linux-kernel - Re: [PATCH 1/2] dt-bindings: remoteproc: Add C906L rproc for Sophgo CV1800B SoC

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Message-ID: <20250625191613.GA2059062-robh@kernel.org>
Date: Wed, 25 Jun 2025 14:16:13 -0500
From: Rob Herring <robh@...nel.org>
To: Junhui Liu <junhui.liu@...moral.tech>
Cc: Bjorn Andersson <andersson@...nel.org>,
	Mathieu Poirier <mathieu.poirier@...aro.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Chen Wang <unicorn_wang@...look.com>,
	Inochi Amaoto <inochiama@...il.com>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>, Alexandre Ghiti <alex@...ti.fr>,
	linux-remoteproc@...r.kernel.org, devicetree@...r.kernel.org,
	sophgo@...ts.linux.dev, linux-kernel@...r.kernel.org,
	linux-riscv@...ts.infradead.org
Subject: Re: [PATCH 1/2] dt-bindings: remoteproc: Add C906L rproc for Sophgo
 CV1800B SoC

On Sun, Jun 08, 2025 at 10:37:39AM +0800, Junhui Liu wrote:
> Add C906L remote processor for CV1800B SoC, which is an asymmetric
> processor typically running RTOS.
> 
> Signed-off-by: Junhui Liu <junhui.liu@...moral.tech>
> ---
>  .../bindings/remoteproc/sophgo,cv1800b-c906l.yaml  | 68 ++++++++++++++++++++++
>  1 file changed, 68 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/remoteproc/sophgo,cv1800b-c906l.yaml b/Documentation/devicetree/bindings/remoteproc/sophgo,cv1800b-c906l.yaml
> new file mode 100644
> index 0000000000000000000000000000000000000000..455e957dec01c16424c49ebe5ef451883b0c3d4a
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/remoteproc/sophgo,cv1800b-c906l.yaml
> @@ -0,0 +1,68 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/remoteproc/sophgo,cv1800b-c906l.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Sophgo C906L remote processor controller for CV1800B SoC
> +
> +maintainers:
> +  - Junhui Liu <junhui.liu@...moral.tech>
> +
> +description:
> +  Document the bindings for the C906L remoteproc component that loads and boots
> +  firmwares on the CV1800B SoC.
> +
> +properties:
> +  compatible:
> +    const: sophgo,cv1800b-c906l
> +
> +  firmware-name:
> +    $ref: /schemas/types.yaml#/definitions/string

Already has a type. You just need 'maxItems: 1'.

> +    description:
> +      The name of the firmware file to load for this remote processor, relative
> +      to the firmware search path (typically /lib/firmware/).

That's the same for every 'firmware-name' instance. So drop.

Is there a default name?

> +
> +  memory-region:

       maxItems: 1

> +    description:
> +      Phandle to a reserved memory region that is used to load the firmware for
> +      this remote processor. The remote processor will use this memory region
> +      as its execution memory.
> +
> +  resets:
> +    maxItems: 1
> +
> +  sophgo,syscon:
> +    $ref: /schemas/types.yaml#/definitions/phandle
> +    description:
> +      A phandle to the SEC_SYS region, used for configuration of the remote processor.
> +
> +required:
> +  - compatible
> +  - firmware-name
> +  - memory-region
> +  - resets
> +  - sophgo,syscon
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    reserved-memory {
> +        #address-cells = <1>;
> +        #size-cells = <1>;
> +        ranges;
> +
> +        c906l_mem: region@...40000 {
> +            reg = <0x83f40000 0xc0000>;
> +            no-map;
> +        };
> +    };

Drop. No need to show how /reserved-memory works here.

> +
> +    c906l-rproc {
> +        compatible = "sophgo,cv1800b-c906l";
> +        firmware-name = "c906l-firmware.elf";
> +        memory-region = <&c906l_mem>;
> +        resets = <&rst 294>;
> +        sophgo,syscon = <&sec_sys>;
> +    };
> 
> -- 
> 2.49.0
>