linux-kernel - Re: [PATCH v2 2/8] dt-bindings: clock: document 8ULP's SIM LPAV

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Message-ID: <aPJTquVc8zl727bC@lizhi-Precision-Tower-5810>
Date: Fri, 17 Oct 2025 10:33:14 -0400
From: Frank Li <Frank.li@....com>
To: Laurentiu Mihalcea <laurentiumihalcea111@...il.com>
Cc: Abel Vesa <abelvesa@...nel.org>, Peng Fan <peng.fan@....com>,
	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>, Shawn Guo <shawnguo@...nel.org>,
	Fabio Estevam <festevam@...il.com>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Daniel Baluta <daniel.baluta@....com>,
	Shengjiu Wang <shengjiu.wang@....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,
	Pengutronix Kernel Team <kernel@...gutronix.de>
Subject: Re: [PATCH v2 2/8] dt-bindings: clock: document 8ULP's SIM LPAV

On Fri, Oct 17, 2025 at 04:20:19AM -0700, Laurentiu Mihalcea wrote:
> From: Laurentiu Mihalcea <laurentiu.mihalcea@....com>
>
> Add documentation for i.MX8ULP's SIM LPAV module.
>
> Signed-off-by: Laurentiu Mihalcea <laurentiu.mihalcea@....com>
> ---
>  .../bindings/clock/fsl,imx8ulp-sim-lpav.yaml  | 72 +++++++++++++++++++
>  include/dt-bindings/clock/imx8ulp-clock.h     |  5 ++
>  .../dt-bindings/reset/fsl,imx8ulp-sim-lpav.h  | 16 +++++
>  3 files changed, 93 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/clock/fsl,imx8ulp-sim-lpav.yaml
>  create mode 100644 include/dt-bindings/reset/fsl,imx8ulp-sim-lpav.h
>
> diff --git a/Documentation/devicetree/bindings/clock/fsl,imx8ulp-sim-lpav.yaml b/Documentation/devicetree/bindings/clock/fsl,imx8ulp-sim-lpav.yaml
> new file mode 100644
> index 000000000000..fb3b9028a4c3
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/clock/fsl,imx8ulp-sim-lpav.yaml
> @@ -0,0 +1,72 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/clock/fsl,imx8ulp-sim-lpav.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: NXP i.MX8ULP LPAV System Integration Module (SIM)
> +
> +maintainers:
> +  - Laurentiu Mihalcea <laurentiu.mihalcea@....com>
> +
> +description:
> +  The i.MX8ULP LPAV subsystem contains a block control module known as
> +  SIM LPAV, which offers functionalities such as clock gating or reset
> +  line assertion/de-assertion.
> +
> +properties:
> +  compatible:
> +    const: fsl,imx8ulp-sim-lpav
> +
> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 3
> +
> +  clock-names:
> +    items:
> +      - const: lpav_bus
> +      - const: hifi_core
> +      - const: hifi_plat
> +
> +  '#clock-cells':
> +    const: 1
> +
> +  '#reset-cells':
> +    const: 1
> +
> +  mux-controller:
> +    $ref: /schemas/mux/reg-mux.yaml#
> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +  - clock-names
> +  - '#clock-cells'
> +  - '#reset-cells'
> +  - mux-controller
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/imx8ulp-clock.h>
> +
> +    clock-controller@...50000 {

Maybe mfd is better, this is clock, reset and mux controller actually.

Frank Li

> +        compatible = "fsl,imx8ulp-sim-lpav";
> +        reg = <0x2da50000 0x10000>;
> +        clocks = <&cgc2 IMX8ULP_CLK_LPAV_BUS_DIV>,
> +                 <&cgc2 IMX8ULP_CLK_HIFI_DIVCORE>,
> +                 <&cgc2 IMX8ULP_CLK_HIFI_DIVPLAT>;
> +        clock-names = "lpav_bus", "hifi_core", "hifi_plat";
> +        #clock-cells = <1>;
> +        #reset-cells = <1>;
> +
> +        mux-controller {
> +            compatible = "reg-mux";
> +            #mux-control-cells = <1>;
> +            mux-reg-masks = <0x8 0x00000200>;
> +        };
> +    };
> diff --git a/include/dt-bindings/clock/imx8ulp-clock.h b/include/dt-bindings/clock/imx8ulp-clock.h
> index 827404fadf5c..c62d84d093a9 100644
> --- a/include/dt-bindings/clock/imx8ulp-clock.h
> +++ b/include/dt-bindings/clock/imx8ulp-clock.h
> @@ -255,4 +255,9 @@
>
>  #define IMX8ULP_CLK_PCC5_END		56
>
> +/* LPAV SIM */
> +#define IMX8ULP_CLK_SIM_LPAV_HIFI_CORE		0
> +#define IMX8ULP_CLK_SIM_LPAV_HIFI_PBCLK		1
> +#define IMX8ULP_CLK_SIM_LPAV_HIFI_PLAT		2
> +
>  #endif
> diff --git a/include/dt-bindings/reset/fsl,imx8ulp-sim-lpav.h b/include/dt-bindings/reset/fsl,imx8ulp-sim-lpav.h
> new file mode 100644
> index 000000000000..adf95bb26d21
> --- /dev/null
> +++ b/include/dt-bindings/reset/fsl,imx8ulp-sim-lpav.h
> @@ -0,0 +1,16 @@
> +/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
> +/*
> + * Copyright 2025 NXP
> + */
> +
> +#ifndef DT_BINDING_RESET_IMX8ULP_SIM_LPAV_H
> +#define DT_BINDING_RESET_IMX8ULP_SIM_LPAV_H
> +
> +#define IMX8ULP_SIM_LPAV_HIFI4_DSP_DBG_RST	0
> +#define IMX8ULP_SIM_LPAV_HIFI4_DSP_RST		1
> +#define IMX8ULP_SIM_LPAV_HIFI4_DSP_STALL	2
> +#define IMX8ULP_SIM_LPAV_DSI_RST_BYTE_N		3
> +#define IMX8ULP_SIM_LPAV_DSI_RST_ESC_N		4
> +#define IMX8ULP_SIM_LPAV_DSI_RST_DPI_N		5
> +
> +#endif /* DT_BINDING_RESET_IMX8ULP_SIM_LPAV_H */
> --
> 2.43.0
>