linux-kernel - Re: [PATCH v4 1/6] dt-bindindgs: clock: nxp: support i.MX95 VPU CSR module

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Date: Fri, 15 Mar 2024 10:54:22 -0600
From: Rob Herring <robh@...nel.org>
To: "Peng Fan (OSS)" <peng.fan@....nxp.com>
Cc: Abel Vesa <abelvesa@...nel.org>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>, linux-clk@...r.kernel.org,
	imx@...ts.linux.dev, devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Peng Fan <peng.fan@....com>
Subject: Re: [PATCH v4 1/6] dt-bindindgs: clock: nxp: support i.MX95 VPU CSR
 module

On Thu, Mar 14, 2024 at 09:25:10PM +0800, Peng Fan (OSS) wrote:
> From: Peng Fan <peng.fan@....com>
> 
> The i.MX95 VPU_CSR contains control and status registers for VPU
> status, pending transaction status, and clock gating controls.
> 
> This patch is to add clock features for VPU CSR.
> 
> Signed-off-by: Peng Fan <peng.fan@....com>
> ---
>  .../bindings/clock/nxp,imx95-vpu-csr.yaml          | 50 ++++++++++++++++++++++
>  include/dt-bindings/clock/nxp,imx95-clock.h        | 14 ++++++
>  2 files changed, 64 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/clock/nxp,imx95-vpu-csr.yaml b/Documentation/devicetree/bindings/clock/nxp,imx95-vpu-csr.yaml
> new file mode 100644
> index 000000000000..4a1c6dcfe3f8
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/clock/nxp,imx95-vpu-csr.yaml
> @@ -0,0 +1,50 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/clock/nxp,imx95-vpu-csr.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: NXP i.MX95 VPUMIX Block Control
> +
> +maintainers:
> +  - Peng Fan <peng.fan@....com>
> +
> +properties:
> +  compatible:
> +    items:
> +      - const: nxp,imx95-vpu-csr
> +      - const: syscon
> +
> +  reg:
> +    maxItems: 1
> +
> +  power-domains:
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 1
> +
> +  '#clock-cells':
> +    const: 1
> +    description:
> +      The clock consumer should specify the desired clock by having the clock
> +      ID in its "clocks" phandle cell. See
> +      include/dt-bindings/clock/nxp,imx95-clock.h
> +
> +required:
> +  - compatible
> +  - reg
> +  - '#clock-cells'
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    syscon@...10000 {
> +      compatible = "nxp,imx95-vpu-csr", "syscon";
> +      reg = <0x4c410000 0x10000>;
> +      #clock-cells = <1>;
> +      clocks = <&scmi_clk 114>;
> +      power-domains = <&scmi_devpd 21>;
> +    };
> +...
> diff --git a/include/dt-bindings/clock/nxp,imx95-clock.h b/include/dt-bindings/clock/nxp,imx95-clock.h
> new file mode 100644
> index 000000000000..9d8f0a6d12d0
> --- /dev/null
> +++ b/include/dt-bindings/clock/nxp,imx95-clock.h
> @@ -0,0 +1,14 @@
> +/* SPDX-License-Identifier: GPL-2.0-only OR MIT */
> +/*
> + * Copyright 2024 NXP
> + */
> +
> +#ifndef __DT_BINDINGS_CLOCK_IMX95_H
> +#define __DT_BINDINGS_CLOCK_IMX95_H
> +
> +#define IMX95_CLK_VPUBLK_WAVE			0
> +#define IMX95_CLK_VPUBLK_JPEG_ENC		1
> +#define IMX95_CLK_VPUBLK_JPEG_DEC		2
> +#define IMX95_CLK_VPUBLK_END			3

If this number can change, then it is not ABI and doesn't go in this 
header. With that dropped,

Reviewed-by: Rob Herring <robh@...nel.org>