linux-kernel - Re: [PATCH v4 1/9] dt-bindings: mfd: Add TI-Nspire misc registers

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Date:   Wed, 2 Nov 2022 12:35:58 -0500
From:   Rob Herring <robh@...nel.org>
To:     Andrew Davis <afd@...com>
Cc:     Lee Jones <lee@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Arnd Bergmann <arnd@...db.de>,
        Linus Walleij <linus.walleij@...aro.org>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Daniel Tang <dt.tangr@...il.com>,
        Fabian Vogt <fabian@...ter-vogt.de>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 1/9] dt-bindings: mfd: Add TI-Nspire misc registers

On Tue, Nov 01, 2022 at 04:57:56PM -0500, Andrew Davis wrote:
> The TI Nspire devices contain a set of registers with a seemingly
> miscellaneous set of functionality. This area is known simply as the
> "misc" region.
> 
> Signed-off-by: Andrew Davis <afd@...com>
> ---
>  .../bindings/mfd/ti,nspire-misc.yaml          | 55 +++++++++++++++++++
>  1 file changed, 55 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/mfd/ti,nspire-misc.yaml
> 
> diff --git a/Documentation/devicetree/bindings/mfd/ti,nspire-misc.yaml b/Documentation/devicetree/bindings/mfd/ti,nspire-misc.yaml
> new file mode 100644
> index 0000000000000..d409eae7537bd
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mfd/ti,nspire-misc.yaml
> @@ -0,0 +1,55 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +# Copyright (C) 2022 Texas Instruments Incorporated - https://www.ti.com/
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/mfd/ti,nspire-misc.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: TI Nspire MISC hardware block
> +
> +maintainers:
> +  - Andrew Davis <afd@...com>
> +
> +description: |
> +  System controller node represents a register region containing a set
> +  of miscellaneous registers. The registers are not cohesive enough to
> +  represent as any specific type of device. The typical use-case is
> +  for some other node's driver, or platform-specific code, to acquire
> +  a reference to the syscon node (e.g. by phandle, node path, or
> +  search using a specific compatible value), interrogate the node (or
> +  associated OS driver) to determine the location of the registers,
> +  and access the registers directly.

Looks like you copied the generic description? Describe what MISC 
contains.

> +
> +properties:
> +  compatible:
> +    items:
> +      - enum:
> +          - ti,nspire-misc
> +      - const: syscon
> +      - const: simple-mfd
> +
> +  reg:
> +    maxItems: 1
> +
> +  reboot:
> +    $ref: "../power/reset/syscon-reboot.yaml"

/schemas/power/...

And no quotes needed.

> +
> +required:
> +  - compatible
> +  - reg
> +  - reboot
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    misc: misc@...a0000 {
> +      compatible = "ti,nspire-misc", "syscon", "simple-mfd";
> +      reg = <0x900a0000 0x1000>;
> +
> +      reboot {
> +        compatible = "syscon-reboot";
> +        offset = <0x08>;
> +        value = <0x02>;
> +      };
> +    };
> -- 
> 2.37.3
> 
>