linux-kernel - Re: [PATCH 3/5] dt-bindings: reset: ocelot: Add documentation for 'microchip,reset-switch-core' property

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Message-ID: <20200528022502.GA3234572@bogus>
Date:   Wed, 27 May 2020 20:25:02 -0600
From:   Rob Herring <robh@...nel.org>
To:     Lars Povlsen <lars.povlsen@...rochip.com>
Cc:     Sebastian Reichel <sre@...nel.org>, SoC Team <soc@...nel.org>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Microchip Linux Driver Support <UNGLinuxDriver@...rochip.com>,
        linux-pm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 3/5] dt-bindings: reset: ocelot: Add documentation for
 'microchip,reset-switch-core' property

On Wed, May 13, 2020 at 03:08:40PM +0200, Lars Povlsen wrote:
> This documents the 'microchip,reset-switch-core' property in the
> ocelot-reset driver.
> 
> Signed-off-by: Lars Povlsen <lars.povlsen@...rochip.com>
> ---
>  .../devicetree/bindings/power/reset/ocelot-reset.txt        | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/power/reset/ocelot-reset.txt b/Documentation/devicetree/bindings/power/reset/ocelot-reset.txt
> index 4d530d8154848..20fff03753ad2 100644
> --- a/Documentation/devicetree/bindings/power/reset/ocelot-reset.txt
> +++ b/Documentation/devicetree/bindings/power/reset/ocelot-reset.txt
> @@ -9,9 +9,15 @@ microchip Sparx5 armv8 SoC's.
>  Required Properties:
>   - compatible: "mscc,ocelot-chip-reset" or "microchip,sparx5-chip-reset"
> 
> +Optional properties:
> +- microchip,reset-switch-core : Perform a switch core reset at the
> +  time of driver load. This is may be used to initialize the switch
> +  core to a known state (before other drivers are loaded).

How do you know when other drivers are loaded? This could be a module 
perhaps. Doesn't seem like something that belongs in DT.

Can this behavior be implied with "microchip,sparx5-chip-reset"?

Rob