linux-kernel - Re: [PATCH 10/14] dt-bindings: clock: sparx5: Add Sparx5 SoC DPLL clock

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Date:   Wed, 27 May 2020 20:18:26 -0600
From:   Rob Herring <robh@...nel.org>
To:     Lars Povlsen <lars.povlsen@...rochip.com>
Cc:     SoC Team <soc@...nel.org>, Arnd Bergmann <arnd@...db.de>,
        Stephen Boyd <sboyd@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Steen Hegelund <Steen.Hegelund@...rochip.com>,
        Microchip Linux Driver Support <UNGLinuxDriver@...rochip.com>,
        Olof Johansson <olof@...om.net>,
        Michael Turquette <mturquette@...libre.com>,
        devicetree@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-gpio@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org,
        Alexandre Belloni <alexandre.belloni@...tlin.com>
Subject: Re: [PATCH 10/14] dt-bindings: clock: sparx5: Add Sparx5 SoC DPLL
 clock

On Wed, May 13, 2020 at 02:55:28PM +0200, Lars Povlsen wrote:
> This add the DT bindings documentation for the Sparx5 SoC DPLL clock
> 
> Reviewed-by: Alexandre Belloni <alexandre.belloni@...tlin.com>
> Signed-off-by: Lars Povlsen <lars.povlsen@...rochip.com>
> ---
>  .../bindings/clock/microchip,sparx5-dpll.yaml | 46 +++++++++++++++++++
>  1 file changed, 46 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/clock/microchip,sparx5-dpll.yaml
> 
> diff --git a/Documentation/devicetree/bindings/clock/microchip,sparx5-dpll.yaml b/Documentation/devicetree/bindings/clock/microchip,sparx5-dpll.yaml
> new file mode 100644
> index 0000000000000..594007d8fc59a
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/clock/microchip,sparx5-dpll.yaml
> @@ -0,0 +1,46 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/clock/microchip,sparx5-dpll.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Microchip Sparx5 DPLL Clock
> +
> +maintainers:
> +  - Lars Povlsen <lars.povlsen@...rochip.com>
> +
> +description: |
> +  The Sparx5 DPLL clock controller generates and supplies clock to
> +  various peripherals within the SoC.
> +
> +  This binding uses common clock bindings
> +  [1] Documentation/devicetree/bindings/clock/clock-bindings.txt
> +
> +properties:
> +  compatible:
> +    const: microchip,sparx5-dpll
> +
> +  reg:
> +    items:
> +      - description: dpll registers

For a single entry, just:

maxItems: 1

> +
> +  '#clock-cells':
> +    const: 1
> +
> +required:
> +  - compatible
> +  - reg
> +  - '#clock-cells'
> +
> +additionalProperties: false
> +
> +examples:
> +  # Clock provider for eMMC:
> +  - |
> +    clks: clks@...10000c {

clock-controller@...0000c {

> +         compatible = "microchip,sparx5-dpll";
> +         #clock-cells = <1>;
> +         reg = <0x1110000c 0x24>;

Looks like this is a sub-block in some other h/w block. What's the 
parent device? That should be described and this should be part of it 
either as a single node or a child node. Without a complete view of what 
this block has I can't provide any guidance.

Rob