linux-kernel - Re: [PATCH v2 2/4] dt-bindings: mfd: spacemit,p1: Add individual regulator supply properties

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Message-ID: <5a1825e3-3517-4d17-aa8f-b0261245d9bb@riscstar.com>
Date: Wed, 28 Jan 2026 07:28:53 -0600
From: Alex Elder <elder@...cstar.com>
To: Guodong Xu <guodong@...cstar.com>, Liam Girdwood <lgirdwood@...il.com>,
 Mark Brown <broonie@...nel.org>, Yixun Lan <dlan@...too.org>,
 Lee Jones <lee@...nel.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Troy Mitchell <troy.mitchell@...ux.spacemit.com>,
 Paul Walmsley <pjw@...nel.org>, Palmer Dabbelt <palmer@...belt.com>,
 Albert Ou <aou@...s.berkeley.edu>, Alexandre Ghiti <alex@...ti.fr>
Cc: linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org,
 spacemit@...ts.linux.dev, devicetree@...r.kernel.org
Subject: Re: [PATCH v2 2/4] dt-bindings: mfd: spacemit,p1: Add individual
 regulator supply properties

On 1/23/26 6:20 PM, Guodong Xu wrote:
> Add supply properties that match the P1 PMIC's actual hardware topology
> where each buck converter has its own VIN pin and LDO groups share
> common input pins. Supply names are defined according to the pinout
> names in the P1 datasheet.
> 
> This allows different boards to describe their actual power tree
> connections in devicetree rather than hardcoding supply relationships
> in the driver.
> 
> Signed-off-by: Guodong Xu <guodong@...cstar.com>

Your additions match what I see in the data sheet.
This looks good, thank you.

Reviewed-by: Alex Elder <elder@...cstar.com>

> ---
> v2: Remove providers from the dts example.
>      Pass the 'make dt_binding_check' test.
> ---
>   .../devicetree/bindings/mfd/spacemit,p1.yaml       | 49 +++++++++++++++++++++-
>   1 file changed, 47 insertions(+), 2 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/mfd/spacemit,p1.yaml b/Documentation/devicetree/bindings/mfd/spacemit,p1.yaml
> index c6593ac6ef6a..c67b1c6e4e4f 100644
> --- a/Documentation/devicetree/bindings/mfd/spacemit,p1.yaml
> +++ b/Documentation/devicetree/bindings/mfd/spacemit,p1.yaml
> @@ -27,8 +27,41 @@ properties:
>     interrupts:
>       maxItems: 1
>   
> -  vin-supply:
> -    description: Input supply phandle.
> +  vin1-supply:
> +    description:
> +      Power supply for BUCK1. Required if BUCK1 is defined.
> +
> +  vin2-supply:
> +    description:
> +      Power supply for BUCK2. Required if BUCK2 is defined.
> +
> +  vin3-supply:
> +    description:
> +      Power supply for BUCK3. Required if BUCK3 is defined.
> +
> +  vin4-supply:
> +    description:
> +      Power supply for BUCK4. Required if BUCK4 is defined.
> +
> +  vin5-supply:
> +    description:
> +      Power supply for BUCK5. Required if BUCK5 is defined.
> +
> +  vin6-supply:
> +    description:
> +      Power supply for BUCK6. Required if BUCK6 is defined.
> +
> +  aldoin-supply:
> +    description:
> +      Power supply for ALDO1-4. Required if any are defined.
> +
> +  dldoin1-supply:
> +    description:
> +      Power supply for DLDO1-4. Required if any are defined.
> +
> +  dldoin2-supply:
> +    description:
> +      Power supply for DLDO5-7. Required if any are defined.
>   
>     regulators:
>       type: object
> @@ -58,6 +91,10 @@ examples:
>               compatible = "spacemit,p1";
>               reg = <0x41>;
>               interrupts = <64>;
> +            vin1-supply = <&reg_vcc_5v>;
> +            vin5-supply = <&reg_vcc_5v>;
> +            aldoin-supply = <&reg_vcc_5v>;
> +            dldoin1-supply = <&buck5>;
>   
>               regulators {
>                   buck1 {
> @@ -68,6 +105,14 @@ examples:
>                       regulator-always-on;
>                   };
>   
> +                buck5: buck5 {
> +                    regulator-name = "buck5";
> +                    regulator-min-microvolt = <500000>;
> +                    regulator-max-microvolt = <3450000>;
> +                    regulator-ramp-delay = <5000>;
> +                    regulator-always-on;
> +                };
> +
>                   aldo1 {
>                       regulator-name = "aldo1";
>                       regulator-min-microvolt = <500000>;
>