linux-kernel - Re: [PATCH v3 1/5] dt-bindings: reset: IMX8MQ VPU reset

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Message-ID: <20210308182356.GB2735443@robh.at.kernel.org>
Date:   Mon, 8 Mar 2021 11:23:56 -0700
From:   Rob Herring <robh@...nel.org>
To:     Benjamin Gaignard <benjamin.gaignard@...labora.com>
Cc:     p.zabel@...gutronix.de, shawnguo@...nel.org,
        s.hauer@...gutronix.de, festevam@...il.com, ezequiel@...labora.com,
        mchehab@...nel.org, gregkh@...uxfoundation.org,
        kernel@...gutronix.de, linux-imx@....com,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
        linux-rockchip@...ts.infradead.org, devel@...verdev.osuosl.org,
        kernel@...labora.com
Subject: Re: [PATCH v3 1/5] dt-bindings: reset: IMX8MQ VPU reset

On Mon, Mar 01, 2021 at 04:17:50PM +0100, Benjamin Gaignard wrote:
> Document bindings for IMX8MQ VPU reset hardware block
> 
> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@...labora.com>
> ---
>  .../bindings/reset/fsl,imx8mq-vpu-reset.yaml  | 54 +++++++++++++++++++
>  include/dt-bindings/reset/imx8mq-vpu-reset.h  | 16 ++++++
>  2 files changed, 70 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/reset/fsl,imx8mq-vpu-reset.yaml
>  create mode 100644 include/dt-bindings/reset/imx8mq-vpu-reset.h
> 
> diff --git a/Documentation/devicetree/bindings/reset/fsl,imx8mq-vpu-reset.yaml b/Documentation/devicetree/bindings/reset/fsl,imx8mq-vpu-reset.yaml
> new file mode 100644
> index 000000000000..00020421c0e3
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/reset/fsl,imx8mq-vpu-reset.yaml
> @@ -0,0 +1,54 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/reset/fsl,imx8mq-vpu-reset.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Freescale i.MX8MQ VPU Reset Controller
> +
> +maintainers:
> +  - Benjamin Gaignard <benjamin.gaignard@...labora.com>
> +
> +description: |
> +  The VPU reset controller is used to reset the video processor
> +  unit peripherals. Device nodes that need access to reset lines should
> +  specify them as a reset phandle in their corresponding node as
> +  specified in reset.txt.
> +
> +  For list of all valid reset indices see
> +    <dt-bindings/reset/imx8mq-vpu-reset.h> for i.MX8MQ.
> +
> +properties:
> +  compatible:
> +    items:
> +      - const: fsl,imx8mq-vpu-reset
> +      - const: syscon

Is there other functionality in the block? If so, add some details in 
'description' above.

> +
> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    minItems: 1
> +    maxItems: 3

Need to say what each clock is.

> +
> +  '#reset-cells':
> +    const: 1
> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +  - '#reset-cells'
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/imx8mq-clock.h>
> +
> +    vpu-reset@...20000 {

reset-controller@...

> +        compatible = "fsl,imx8mq-vpu-reset", "syscon";
> +        reg = <0x38320000 0x10000>;
> +        clocks = <&clk IMX8MQ_CLK_VPU_DEC_ROOT>;
> +        #reset-cells = <1>;
> +    };
> diff --git a/include/dt-bindings/reset/imx8mq-vpu-reset.h b/include/dt-bindings/reset/imx8mq-vpu-reset.h
> new file mode 100644
> index 000000000000..efcbe18177fe
> --- /dev/null
> +++ b/include/dt-bindings/reset/imx8mq-vpu-reset.h
> @@ -0,0 +1,16 @@
> +/* SPDX-License-Identifier: GPL-2.0-only */
> +/*
> + * Copyright (c) 2021, Collabora
> + *
> + * i.MX7 System Reset Controller (SRC) driver
> + *
> + * Author: Benjamin Gaignard <benjamin.gaignard@...labora.com>
> + */
> +
> +#ifndef DT_BINDINGS_VPU_RESET_IMX8MQ
> +#define DT_BINDINGS_VPU_RESET_IMX8MQ
> +
> +#define IMX8MQ_RESET_VPU_RESET_G1	0
> +#define IMX8MQ_RESET_VPU_RESET_G2	1
> +
> +#endif
> -- 
> 2.25.1
>