linux-kernel - Re: [PATCH 2/3] dt-bindings: regulator: Add regulator-output binding

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Date:   Thu, 29 Sep 2022 16:07:14 -0500
From:   Rob Herring <robh@...nel.org>
To:     Zev Weiss <zev@...ilderbeest.net>
Cc:     Mark Brown <broonie@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Naresh Solanki <naresh.solanki@...ements.com>,
        Patrick Rudolph <patrick.rudolph@...ements.com>,
        Laxman Dewangan <ldewangan@...dia.com>,
        openbmc@...ts.ozlabs.org
Subject: Re: [PATCH 2/3] dt-bindings: regulator: Add regulator-output binding

On Sun, Sep 25, 2022 at 03:03:18PM -0700, Zev Weiss wrote:
> This describes a power output supplied by a regulator, such as a
> power outlet on a power distribution unit (PDU).
> 
> Signed-off-by: Zev Weiss <zev@...ilderbeest.net>
> ---
>  .../bindings/regulator/regulator-output.yaml  | 47 +++++++++++++++++++
>  1 file changed, 47 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/regulator/regulator-output.yaml
> 
> diff --git a/Documentation/devicetree/bindings/regulator/regulator-output.yaml b/Documentation/devicetree/bindings/regulator/regulator-output.yaml
> new file mode 100644
> index 000000000000..40953ec48e9e
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/regulator/regulator-output.yaml
> @@ -0,0 +1,47 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +
> +$id: http://devicetree.org/schemas/regulator/regulator-output.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Regulator output connector
> +
> +maintainers:
> +  - Zev Weiss <zev@...ilderbeest.net>
> +
> +description: |
> +  This describes a power output connector supplied by a regulator,
> +  such as a power outlet on a power distribution unit (PDU).  The
> +  connector may be standalone or merely one channel or set of pins
> +  within a ganged physical connector carrying multiple independent
> +  power outputs.
> +
> +properties:
> +  compatible:
> +    const: regulator-output
> +
> +  vout-supply:
> +    description:
> +      Phandle of the regulator supplying the output.
> +
> +  regulator-leave-on:
> +    description: |
> +      If the regulator is enabled when software relinquishes control
> +      of it (such as when shutting down) it should be left enabled
> +      instead of being turned off.
> +    type: boolean

I'm not too sure about this one as there could be various times when 
control is relinquished. It is userspace closing its access? 
driver unbind? module unload? Does a bootloader pay attention to this?

Rob