linux-kernel - Re: [PATCH 1/2] dt-bindings: power: supply: Add Lenovo Yoga C630 EC

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Message-ID: <YvQIA5Xnp1LaIIUf@ripper>
Date:   Wed, 10 Aug 2022 12:33:23 -0700
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Sebastian Reichel <sre@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-pm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH 1/2] dt-bindings: power: supply: Add Lenovo Yoga C630 EC

On Wed 10 Aug 06:35 PDT 2022, Krzysztof Kozlowski wrote:

> On 10/08/2022 06:04, Bjorn Andersson wrote:
> > Add binding for the Embedded Controller found in the Qualcomm
> > Snapdragon-based Lenovo Yoga C630.
> 
> Thank you for your patch. There is something to discuss/improve.
> 
> > +
> > +description:
> > +  The Qualcomm Snapdragon-based Lenovo Yoga C630 has an Embedded Controller
> > +  (EC) which handles things such as battery and USB Type-C. This binding
> > +  describes the interface, on an I2C bus, to this EC.
> > +
> > +properties:
> > +  compatible:
> > +    const: lenovo,yoga-c630-ec
> > +
> > +  reg:
> > +    const: 0x70
> > +
> > +  '#address-cells':
> > +    const: 1
> 
> Just to clarify: the EC have physically two USB connectors?
> 

Correct, while it's only possible to do Displayport on the second
connector, the EC is involved in both the connectors - based on the
events received from it.

> > +
> > +  '#size-cells':
> > +    const: 0
> > +
> > +  interrupts:
> > +    maxItems: 1
> > +
> > +patternProperties:
> > +  '^connector@\d$':
> > +    $ref: /schemas/connector/usb-connector.yaml#
> 
> unevaluatedProperties:false inside connector (on its level)
> 

Okay, will update accordingly.

> > +
> > +required:
> > +  - compatible
> > +  - reg
> > +  - interrupts
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > +  - |+
> > +    #include <dt-bindings/interrupt-controller/irq.h>
> > +    i2c1 {
> > +      clock-frequency = <400000>;
> > +
> > +      #address-cells = <1>;
> > +      #size-cells = <0>;
> > +
> > +      embedded-controller@70 {
> > +        compatible = "lenovo,yoga-c630-ec";
> > +        reg = <0x70>;
> > +
> > +        interrupts-extended = <&tlmm 20 IRQ_TYPE_LEVEL_HIGH>;
> > +
> > +        #address-cells = <1>;
> > +        #size-cells = <0>;
> > +
> > +        connector@0 {
> > +          compatible = "usb-c-connector";
> > +          reg = <0>;
> > +          power-role = "source";
> > +          data-role = "host";
> > +        };
> > +
> > +        connector@1 {
> > +          compatible = "usb-c-connector";
> > +          reg = <1>;
> > +          power-role = "source";
> > +          data-role = "host";
> > +
> > +          ports {
> > +            #address-cells = <1>;
> > +            #size-cells = <0>;
> > +            port@1 {
> > +              reg = <1>;
> > +              lenovo_ec_dp_in: endpoint {
> > +                   remote-endpoint = <&mdss_dp_out>;
> 
> You have inconsistent indentation. Use 4-spaces for entire DTS example.
> 

Odd, will fix.

Thanks,
Bjorn

> Best regards,
> Krzysztof