linux-kernel - Re: [PATCH v4 1/2] dt-bindings: power: supply: Document Maxim MAX8971 charger

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Message-ID: <20250311193732.GA4183071-robh@kernel.org>
Date: Tue, 11 Mar 2025 14:37:32 -0500
From: Rob Herring <robh@...nel.org>
To: Svyatoslav Ryhel <clamor95@...il.com>
Cc: Sebastian Reichel <sre@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, linux-pm@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 1/2] dt-bindings: power: supply: Document Maxim
 MAX8971 charger

On Mon, Mar 10, 2025 at 10:02:36AM +0200, Svyatoslav Ryhel wrote:
> Add bindings for Maxim MAX8971 charger.
> 
> Signed-off-by: Svyatoslav Ryhel <clamor95@...il.com>
> ---
>  .../bindings/power/supply/maxim,max8971.yaml  | 64 +++++++++++++++++++
>  1 file changed, 64 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/power/supply/maxim,max8971.yaml
> 
> diff --git a/Documentation/devicetree/bindings/power/supply/maxim,max8971.yaml b/Documentation/devicetree/bindings/power/supply/maxim,max8971.yaml
> new file mode 100644
> index 000000000000..d7b3e6ff6906
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/power/supply/maxim,max8971.yaml
> @@ -0,0 +1,64 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/power/supply/maxim,max8971.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Maxim MAX8971 IC charger
> +
> +maintainers:
> +  - Svyatoslav Ryhel <clamor95@...il.com>
> +
> +description:
> +  The MAX8971 is a compact, high-frequency, high-efficiency switch-mode charger
> +  for a one-cell lithium-ion (Li+) battery.
> +
> +allOf:
> +  - $ref: power-supply.yaml#
> +
> +properties:
> +  compatible:
> +    const: maxim,max8971
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  monitored-battery: true
> +
> +  maxim,usb-connector:

Just 'connector', so when we have a 3rd case, we don't have a 3rd 
vendor.

> +    description:
> +      Phandle to a USB connector according to usb-connector.yaml. The connector
> +      should be a child of the extcon device.

'extcon' is a Linuxism. Is there an actual requirement here that's not 
*current* Linux requirements (which could change)? I assume the 
requirement is to have vbus or some supply?

> +    $ref: /schemas/types.yaml#/definitions/phandle
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/gpio/gpio.h>
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +
> +    i2c {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        charger@35 {
> +            compatible = "maxim,max8971";
> +            reg = <0x35>;
> +
> +            interrupt-parent = <&gpio>;
> +            interrupts = <74 IRQ_TYPE_LEVEL_LOW>;
> +
> +            monitored-battery = <&battery>;
> +            maxim,usb-connector = <&usb_con>;
> +        };
> +    };
> +...
> -- 
> 2.43.0
>