linux-kernel - Re: [PATCH v3 2/3] dt-bindings: usb: cdns,usb3: Add cdns,phyrst-a-enable property

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Message-ID: <1b45d695-0874-69c7-8398-5d14033f0788@gmail.com>
Date:   Tue, 15 Sep 2020 19:15:10 +0300
From:   Sergei Shtylyov <sergei.shtylyov@...il.com>
To:     Roger Quadros <rogerq@...com>, balbi@...nel.org
Cc:     pawell@...ence.com, kurahul@...ence.com, nsekhar@...com,
        vigneshr@...com, robh+dt@...nel.org, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v3 2/3] dt-bindings: usb: cdns,usb3: Add
 cdns,phyrst-a-enable property

Hello!

On 9/15/20 2:45 PM, Roger Quadros wrote:

> Controller version 0x0002450D has USB2 PHY RX sensitivity issues
> that needs to be worked around by enabling phyrst-a-enable bit
> in PHYRST_CFG register.
> 
> There is no way to know controller version before device controller
> is started and the workaround needs to be applied for both host and
> device modes, so we add this DT property.
> 
> Signed-off-by: Roger Quadros <rogerq@...com>
> Acked-by: Rob Herring <robh@...nel.org>
> ---
>  Documentation/devicetree/bindings/usb/cdns,usb3.yaml | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/usb/cdns,usb3.yaml b/Documentation/devicetree/bindings/usb/cdns,usb3.yaml
> index 9b14c8443d39..ac20b98e9910 100644
> --- a/Documentation/devicetree/bindings/usb/cdns,usb3.yaml
> +++ b/Documentation/devicetree/bindings/usb/cdns,usb3.yaml
> @@ -61,6 +61,10 @@ properties:
>        buffers expressed in KB
>      $ref: /schemas/types.yaml#/definitions/uint32
>  
> +  cdns,phyrst-a-enable:
> +    description: Enable resetting of PHY if Rx fail is detected

   Failure?

[...]

MBR, Sergei