linux-kernel - Re: [RFC PATCH 3/4] dt-bindings: power: reset: Document arm,psci-vendor-reset

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Message-ID: <20230724232328.GA1101352-robh@kernel.org>
Date:   Mon, 24 Jul 2023 17:23:28 -0600
From:   Rob Herring <robh@...nel.org>
To:     Elliot Berman <quic_eberman@...cinc.com>
Cc:     Mark Rutland <mark.rutland@....com>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Sebastian Reichel <sre@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        linux-arm-kernel@...ts.infradead.org, linux-pm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, kernel@...cinc.com,
        Satya Durga Srinivasu Prabhala <quic_satyap@...cinc.com>,
        Melody Olvera <quic_molvera@...cinc.com>,
        Prasad Sodagudi <quic_psodagud@...cinc.com>
Subject: Re: [RFC PATCH 3/4] dt-bindings: power: reset: Document
 arm,psci-vendor-reset

On Mon, Jul 24, 2023 at 03:30:53PM -0700, Elliot Berman wrote:
> Add devicetree bindings for using PSCI SYSTEM_RESET2 with vendor reset  types.
> 
> Signed-off-by: Elliot Berman <quic_eberman@...cinc.com>
> ---
>  .../power/reset/arm,psci-vendor-reset.yaml    | 35 +++++++++++++++++++
>  MAINTAINERS                                   |  1 +
>  2 files changed, 36 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/power/reset/arm,psci-vendor-reset.yaml
> 
> diff --git a/Documentation/devicetree/bindings/power/reset/arm,psci-vendor-reset.yaml b/Documentation/devicetree/bindings/power/reset/arm,psci-vendor-reset.yaml
> new file mode 100644
> index 000000000000..18b0b8c167a1
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/power/reset/arm,psci-vendor-reset.yaml
> @@ -0,0 +1,35 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +# Copyright 2023 Qualcomm Innovation Center, Inc. All Rights Reserved.
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/power/reset/arm,psci-vendor-reset.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: PSCI SYSTEM_RESET2 Vendor Resets
> +
> +maintainers:
> +  - Elliot Berman <quic_eberman@...cinc.com>
> +
> +description: |
> +  PSCI SYSTEM_RESET2 supports vendor-defined reset types. This describes
> +  the conversion of reboot modes to the reset types.
> +
> +properties:
> +  compatible:
> +    const: arm,psci-vendor-reset
> +
> +allOf:
> +  - $ref: reboot-mode.yaml#
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    firmware {
> +      psci-vendor-resets {
> +        compatible = "arm,psci-vendor-reset";

We already have a node for PSCI, we don't need a second one. You can 
have a separate driver without a separate node. 

> +        reboot-normal = <0x100>;

Wouldn't 'normal' be the normal PSCI reset?

> +        reboot-bootloader = <0x101>;
> +        reboot-fastboot = <0x102>;
> +      };
> +    };
> diff --git a/MAINTAINERS b/MAINTAINERS
> index d516295978a4..2da4c5f1917b 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -16982,6 +16982,7 @@ M:	Mark Rutland <mark.rutland@....com>
>  M:	Lorenzo Pieralisi <lpieralisi@...nel.org>
>  L:	linux-arm-kernel@...ts.infradead.org (moderated for non-subscribers)
>  S:	Maintained
> +F:	Documentation/devicetree/bindings/power/reset/arm,psci-vendor-reset.yaml
>  F:	drivers/firmware/psci/
>  F:	include/linux/psci.h
>  F:	include/uapi/linux/psci.h
> -- 
> 2.41.0
>