linux-kernel - Re: [PATCH 01/22] dt-bindings: iommu: sun50i: remove resets from required property

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Message-ID: <aJTFzQP61Kt02gOj@shepard>
Date: Thu, 7 Aug 2025 17:27:09 +0200
From: Paul Kocialkowski <paulk@...-base.io>
To: Parthiban Nallathambi <parthiban@...umiz.com>
Cc: Joerg Roedel <joro@...tes.org>, Will Deacon <will@...nel.org>,
	Robin Murphy <robin.murphy@....com>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Chen-Yu Tsai <wens@...e.org>,
	Jernej Skrabec <jernej.skrabec@...il.com>,
	Samuel Holland <samuel@...lland.org>,
	Maxime Ripard <mripard@...nel.org>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Linus Walleij <linus.walleij@...aro.org>,
	Vinod Koul <vkoul@...nel.org>,
	Kishon Vijay Abraham I <kishon@...nel.org>, iommu@...ts.linux.dev,
	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-sunxi@...ts.linux.dev, linux-kernel@...r.kernel.org,
	dri-devel@...ts.freedesktop.org, linux-clk@...r.kernel.org,
	linux-gpio@...r.kernel.org, linux-phy@...ts.infradead.org
Subject: Re: [PATCH 01/22] dt-bindings: iommu: sun50i: remove resets from
 required property

Hi Parthiban,

On Fri 27 Dec 24, 16:37, Parthiban Nallathambi wrote:
> iommu in a133/a100 does not have reset control. remove it
> from required property to make it optional.
> 
> Signed-off-by: Parthiban Nallathambi <parthiban@...umiz.com>
> ---
>  Documentation/devicetree/bindings/iommu/allwinner,sun50i-h6-iommu.yaml | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/iommu/allwinner,sun50i-h6-iommu.yaml b/Documentation/devicetree/bindings/iommu/allwinner,sun50i-h6-iommu.yaml
> index a8409db4a3e3..03176f68485b 100644
> --- a/Documentation/devicetree/bindings/iommu/allwinner,sun50i-h6-iommu.yaml
> +++ b/Documentation/devicetree/bindings/iommu/allwinner,sun50i-h6-iommu.yaml
> @@ -42,7 +42,6 @@ required:
>    - reg
>    - interrupts
>    - clocks
> -  - resets

Since it was previously specified that other platforms do need the reset line,
the required part should be applied conditionally based on the compatible, not
removed entirely.

Also your commit title and message would look better with uppercase first
letters at the start of a sentence :)

All the best,

Paul

>  additionalProperties: false

-- 
Paul Kocialkowski,

Independent contractor - sys-base - https://www.sys-base.io/
Free software developer - https://www.paulk.fr/

Expert in multimedia, graphics and embedded hardware support with Linux.

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