linux-kernel - Re: [PATCH v2 01/14] dt-bindings: regulator: Add ROHM BD96802 PMIC

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Message-ID: <20250325-universe-jigsaw-61da10ad3f77@spud>
Date: Tue, 25 Mar 2025 17:23:00 +0000
From: Conor Dooley <conor@...nel.org>
To: Matti Vaittinen <mazziesaccount@...il.com>
Cc: Matti Vaittinen <matti.vaittinen@...rohmeurope.com>,
	Lee Jones <lee@...nel.org>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 01/14] dt-bindings: regulator: Add ROHM BD96802 PMIC

On Mon, Mar 24, 2025 at 10:54:44AM +0200, Matti Vaittinen wrote:
> BD96802Qxx-C is an automotive grade configurable Power Management
> Integrated Circuit supporting Functional Safety features for application
> processors, SoCs and FPGAs. BD96802 is controlled via I2C, provides two
> interrupt lines and has two controllable buck regulators.
> 
> The BD96802 belongs to the family of ROHM Scalable PMICs and is intended
> to be used as a companion PMIC for the BD96801.
> 
> Signed-off-by: Matti Vaittinen <mazziesaccount@...il.com>
> 
> ---
> Revision history:
>  v1 => :
>   - No changes
> ---
>  .../regulator/rohm,bd96802-regulator.yaml     | 44 +++++++++++++++++++
>  1 file changed, 44 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/regulator/rohm,bd96802-regulator.yaml
> 
> diff --git a/Documentation/devicetree/bindings/regulator/rohm,bd96802-regulator.yaml b/Documentation/devicetree/bindings/regulator/rohm,bd96802-regulator.yaml
> new file mode 100644
> index 000000000000..671eaf1096d3
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/regulator/rohm,bd96802-regulator.yaml
> @@ -0,0 +1,44 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/regulator/rohm,bd96802-regulator.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: ROHM BD96802 Power Management Integrated Circuit regulators
> +
> +maintainers:
> +  - Matti Vaittinen <matti.vaittinen@...rohmeurope.com>
> +
> +description:
> +  This module is part of the ROHM BD96802 MFD device. For more details
> +  see Documentation/devicetree/bindings/mfd/rohm,bd96802-pmic.yaml.
> +
> +  The regulator controller is represented as a sub-node of the PMIC node
> +  on the device tree.
> +
> +  Regulator nodes should be named to buck1 and buck2.

Is it really needed to add a new binding for this, rather than including
it in the mfd binding, particularly when this isn't actually a binding
for the regulator but the pattern section applies to the mfd.

> +
> +patternProperties:
> +  "^buck[1-2]$":
> +    type: object
> +    description:
> +      Properties for single BUCK regulator.
> +    $ref: regulator.yaml#
> +
> +    properties:
> +      rohm,initial-voltage-microvolt:
> +        description:
> +          Initial voltage for regulator. Voltage can be tuned +/-150 mV from
> +          this value. NOTE, This can be modified via I2C only when PMIC is in
> +          STBY state.
> +        minimum: 500000
> +        maximum: 3300000
> +
> +      rohm,keep-on-stby:
> +        description:
> +          Keep the regulator powered when PMIC transitions to STBY state.
> +        type: boolean
> +
> +    unevaluatedProperties: false
> +
> +additionalProperties: false
> -- 
> 2.49.0
> 



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