linux-kernel - Re: [PATCH v3 2/2] dt-bindings: pinctrl: intel: Add for new SoC

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Date:   Wed, 6 Nov 2019 18:24:25 +0800
From:   "Tanwar, Rahul" <rahul.tanwar@...ux.intel.com>
To:     Rob Herring <robh@...nel.org>
Cc:     linus.walleij@...aro.org, mark.rutland@....com,
        linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, andriy.shevchenko@...el.com,
        qi-ming.wu@...el.com, yixin.zhu@...ux.intel.com,
        cheol.yong.kim@...el.com
Subject: Re: [PATCH v3 2/2] dt-bindings: pinctrl: intel: Add for new SoC


Hi Rob,

Thanks for the feedback.

On 6/11/2019 5:29 AM, Rob Herring wrote:
>> +      bias-pull-up:
>> +        $ref: /schemas/types.yaml#/definitions/uint32
>> +        description: Specifies pull-up configuration.
> Isn't this boolean?
>
>> +
>> +      bias-pull-down:
>> +        $ref: /schemas/types.yaml#/definitions/uint32
>> +        description: Specifies pull-down configuration.
> And this?
>
> Though looks like sometimes it has a value? Pull strength I guess.
>
>> +
>> +      drive-strength:
>> +        $ref: /schemas/types.yaml#/definitions/uint32
>> +        description: Enables driver-current.
>> +
>> +      slew-rate:
>> +        $ref: /schemas/types.yaml#/definitions/uint32
>> +        description: Enables slew-rate.
>> +
>> +      drive-open-drain:
>> +        $ref: /schemas/types.yaml#/definitions/uint32
>> +        description: Specifies open-drain configuration.
> boolean?
>
>> +
>> +      output-enable:
>> +        $ref: /schemas/types.yaml#/definitions/uint32
>> +        description: Specifies if the pin is to be configured as output.
> boolean?
>
> But really, all of these should have a common schema defining the types 
> and only put any additional constraints here.

Yes, you are right. These are all boolean types.
All these are standard properties & we are using them with no
additional constraintsi.e conforming to how they are already
documented in pinctrl-bindings.txt. Shall ijust omit documenting
these properties here in driver bindings ?

>> +
>> +examples:
>> +  # Pinmux controller node
>> +  - |
>> +    pinctrl: pinctrl@...80000 {
>> +          compatible = "intel,lgm-pinctrl";
>> +          reg = <0xe2880000 0x100000>;
>> +
>> +          # Client device subnode
>> +          uart0:uart0 {
> space              ^

Just to be sure, you mean space misalignment at below
line <65>; /* UART_TX0 */ ?Or is it something else ?

>> +                pins = <64>, /* UART_RX0 */
>> +                             <65>; /* UART_TX0 */
>> +                function = "CONSOLE_UART0";
>> +                pinmux = <1>,
>> +                         <1>;
>> +                groups = "CONSOLE_UART0";
>> +          };
>> +    };
>> +
>> +...
>> -- 
>> 2.11.0
>>
Regards,
Rahul