linux-kernel - Re: [PATCH v3 02/25] dt-bindings: clock: Add a binding for the RPi Firmware clocks

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Date:   Fri, 29 May 2020 14:17:16 -0700
From:   Stephen Boyd <sboyd@...nel.org>
To:     Maxime Ripard <maxime@...no.tech>,
        Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
Cc:     linux-rpi-kernel@...ts.infradead.org,
        bcm-kernel-feedback-list@...adcom.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Dave Stevenson <dave.stevenson@...pberrypi.com>,
        Tim Gover <tim.gover@...pberrypi.com>,
        Phil Elwell <phil@...pberrypi.com>,
        Maxime Ripard <maxime@...no.tech>,
        Michael Turquette <mturquette@...libre.com>,
        Rob Herring <robh+dt@...nel.org>, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH v3 02/25] dt-bindings: clock: Add a binding for the RPi Firmware clocks

Quoting Maxime Ripard (2020-05-27 08:44:58)
> The firmware running on the RPi VideoCore can be used to discover and
> change the various clocks running in the BCM2711. Since devices will
> need to use them through the DT, let's add a pretty simple binding.
> 
> Cc: Michael Turquette <mturquette@...libre.com>
> Cc: Stephen Boyd <sboyd@...nel.org>
> Cc: Rob Herring <robh+dt@...nel.org>
> Cc: linux-clk@...r.kernel.org
> Cc: devicetree@...r.kernel.org
> Signed-off-by: Maxime Ripard <maxime@...no.tech>
> ---

Reviewed-by: Stephen Boyd <sboyd@...nel.org>

> diff --git a/Documentation/devicetree/bindings/arm/bcm/raspberrypi,bcm2835-firmware.yaml b/Documentation/devicetree/bindings/arm/bcm/raspberrypi,bcm2835-firmware.yaml
> index cec540c052b6..b48ed875eb8e 100644
> --- a/Documentation/devicetree/bindings/arm/bcm/raspberrypi,bcm2835-firmware.yaml
> +++ b/Documentation/devicetree/bindings/arm/bcm/raspberrypi,bcm2835-firmware.yaml
> @@ -22,6 +22,25 @@ properties:
>        Phandle to the firmware device's Mailbox.
>        (See: ../mailbox/mailbox.txt for more information)
>  
> +  clocks:
> +    type: object
> +
> +    properties:
> +      compatible:
> +        const: raspberrypi,firmware-clocks
> +
> +      "#clock-cells":
> +        const: 1
> +        description: >

Just curious if this is the same as the | syntax? I haven't seen this
used before.

> +          The argument is the ID of the clocks contained by the
> +          firmware messages.
> +