linux-kernel - Re: [PATCH v2 2/2] dt-bindings: add bindings for QCOM flash LED

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Date:   Thu, 29 Sep 2022 14:40:05 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Fenglin Wu <quic_fenglinw@...cinc.com>,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Pavel Machek <pavel@....cz>, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-leds@...r.kernel.org, devicetree@...r.kernel.org
Cc:     collinsd@...eaurora.org, subbaram@...eaurora.org
Subject: Re: [PATCH v2 2/2] dt-bindings: add bindings for QCOM flash LED

On 29/09/2022 14:15, Fenglin Wu wrote:
> Add binding document for flash LED module inside Qualcomm Technologies,
> Inc. PMICs.
> 
> Signed-off-by: Fenglin Wu <quic_fenglinw@...cinc.com>

Thank you for your patch. There is something to discuss/improve.

> +  reg:
> +    description: address offset of the flash LED controller
> +    maxItems: 1
> +
> +patternProperties:
> +  "^led[0-3]$":

In such case: ^led-[0-9]$"

> +    type: object
> +    $ref: common.yaml#
> +    unevaluatedProperties: false
> +    description: |
> +      Represents the physical LED components which are connected to the
> +      flash LED channels' output.
> +
> +    properties:
> +      led-sources:
> +        description: |
> +          The HW indices of the flash LED channels that connect to the
> +          physical LED
> +        allOf:
> +          - minItems: 1
> +            maxItems: 2
> +            items:
> +              enum: [1, 2, 3, 4]
> +
> +      led-max-microamp:
> +        description: |
> +          The maximum current value when LED is not operating in flash mode (i.e. torch mode)
> +          Valid values when an LED is connected to one flash LED channel:
> +            5000 - 500000, step by 5000
> +          Valid values when an LED is connected to two flash LED channels:
> +            10000 - 1000000, step by 10000
> +        minimum: 5000
> +        maximum: 1000000
> +
> +      flash-max-microamp:
> +        description: |
> +          The maximum current value when LED is operating in flash mode.
> +          Valid values when an LED is connected to one flash LED channel:
> +            12500 - 1500000, step by 12500
> +          Valid values when an LED is connected to two flash LED channels:
> +            25000 - 2000000, step by 12500
> +        minimum: 12500
> +        maximum: 2000000
> +
> +      flash-max-timeout-us:
> +        description: |
> +          The maximum timeout value when LED is operating in flash mode.
> +          Valid values: 10000 - 1280000, step by 10000
> +        minimum: 10000
> +        maximum: 1280000
> +
> +    required:
> +      - led-sources
> +      - led-max-microamp
> +
> +required:
> +  - compatible
> +  - reg
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/leds/common.h>
> +    spmi_bus {

No underscores in node names, so just "bus"

> +        #address-cells = <1>;
> +        #size-cells = <0>;

Best regards,
Krzysztof