linux-kernel - Re: [PATCH 2/3] usb: host: xhci-plat: Add device property to set XHCI_SKIP_PHY

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Date:   Sat, 30 Oct 2021 10:58:25 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Sandeep Maheswaram <quic_c_sanm@...cinc.com>
Cc:     Rob Herring <robh+dt@...nel.org>, Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Felipe Balbi <balbi@...nel.org>,
        Stephen Boyd <swboyd@...omium.org>,
        Doug Anderson <dianders@...omium.org>,
        Matthias Kaehlcke <mka@...omium.org>,
        Mathias Nyman <mathias.nyman@...el.com>,
        devicetree@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        quic_pkondeti@...cinc.com, quic_ppratap@...cinc.com
Subject: Re: [PATCH 2/3] usb: host: xhci-plat: Add device property to set
 XHCI_SKIP_PHY_INIT quirk

On Tue, Oct 26, 2021 at 11:49:31PM +0530, Sandeep Maheswaram wrote:
> Add device property usb-skip-phy-init to check and set XHCI_SKIP_PHY_INIT
> quirk.
> 
> Signed-off-by: Sandeep Maheswaram <quic_c_sanm@...cinc.com>
> ---
>  drivers/usb/host/xhci-plat.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
> index c1edcc9..2a45f89 100644
> --- a/drivers/usb/host/xhci-plat.c
> +++ b/drivers/usb/host/xhci-plat.c
> @@ -323,6 +323,9 @@ static int xhci_plat_probe(struct platform_device *pdev)
>  		if (device_property_read_bool(tmpdev, "quirk-broken-port-ped"))
>  			xhci->quirks |= XHCI_BROKEN_PORT_PED;
>  
> +		if (device_property_read_bool(tmpdev, "usb-skip-phy-init"))
> +			xhci->quirks |= XHCI_SKIP_PHY_INIT;
> +

Why is this needed?  What will it fix?

You need more information.

thanks,
greg k-h