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Date:   Thu, 17 Dec 2020 14:25:47 +0100
From:   Thierry Reding <thierry.reding@gmail.com>
To:     Dmitry Osipenko <digetx@gmail.com>
Cc:     Jonathan Hunter <jonathanh@nvidia.com>,
        Peter Chen <Peter.Chen@nxp.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Alan Stern <stern@rowland.harvard.edu>,
        Felipe Balbi <balbi@kernel.org>,
        Matt Merhar <mattmerhar@protonmail.com>,
        Nicolas Chauvet <kwizart@gmail.com>,
        Peter Geis <pgwipeout@gmail.com>,
        Ion Agorria <ion@agorria.com>, linux-tegra@vger.kernel.org,
        linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 1/8] usb: phy: tegra: Add delay after power up
Message-ID: <X9tcW+kKOimoOrOl@ulmo>
References: <20201217094007.19336-1-digetx@gmail.com>
 <20201217094007.19336-2-digetx@gmail.com>
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On Thu, Dec 17, 2020 at 12:40:00PM +0300, Dmitry Osipenko wrote:
> The PHY hardware needs the delay of 2ms after power up, otherwise initial
> interrupt may be lost if USB controller is accessed before PHY is settled
> down. Previously this issue was masked by implicit delays, but now it pops
> up after squashing the older ehci-tegra driver into the ChipIdea driver.
>=20
> Tested-by: Matt Merhar <mattmerhar@protonmail.com>
> Tested-by: Nicolas Chauvet <kwizart@gmail.com>
> Tested-by: Peter Geis <pgwipeout@gmail.com>
> Tested-by: Ion Agorria <ion@agorria.com>
> Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
> ---
>  drivers/usb/phy/phy-tegra-usb.c | 3 +++
>  1 file changed, 3 insertions(+)

Acked-by: Thierry Reding <treding@nvidia.com>

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