linux-kernel - Re: [PATCH 25/26] dt-bindings: reserved-memory: Add Google Kinfo Pixel reserved memory

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Message-ID: <20251119224104.GA3371358-robh@kernel.org>
Date: Wed, 19 Nov 2025 16:41:04 -0600
From: Rob Herring <robh@...nel.org>
To: Eugen Hristev <eugen.hristev@...aro.org>
Cc: linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, tglx@...utronix.de, andersson@...nel.org,
	pmladek@...e.com, rdunlap@...radead.org, corbet@....net,
	david@...hat.com, mhocko@...e.com, tudor.ambarus@...aro.org,
	mukesh.ojha@....qualcomm.com, linux-arm-kernel@...ts.infradead.org,
	linux-hardening@...r.kernel.org, jonechou@...gle.com,
	rostedt@...dmis.org, linux-doc@...r.kernel.org,
	devicetree@...r.kernel.org, linux-remoteproc@...r.kernel.org,
	linux-arch@...r.kernel.org, tony.luck@...el.com, kees@...nel.org
Subject: Re: [PATCH 25/26] dt-bindings: reserved-memory: Add Google Kinfo
 Pixel reserved memory

On Wed, Nov 19, 2025 at 05:44:26PM +0200, Eugen Hristev wrote:
> Add documentation for Google Kinfo Pixel reserved memory area.
> 
> Signed-off-by: Eugen Hristev <eugen.hristev@...aro.org>
> ---
>  .../reserved-memory/google,kinfo.yaml         | 49 +++++++++++++++++++
>  MAINTAINERS                                   |  5 ++
>  2 files changed, 54 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/reserved-memory/google,kinfo.yaml
> 
> diff --git a/Documentation/devicetree/bindings/reserved-memory/google,kinfo.yaml b/Documentation/devicetree/bindings/reserved-memory/google,kinfo.yaml
> new file mode 100644
> index 000000000000..12d0b2815c02
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/reserved-memory/google,kinfo.yaml
> @@ -0,0 +1,49 @@
> +# SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/reserved-memory/google,kinfo.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Google Pixel Kinfo reserved memory
> +
> +maintainers:
> +  - Eugen Hristev <eugen.hristev@...aro.org>
> +
> +description:
> +  This binding describes the Google Pixel Kinfo reserved memory, a region
> +  of reserved-memory used to store data for firmware/bootloader on the Pixel
> +  platform. The data stored is debugging information on the running kernel.
> +
> +properties:
> +  compatible:
> +    items:
> +      - const: google,kinfo
> +
> +  memory-region:
> +    maxItems: 1
> +    description: Reference to the reserved-memory for the data
> +
> +required:
> +  - compatible
> +  - memory-region
> +
> +additionalProperties: true
> +
> +examples:
> +  - |
> +    reserved-memory {
> +      #address-cells = <1>;
> +      #size-cells = <1>;
> +      ranges;
> +
> +      kinfo_region: smem@...0000 {

Just put the google,kinfo (or google,debug-kinfo??) compatible here and 
that's it.

> +          reg = <0xfa00000 0x1000>;
> +          no-map;

You don't need to access the memory?

> +      };
> +    };
> +
> +    debug-kinfo {
> +        compatible = "google,debug-kinfo";
> +
> +        memory-region = <&kinfo_region>;
> +    };