb0-goog
> >