linux-kernel - Re: [PATCH v2 1/3] dt-bindings: usb: ci-hdrc-usb2: add property disable-runtime-pm

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Message-ID: <20200716192452.GA2699629@bogus>
Date:   Thu, 16 Jul 2020 13:24:52 -0600
From:   Rob Herring <robh@...nel.org>
To:     Philippe Schenker <philippe.schenker@...adex.com>
Cc:     devicetree@...r.kernel.org, linux-usb@...r.kernel.org,
        Peter Chen <Peter.Chen@....com>,
        Shawn Guo <shawnguo@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/3] dt-bindings: usb: ci-hdrc-usb2: add property
 disable-runtime-pm

On Tue, Jul 14, 2020 at 05:18:20PM +0200, Philippe Schenker wrote:
> Chipidea depends on some hardware signals to be there in order
> for runtime-pm to work well. Add the possibility to disable runtime
> power management that is necessary for certain boards.

This is why we have SoC specific compatible strings. Use that.

> 
> Signed-off-by: Philippe Schenker <philippe.schenker@...adex.com>
> ---
> 
> Changes in v2: None
> 
>  Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
> index 51376cbe5f3d..67a31df13e69 100644
> --- a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
> +++ b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
> @@ -90,6 +90,7 @@ Optional properties:
>    case, the "idle" state needs to pull down the data and strobe pin
>    and the "active" state needs to pull up the strobe pin.
>  - pinctrl-n: alternate pin modes
> +- disable-runtime-pm: This disables the runtime power management.

This is a Linux feature, not h/w description or config.

>  
>  i.mx specific properties
>  - fsl,usbmisc: phandler of non-core register device, with one
> -- 
> 2.27.0
>