linux-kernel - Re: [PATCH] dt-bindings: clock: add i.MX8M Anatop

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Date:   Thu, 8 Sep 2022 11:52:48 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     "Peng Fan (OSS)" <peng.fan@....nxp.com>, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, abelvesa@...nel.org,
        abel.vesa@...aro.org, sboyd@...nel.org
Cc:     shawnguo@...nel.org, s.hauer@...gutronix.de, kernel@...gutronix.de,
        festevam@...il.com, linux-imx@....com, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, Peng Fan <peng.fan@....com>
Subject: Re: [PATCH] dt-bindings: clock: add i.MX8M Anatop

On 06/09/2022 11:00, Peng Fan (OSS) wrote:
> From: Peng Fan <peng.fan@....com>
> 
> i.MX8M Family features an anatop module the produces PLL to clock
> control module(CCM) root clock. Add the missing yaml file.
> 
> Signed-off-by: Peng Fan <peng.fan@....com>
> ---
>  .../bindings/clock/imx8m-anatop.yaml          | 46 +++++++++++++++++++
>  1 file changed, 46 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/clock/imx8m-anatop.yaml
> 
> diff --git a/Documentation/devicetree/bindings/clock/imx8m-anatop.yaml b/Documentation/devicetree/bindings/clock/imx8m-anatop.yaml
> new file mode 100644
> index 000000000000..e247a5774d17
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/clock/imx8m-anatop.yaml

Filename: fsl,imx8m-anatop.yaml

> @@ -0,0 +1,46 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/clock/imx8m-anatop.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: NXP i.MX8M Family Anatop Module
> +
> +maintainers:
> +  - Peng Fan <peng.fan@....com>
> +
> +description: |
> +  NXP i.MX8M Family anatop PLL module which generates PLL to CCM root.

Description suggests it is a clock controller (you literally write it
generates PLL), but bindings are for system registers (syscon). If it is
PLL, you should make it a real clock provider.

> +
> +properties:
> +  compatible:
> +    oneOf:
> +      - items:
> +          - enum:
> +              - fsl,imx8mm-anatop
> +              - fsl,imx8mq-anatop
> +          - const: syscon
> +      - items:
> +          - enum:
> +              - fsl,imx8mn-anatop
> +              - fsl,imx8mp-anatop
> +          - const: fsl,imx8mm-anatop
> +          - const: syscon
> +
> +  reg:
> +    maxItems: 1
> +
> +required:
> +  - compatible
> +  - reg
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    anatop: anatop@...60000 {

Node name: syscon or clock-controller if it is a clock provider.

> +        compatible = "fsl,imx8mn-anatop", "fsl,imx8mm-anatop", "syscon";
> +        reg = <0x30360000 0x10000>;
> +    };
> +
> +...


Best regards,
Krzysztof