linux-kernel - Re: [PATCH v2 1/3] dt-bindings: clock: add rk3576 cru bindings

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Message-ID: <87503c5b-95dc-463b-8363-3e1fab03f8f2@kernel.org>
Date: Sun, 4 Aug 2024 11:52:53 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Detlev Casanova <detlev.casanova@...labora.com>,
 linux-kernel@...r.kernel.org
Cc: 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>, Heiko Stuebner <heiko@...ech.de>,
 Philipp Zabel <p.zabel@...gutronix.de>,
 Elaine Zhang <zhangqing@...k-chips.com>, linux-clk@...r.kernel.org,
 devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 linux-rockchip@...ts.infradead.org, kernel@...labora.com
Subject: Re: [PATCH v2 1/3] dt-bindings: clock: add rk3576 cru bindings

On 02/08/2024 23:35, Detlev Casanova wrote:
> Document the device tree bindings of the rockchip rk3576 SoC
> clock and reset unit.
> 
> Signed-off-by: Detlev Casanova <detlev.casanova@...labora.com>

A nit, subject: drop second/last, redundant "bindings". The
"dt-bindings" prefix is already stating that these are bindings.
See also:
https://elixir.bootlin.com/linux/v6.7-rc8/source/Documentation/devicetree/bindings/submitting-patches.rst#L18

> ---
>  .../bindings/clock/rockchip,rk3576-cru.yaml   | 73 +++++++++++++++++++
>  1 file changed, 73 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/clock/rockchip,rk3576-cru.yaml
> 
> diff --git a/Documentation/devicetree/bindings/clock/rockchip,rk3576-cru.yaml b/Documentation/devicetree/bindings/clock/rockchip,rk3576-cru.yaml
> new file mode 100644
> index 0000000000000..929eb6183bf18
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/clock/rockchip,rk3576-cru.yaml
> @@ -0,0 +1,73 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/clock/rockchip,rk3576-cru.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Rockchip rk3576 Family Clock and Reset Control Module
> +
> +maintainers:
> +  - Elaine Zhang <zhangqing@...k-chips.com>
> +  - Heiko Stuebner <heiko@...ech.de>
> +
> +description: |
> +  The RK3576 clock controller generates the clock and also implements a reset
> +  controller for SoC peripherals. For example it provides SCLK_UART2 and
> +  PCLK_UART2, as well as SRST_P_UART2 and SRST_S_UART2 for the second UART
> +  module.
> +  Each clock is assigned an identifier and client nodes can use this identifier
> +  to specify the clock which they consume. All available clock and reset IDs
> +  are defined as preprocessor macros in dt-binding headers.

Drop paragraph, it is obvious. You could provide here the name of the
header...

> +
> +properties:
> +  compatible:
> +    enum:
> +      - rockchip,rk3576-cru
> +
> +  reg:
> +    maxItems: 1
> +
> +  "#clock-cells":
> +    const: 1
> +
> +  "#reset-cells":
> +    const: 1
> +
> +  clocks:
> +    minItems: 2

You can drop minitems

> +    maxItems: 2
> +
> +  clock-names:
> +    items:
> +      - const: xin24m
> +      - const: xin32k
> +
> +  assigned-clocks: true
> +
> +  assigned-clock-rates: true
> +
> +  assigned-clock-parents: true

Drop  all these three

> +
> +  rockchip,grf:
> +    $ref: /schemas/types.yaml#/definitions/phandle
> +    description: >
> +      phandle to the syscon managing the "general register files". It is used
> +      for GRF muxes, if missing any muxes present in the GRF will not be
> +      available.
> +
> +required:
> +  - compatible
> +  - reg
> +  - "#clock-cells"
> +  - "#reset-cells"
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    cru: clock-controller@...00000 {

Drop unused label

> +      compatible = "rockchip,rk3576-cru";
> +      reg = <0xfd7c0000 0x5c000>;
> +      #clock-cells = <1>;
> +      #reset-cells = <1>;

Make the example complete.

> +    };

Best regards,
Krzysztof