linux-hardening - Re: [PATCH v3 09/10] drm/panthor: add no_clocks soc

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Message-ID: <4522baca-7262-457c-94d4-326b660aad97@collabora.com>
Date: Wed, 17 Sep 2025 14:43:40 +0200
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
To: Nicolas Frattaroli <nicolas.frattaroli@...labora.com>,
 Boris Brezillon <boris.brezillon@...labora.com>,
 Steven Price <steven.price@....com>, Liviu Dudau <liviu.dudau@....com>,
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, Matthias Brugger
 <matthias.bgg@...il.com>, MyungJoo Ham <myungjoo.ham@...sung.com>,
 Kyungmin Park <kyungmin.park@...sung.com>,
 Chanwoo Choi <cw00.choi@...sung.com>, Jassi Brar <jassisinghbrar@...il.com>,
 Kees Cook <kees@...nel.org>, "Gustavo A. R. Silva" <gustavoars@...nel.org>,
 Chia-I Wu <olvaffe@...il.com>, Chen-Yu Tsai <wenst@...omium.org>
Cc: kernel@...labora.com, dri-devel@...ts.freedesktop.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org,
 linux-pm@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Re: [PATCH v3 09/10] drm/panthor: add no_clocks soc_data member for
 MT8196

Il 17/09/25 14:22, Nicolas Frattaroli ha scritto:
> While panthor does not try to do anything untoward with the core clock
> outside of increasing its enable/disable count, the spirit of using DT
> to describe hardware, not what drivers need, informs us that on the
> MT8196, panthor should work without one, as the true owner of the clocks
> in this case is the performance-domain.
> 
> Add a boolean to the soc_data struct that tells panthor whether on any
> given SoC, it can leave even the core clock NULL. Set it to true for the
> MT8196 soc_data instance.
> 
> Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli@...labora.com>

The only doubt that I have here is about the "no_clocks" name, as it may be read
as "number of clocks" ("no" is often used as "number").

I don't really have any better name to suggest though, and the execution is right,
so.....

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>

Cheers,
Angelo