linux-kernel - Re: [PATCH v7 2/4] dt-bindings: clock: sophgo: support SG2042

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Date: Mon, 8 Jan 2024 08:04:14 +0100
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Chen Wang <unicornxw@...il.com>, aou@...s.berkeley.edu,
 chao.wei@...hgo.com, conor@...nel.org, krzysztof.kozlowski+dt@...aro.org,
 mturquette@...libre.com, palmer@...belt.com, paul.walmsley@...ive.com,
 richardcochran@...il.com, robh+dt@...nel.org, sboyd@...nel.org,
 devicetree@...r.kernel.org, linux-clk@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org,
 haijiao.liu@...hgo.com, xiaoguang.xing@...hgo.com, guoren@...nel.org,
 jszhang@...nel.org, inochiama@...look.com, samuel.holland@...ive.com
Cc: Chen Wang <unicorn_wang@...look.com>,
 Conor Dooley <conor.dooley@...rochip.com>
Subject: Re: [PATCH v7 2/4] dt-bindings: clock: sophgo: support SG2042

On 08/01/2024 07:49, Chen Wang wrote:
> From: Chen Wang <unicorn_wang@...look.com>
> 
> Add bindings for the clock generator on the SG2042 RISC-V SoC.
> 
> Signed-off-by: Chen Wang <unicorn_wang@...look.com>
> Reviewed-by: Conor Dooley <conor.dooley@...rochip.com>
> ---
>  .../bindings/clock/sophgo,sg2042-clkgen.yaml  |  53 ++++++
>  .../dt-bindings/clock/sophgo,sg2042-clkgen.h  | 169 ++++++++++++++++++
>  2 files changed, 222 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/clock/sophgo,sg2042-clkgen.yaml
>  create mode 100644 include/dt-bindings/clock/sophgo,sg2042-clkgen.h
> 
> diff --git a/Documentation/devicetree/bindings/clock/sophgo,sg2042-clkgen.yaml b/Documentation/devicetree/bindings/clock/sophgo,sg2042-clkgen.yaml
> new file mode 100644
> index 000000000000..f9935e66fc95
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/clock/sophgo,sg2042-clkgen.yaml
> @@ -0,0 +1,53 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/clock/sophgo,sg2042-clkgen.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Sophgo SG2042 Clock Generator
> +
> +maintainers:
> +  - Chen Wang <unicorn_wang@...look.com>
> +
> +properties:
> +  compatible:
> +    const: sophgo,sg2042-clkgen
> +
> +  reg:
> +    maxItems: 1
> +
> +  sophgo,system-ctrl:
> +    $ref: /schemas/types.yaml#/definitions/phandle
> +    description:
> +      Phandle to SG2042 System Controller node. On SG2042, part of control
> +      registers of Clock Controller are defined in System controller. Clock
> +      driver will use this phandle to get the register map base to plus the
> +      offset of the registers to access them.

Do not describe the driver, but hardware. What registers are in
system-ctrl? What are their purpose? Why this hardware needs them?



Best regards,
Krzysztof