linux-kernel - Re: [PATCH v5 1/3] dt-bindings: reset: add sky1 reset controller

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Message-ID: <20260129162304.GA1209761-robh@kernel.org>
Date: Thu, 29 Jan 2026 10:23:04 -0600
From: Rob Herring <robh@...nel.org>
To: Gary Yang <gary.yang@...tech.com>
Cc: lee@...nel.org, krzk+dt@...nel.org, conor+dt@...nel.org,
	p.zabel@...gutronix.de, peter.chen@...tech.com,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	cix-kernel-upstream@...tech.com
Subject: Re: [PATCH v5 1/3] dt-bindings: reset: add sky1 reset controller

On Thu, Jan 29, 2026 at 03:00:44PM +0800, Gary Yang wrote:
> There are two reset controllers on Cix sky1 Soc. One is located in S0
> domain, and the other is located in S0 and S5 domain.

The comments on v4 still apply... Repeated below...

> 
> Signed-off-by: Gary Yang <gary.yang@...tech.com>
> Signed-off-by: Peter Chen <peter.chen@...tech.com>
> ---
>  .../bindings/reset/cix,sky1-rst.yaml          |  41 +++++
>  .../soc/cix/cix,sky1-system-controller.yaml   |  48 +++++
>  include/dt-bindings/reset/cix,sky1-rst-fch.h  |  42 +++++
>  include/dt-bindings/reset/cix,sky1-rst.h      | 164 ++++++++++++++++++
>  4 files changed, 295 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/reset/cix,sky1-rst.yaml
>  create mode 100644 Documentation/devicetree/bindings/soc/cix/cix,sky1-system-controller.yaml
>  create mode 100644 include/dt-bindings/reset/cix,sky1-rst-fch.h
>  create mode 100644 include/dt-bindings/reset/cix,sky1-rst.h
> 
> diff --git a/Documentation/devicetree/bindings/reset/cix,sky1-rst.yaml b/Documentation/devicetree/bindings/reset/cix,sky1-rst.yaml
> new file mode 100644
> index 000000000000..b52791e2b18e
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/reset/cix,sky1-rst.yaml
> @@ -0,0 +1,41 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/reset/cix,sky1-rst.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: CIX Sky1 Reset Controller
> +
> +maintainers:
> +  - Gary Yang <gary.yang@...tech.com>
> +
> +description: |
> +  CIX Sky1 reset controller can be used to reset various set of peripherals.
> +  There are two reset controllers, one is located in S0 domain, the other
> +  is located in S0 and S5 domain.
> +
> +  See also:
> +  - include/dt-bindings/reset/cix,sky1-rst.h
> +
> +properties:
> +  compatible:
> +    items:
> +      - enum:
> +          - cix,sky1-rst
> +          - cix,sky1-rst-fch
> +
> +  '#reset-cells':
> +    const: 1
> +
> +required:
> +  - compatible
> +  - '#reset-cells'
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    reset-controller {
> +      compatible = "cix,sky1-rst";
> +      #reset-cells = <1>;
> +    };
> diff --git a/Documentation/devicetree/bindings/soc/cix/cix,sky1-system-controller.yaml b/Documentation/devicetree/bindings/soc/cix/cix,sky1-system-controller.yaml
> new file mode 100644
> index 000000000000..913e77fc522a
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/soc/cix/cix,sky1-system-controller.yaml
> @@ -0,0 +1,48 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/soc/cix/cix,sky1-system-controller.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Cix Sky1 SoC system controller register region
> +
> +maintainers:
> +  - Gary Yang <gary.yang@...tech.com>
> +
> +description:
> +  An wide assortment of registers of the system controller on Sky1 SoC,
> +  including resets and usb.
> +
> +properties:
> +  compatible:
> +    items:
> +      - enum:
> +          - cix,sky1-system-controller
> +          - cix,sky1-s5-system-controller
> +      - const: syscon
> +      - const: simple-mfd
> +
> +  reg:
> +    maxItems: 1
> +
> +patternProperties:
> +  "^reset(-controller)?$":
> +    type: object
> +    $ref: /schemas/reset/cix,sky1-rst.yaml#

This is not a separate device.

> +
> +required:
> +  - compatible
> +  - reg
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    syscon@...00000 {
> +      compatible = "cix,sky1-s5-system-controller", "syscon", "simple-mfd";
> +      reg = <0x16000000 0x1000>;
> +      reset-controller {
> +        compatible = "cix,sky1-rst";
> +        #reset-cells = <1>;

Move #reset-cells to the parent node and drop this node. And then drop 
"simple-mfd". Or perhaps the definition for what's in the 
"cix,sky1-s5-system-controller" is incomplete? If so, please define all 
the binding.

Rob