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Date:   Wed, 16 Dec 2020 12:22:53 -0500
From:   Alan Stern <stern@...land.harvard.edu>
To:     Dmitry Osipenko <digetx@...il.com>
Cc:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Peter Chen <Peter.Chen@....com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Felipe Balbi <balbi@...nel.org>,
        Matt Merhar <mattmerhar@...tonmail.com>,
        Nicolas Chauvet <kwizart@...il.com>,
        Peter Geis <pgwipeout@...il.com>, linux-tegra@...r.kernel.org,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 7/8] usb: host: ehci-tegra: Remove the driver

On Wed, Dec 16, 2020 at 08:09:51PM +0300, Dmitry Osipenko wrote:
> 16.12.2020 19:45, Alan Stern пишет:
> > On Tue, Dec 15, 2020 at 11:21:12PM +0300, Dmitry Osipenko wrote:
> >> The ChipIdea driver now provides USB2 host mode support for NVIDIA Tegra
> >> SoCs. The ehci-tegra driver is obsolete now, remove it.
> >>
> >> Tested-by: Matt Merhar <mattmerhar@...tonmail.com>
> >> Tested-by: Nicolas Chauvet <kwizart@...il.com>
> >> Tested-by: Peter Geis <pgwipeout@...il.com>
> >> Signed-off-by: Dmitry Osipenko <digetx@...il.com>
> >> ---
> >>  drivers/usb/host/Kconfig      |   9 -
> >>  drivers/usb/host/Makefile     |   1 -
> >>  drivers/usb/host/ehci-tegra.c | 604 ----------------------------------
> >>  3 files changed, 614 deletions(-)
> >>  delete mode 100644 drivers/usb/host/ehci-tegra.c
> >>
> >> diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
> >> index 31e59309da1f..9c9e6ff9c43a 100644
> >> --- a/drivers/usb/host/Kconfig
> >> +++ b/drivers/usb/host/Kconfig
> >> @@ -266,15 +266,6 @@ config USB_EHCI_HCD_AT91
> >>  	  Enables support for the on-chip EHCI controller on
> >>  	  Atmel chips.
> >>  
> >> -config USB_EHCI_TEGRA
> >> -	tristate "NVIDIA Tegra HCD support"
> >> -	depends on ARCH_TEGRA
> >> -	select USB_EHCI_ROOT_HUB_TT
> >> -	select USB_TEGRA_PHY
> >> -	help
> >> -	  This driver enables support for the internal USB Host Controllers
> >> -	  found in NVIDIA Tegra SoCs. The controllers are EHCI compliant.
> > 
> > For people upgrading from earlier kernel versions, do you think it
> > would help to add a pointer here telling them which Kconfig option
> > they need to enable now in order to get this functionality?
> 
> Could you please clarify what do you mean by the "pointer"?

See the entries for USB_CNS3XXX_EHCI, USB_OCTEON_EHCI, 
USB_OHCI_HCD_OMAP3, and USB_OHCI_SH in that Kconfig file for examples.

Alan Stern

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