From: Rob Herring <robh@kernel.org>
To: Agustin Santiago Isasmendi <isasmendi.agus@gmail.com>
Cc: "Russell King" <linux@armlinux.org.uk>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, "Arnd Bergmann" <arnd@arndb.de>,
"Stefan Dösinger" <stefandoesinger@gmail.com>,
"Navid Ghahremani" <ghahramani.navid@gmail.com>,
"Krzysztof Kozlowski" <krzk@kernel.org>,
"Conor Dooley" <conor+dt@kernel.org>,
devicetree@vger.kernel.org
Subject: Re: [PATCH v2 1/2] dt-bindings: cache: l2c2x0: a disabled node is left to the firmware
Date: Fri, 13 Nov 2026 09:00:49 -0600 [thread overview]
Message-ID: <20261113150049.GA903773-robh@kernel.org> (raw)
In-Reply-To: <20261112072953.989664-2-isasmendi.agus@gmail.com>
On Thu, Nov 12, 2026 at 08:29:52AM +0100, Agustin Santiago Isasmendi wrote:
> l2x0_of_init() is about to honour status = "disabled" on the L2 cache
> node by leaving the controller alone. Say that the firmware must then
> leave the cache disabled: the kernel does not check or change its state.
>
> Assisted-by: LLM
> Signed-off-by: Agustin Santiago Isasmendi <isasmendi.agus@gmail.com>
> ---
> Documentation/devicetree/bindings/cache/l2c2x0.yaml | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/cache/l2c2x0.yaml b/Documentation/devicetree/bindings/cache/l2c2x0.yaml
> index ee604117ffb3..15b5d8c1ebdf 100644
> --- a/Documentation/devicetree/bindings/cache/l2c2x0.yaml
> +++ b/Documentation/devicetree/bindings/cache/l2c2x0.yaml
> @@ -24,6 +24,9 @@ description: |+
> early secure boot code. Thus no need to deal with their configuration
> in the kernel at all.
>
> + Note 2: A node with status = "disabled" is not touched by the kernel at
> + all: the firmware must leave the cache disabled.
> +
No need for this. That is the expectation of any disabled status. The OS
should treat a disabled node like it is not there. CPU nodes are an
exception.
Rob
next prev parent reply other threads:[~2026-11-13 15:00 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-12 7:29 [PATCH v2 0/2] ARM: l2c: honour status = "disabled" on the L2 cache node Agustin Santiago Isasmendi
2026-11-12 7:29 ` [PATCH v2 1/2] dt-bindings: cache: l2c2x0: a disabled node is left to the firmware Agustin Santiago Isasmendi
2026-11-13 15:00 ` Rob Herring [this message]
2026-11-12 7:29 ` [PATCH v2 2/2] ARM: l2c: honour status = "disabled" on the L2 cache node Agustin Santiago Isasmendi
2026-11-13 0:36 ` [PATCH v2 0/2] " Navid Ghahremani
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