linux-kernel - Re: [PATCH v2 1/4] dt-bindings: reset: Add Armada8K reset controller

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Message-ID: <20250221234041.GA387671-robh@kernel.org>
Date: Fri, 21 Feb 2025 17:40:41 -0600
From: Rob Herring <robh@...nel.org>
To: Krzysztof Kozlowski <krzk@...nel.org>
Cc: Wilson Ding <dingwei@...vell.com>, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	andrew@...n.ch, gregory.clement@...tlin.com,
	sebastian.hesselbarth@...il.com, krzk+dt@...nel.org,
	conor+dt@...nel.org, p.zabel@...gutronix.de, salee@...vell.com,
	gakula@...vell.com
Subject: Re: [PATCH v2 1/4] dt-bindings: reset: Add Armada8K reset controller

On Fri, Feb 21, 2025 at 09:46:01AM +0100, Krzysztof Kozlowski wrote:
> On Thu, Feb 20, 2025 at 03:25:24PM -0800, Wilson Ding wrote:
> > Add device-tree binding documentation for the Armada8K reset driver.
> > 
> > Signed-off-by: Wilson Ding <dingwei@...vell.com>
> > ---
> >  .../reset/marvell,armada8k-reset.yaml         | 45 +++++++++++++++++++
> >  1 file changed, 45 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/reset/marvell,armada8k-reset.yaml
> > 
> > diff --git a/Documentation/devicetree/bindings/reset/marvell,armada8k-reset.yaml b/Documentation/devicetree/bindings/reset/marvell,armada8k-reset.yaml
> > new file mode 100644
> > index 000000000000..b9f7f3c24d3c
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/reset/marvell,armada8k-reset.yaml
> > @@ -0,0 +1,45 @@
> > +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> > +# Copyright 2025 Wilson Ding <dingwei@...vell.com>
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/reset/marvell,armada8k-reset.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Marvell Armada8K reset controller
> > +
> > +maintainers:
> > +  - Wilson Ding <dingwei@...vell.com>
> > +
> > +description: The reset controller node must be a sub-node of the system
> > +  controller node on Armada7K/8K or CN913x SoCs.
> > +
> > +properties:
> > +  compatible:
> > +    const: marvell,armada8k-reset
> > +
> > +  offset:
> > +    $ref: /schemas/types.yaml#/definitions/uint32
> > +    description: Offset in the register map for the gpio registers (in bytes)
> 
> That's neither correct nor needed. Your device knows ofsset based on the
> compatible.

Or use 'reg'.

But really, just add #reset-cells to the parent node. There's no need 
for a child node here. The parent needs a specific compatible though.

Rob