linux-kernel - Re: [PATCH RFC v3 2/7] dt-bindings: clock: Document T-Head TH1520 AP

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Message-ID: <8dc03fdc36b72888bd1b59cec6feebad.sboyd@kernel.org>
Date: Thu, 09 May 2024 15:13:42 -0700
From: Stephen Boyd <sboyd@...nel.org>
To: Albert Ou <aou@...s.berkeley.edu>, Conor Dooley <conor+dt@...nel.org>, Drew Fustini <dfustini@...storrent.com>, Emil Renner Berthing <emil.renner.berthing@...onical.com>, Fu Wei <wefu@...hat.com>, Guo Ren <guoren@...nel.org>, Jisheng Zhang <jszhang@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, Michael Turquette <mturquette@...libre.com>, Palmer Dabbelt <palmer@...belt.com>, Paul Walmsley <paul.walmsley@...ive.com>, Rob Herring <robh@...nel.org>, Thomas Bonnefille <thomas.bonnefille@...tlin.com>, Yangtao Li <frank.li@...o.com>
Cc: linux-riscv@...ts.infradead.org, linux-clk@...r.kernel.org, devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, Drew Fustini <dfustini@...storrent.com>
Subject: Re: [PATCH RFC v3 2/7] dt-bindings: clock: Document T-Head TH1520 AP_SUBSYS controller

Quoting Drew Fustini (2024-05-06 21:55:15)
> diff --git a/Documentation/devicetree/bindings/clock/thead,th1520-clk-ap.yaml b/Documentation/devicetree/bindings/clock/thead,th1520-clk-ap.yaml
> new file mode 100644
> index 000000000000..d7e665c1534a
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/clock/thead,th1520-clk-ap.yaml
> @@ -0,0 +1,64 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/clock/thead,th1520-clk-ap.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: T-HEAD TH1520 AP sub-system clock controller
> +
> +description: |
> +  The T-HEAD TH1520 AP sub-system clock controller configures the
> +  CPU, DPU, GMAC and TEE PLLs.
> +
> +  SoC reference manual
> +  https://openbeagle.org/beaglev-ahead/beaglev-ahead/-/blob/main/docs/TH1520%20System%20User%20Manual.pdf
> +
> +maintainers:
> +  - Jisheng Zhang <jszhang@...nel.org>
> +  - Wei Fu <wefu@...hat.com>
> +  - Drew Fustini <dfustini@...storrent.com>
> +
> +properties:
> +  compatible:
> +    const: thead,th1520-clk-ap
> +
> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    items:
> +      - description: main oscillator (24MHz)
> +
> +  clock-names:
> +    items:
> +      - const: osc

I recommend dropping clock-names so that you don't rely on anything
besides the cell index when describing clk_parent_data.

> +
> +  "#clock-cells":
> +    const: 1
> +    description:
> +      See <dt-bindings/clock/thead,th1520-clk-ap.h> for valid indices.
> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +  - clock-names

If you can't drop it at least make it optional.