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

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Message-ID: <CAL_Jsq+wJbp7-xoUqorkoieLcxRVnEKDeFNYtdZQdBTg3gWSew@mail.gmail.com>
Date:   Wed, 26 Jul 2023 07:45:24 -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 Tue, Jul 25, 2023 at 12:01 PM Elliot Berman <quic_eberman@...cinc.com> wrote:
>
>
>
> On 7/24/2023 4:23 PM, Rob Herring wrote:
> > 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.
> >
>
> I could also place the reboot-mode functionality straight into
> drivers/firwmare/psci/? I thought that might be more controversial than
> separate driver, but maybe not?
>
> Mark/Loreno, do you have any concerns to add the reboot-mode driver
> functionality directly in drivers/firmware/psci/psci.c?

I'm talking about the binding. Why are you talking about driver
design? They are independent.

Rob