linux-kernel - Re: [PATCH v2 04/10] dt-bindings: timer: Add EcoNet EN751221 "HPT" CPU Timer

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Message-ID: <20250326-gigantic-mauve-capuchin-e667ed@krzk-bin>
Date: Wed, 26 Mar 2025 09:04:53 +0100
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Caleb James DeLisle <cjd@...ns.fr>
Cc: linux-mips@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>, 
	Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
	Conor Dooley <conor+dt@...nel.org>, Thomas Bogendoerfer <tsbogend@...ha.franken.de>, 
	Daniel Lezcano <daniel.lezcano@...aro.org>, devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
	benjamin.larsson@...exis.eu
Subject: Re: [PATCH v2 04/10] dt-bindings: timer: Add EcoNet EN751221 "HPT"
 CPU Timer

On Tue, Mar 25, 2025 at 01:43:43PM +0000, Caleb James DeLisle wrote:
> +title: EcoNet EN751221 High Precision Timer (HPT)
> +
> +maintainers:
> +  - Caleb James DeLisle <cjd@...ns.fr>
> +
> +description:
> +  The EcoNet High Precision Timer (HPT) is a timer peripheral found in various
> +  EcoNet SoCs, including the EN751221 and EN751627 families. It provides per-VPE
> +  count/compare registers and a per-CPU control register, with a single interrupt
> +  line using a percpu-devid interrupt mechanism.
> +
> +properties:
> +  compatible:
> +    oneOf:
> +      - items:

Drop items, that's const directly.

> +          - const: econet,en751221-timer
> +      - items:
> +          - const: econet,en751627-timer
> +          - const: econet,en751221-timer
> +
> +  reg: true

Widest constraints are always here.

> +
> +  interrupts:
> +    maxItems: 1
> +    description: A percpu-devid timer interrupt shared across CPUs.
> +
> +  clocks:
> +    maxItems: 1
> +
> +if:

This goes under allOf:, to save re-indent later, and then after
required: block (see example-schema).

> +  properties:
> +    compatible:
> +      contains:
> +        const: econet,en751627-timer
> +then:
> +  properties:
> +    reg:
> +      items:
> +        - description: Base address for VPE timers 0 and 1

s/Base address for//
because it is redundant. Bus/parent addressing already defines this as
base address, cannot be anything else.

> +        - description: Base address for VPE timers 2 and 3
> +else:
> +  properties:
> +    reg:
> +      items:
> +        - description: Base address for VPE timers 0 and 1

Best regards,
Krzysztof