linux-kernel - Re: [PATCH 15/18] dt-bindings: usb: meson-g12a-usb: Discard FL-adj property

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Date:   Mon, 12 Oct 2020 09:54:25 +0200
From:   Neil Armstrong <narmstrong@...libre.com>
To:     Serge Semin <Sergey.Semin@...kalelectronics.ru>,
        Mathias Nyman <mathias.nyman@...el.com>,
        Felipe Balbi <balbi@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rob Herring <robh+dt@...nel.org>,
        Kevin Hilman <khilman@...libre.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Cc:     Serge Semin <fancer.lancer@...il.com>,
        Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>,
        Pavel Parkhomenko <Pavel.Parkhomenko@...kalelectronics.ru>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Manu Gautam <mgautam@...eaurora.org>,
        Roger Quadros <rogerq@...com>,
        Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
        linux-usb@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-amlogic@...ts.infradead.org
Subject: Re: [PATCH 15/18] dt-bindings: usb: meson-g12a-usb: Discard FL-adj
 property

Hi,

On 11/10/2020 00:41, Serge Semin wrote:
> An empty snps,quirk-frame-length-adjustment won't cause any change
> performed by the driver. Moreover the DT schema validation will fail,
> since it expects the property being assigned with some value. So just
> discard the property declaration then from the example.
> 
> Signed-off-by: Serge Semin <Sergey.Semin@...kalelectronics.ru>
> 
> ---
> 
> Note the same problem is in the DT source file
> arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi .
> ---
>  .../devicetree/bindings/usb/amlogic,meson-g12a-usb-ctrl.yaml     | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/usb/amlogic,meson-g12a-usb-ctrl.yaml b/Documentation/devicetree/bindings/usb/amlogic,meson-g12a-usb-ctrl.yaml
> index 5b04a7dfa018..88184d7e26cc 100644
> --- a/Documentation/devicetree/bindings/usb/amlogic,meson-g12a-usb-ctrl.yaml
> +++ b/Documentation/devicetree/bindings/usb/amlogic,meson-g12a-usb-ctrl.yaml
> @@ -209,6 +209,5 @@ examples:
>                interrupts = <30>;
>                dr_mode = "host";
>                snps,dis_u2_susphy_quirk;
> -              snps,quirk-frame-length-adjustment;
>            };
>      };
> 

Thanks for reporting this, actually the fladj must be 0x20 on this hw,
but we do set this on the PHY side, so we can let the dwc3 side 0 here.

Acked-by: Neil Armstrong <narmstrong@...libre.com>

Neil