linux-kernel - Re: [PATCH 3/7] dt-bindings: clock: document 8ULP's SIM LPAV

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Message-ID: <20250805-stereotyped-precise-vicugna-1c78ff@kuoka>
Date: Tue, 5 Aug 2025 09:03:41 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Laurentiu Mihalcea <laurentiumihalcea111@...il.com>
Cc: Abel Vesa <abelvesa@...nel.org>, Peng Fan <peng.fan@....com>, 
	Michael Turquette <mturquette@...libre.com>, Stephen Boyd <sboyd@...nel.org>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	Shawn Guo <shawnguo@...nel.org>, Fabio Estevam <festevam@...il.com>, 
	Philipp Zabel <p.zabel@...gutronix.de>, linux-clk@...r.kernel.org, imx@...ts.linux.dev, 
	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
	linux-kernel@...r.kernel.org, Pengutronix Kernel Team <kernel@...gutronix.de>
Subject: Re: [PATCH 3/7] dt-bindings: clock: document 8ULP's SIM LPAV

On Mon, Aug 04, 2025 at 11:54:03AM -0400, Laurentiu Mihalcea wrote:
> From: Laurentiu Mihalcea <laurentiu.mihalcea@....com>
> 
> Add documentation for i.MX8ULP's SIM LPAV module.
> 
> Signed-off-by: Laurentiu Mihalcea <laurentiu.mihalcea@....com>
> ---
>  .../bindings/clock/fsl,imx8ulp-sim-lpav.yaml  | 69 +++++++++++++++++++
>  1 file changed, 69 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/clock/fsl,imx8ulp-sim-lpav.yaml
> 
> diff --git a/Documentation/devicetree/bindings/clock/fsl,imx8ulp-sim-lpav.yaml b/Documentation/devicetree/bindings/clock/fsl,imx8ulp-sim-lpav.yaml
> new file mode 100644
> index 000000000000..ef44f50921f8
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/clock/fsl,imx8ulp-sim-lpav.yaml
> @@ -0,0 +1,69 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/clock/fsl,imx8ulp-sim-lpav.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: NXP i.MX8ULP LPAV System Integration Module (SIM)
> +
> +maintainers:
> +  - Laurentiu Mihalcea <laurentiu.mihalcea@....com>
> +
> +description:
> +  The i.MX8ULP LPAV subsystem contains a block control module known as
> +  SIM LPAV, which offers functionalities such as clock gating or reset
> +  line assertion/de-assertion.
> +
> +properties:
> +  compatible:
> +    items:
> +      - enum:
> +          - fsl,imx8ulp-sim-lpav
> +      - const: syscon

Why is this syscon?

> +
> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 3
> +
> +  clock-names:
> +    items:
> +      - const: lpav_bus
> +      - const: hifi_core
> +      - const: hifi_plat
> +
> +  '#clock-cells':
> +    const: 1
> +    description: clock ID

Drop description, redundant. Look how other bindings write this.

> +
> +  '#reset-cells':
> +    const: 1
> +    description: reset ID

Ditto

> +
> +  mux-controller:
> +    $ref: /schemas/mux/reg-mux.yaml#
> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +  - clock-names
> +  - '#clock-cells'

reset cells and mux controller.



> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/imx8ulp-clock.h>
> +
> +    clock-controller@...50000 {
> +        compatible = "fsl,imx8ulp-sim-lpav", "syscon";
> +        reg = <0x2da50000 0x10000>;
> +        clocks = <&cgc2 IMX8ULP_CLK_LPAV_BUS_DIV>,
> +                 <&cgc2 IMX8ULP_CLK_HIFI_DIVCORE>,
> +                 <&cgc2 IMX8ULP_CLK_HIFI_DIVPLAT>;
> +        clock-names = "lpav_bus", "hifi_core", "hifi_plat";
> +        #clock-cells = <1>;
> +        #reset-cells = <1>;

Incomplete node - missing properties/child. Post complete binding and
complete example.

Best regards,
Krzysztof