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Date:   Wed, 20 Dec 2017 16:40:08 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Felipe Balbi <balbi@...nel.org>,
        Alan Stern <stern@...land.harvard.edu>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Thierry Reding <thierry.reding@...il.com>
Cc:     kbuild test robot <lkp@...el.com>, kbuild-all@...org,
        linux-usb@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 3/4] usb: phy: Add Kconfig entry for Tegra PHY driver

On 20.12.2017 16:17, kbuild test robot wrote:
> Hi Dmitry,
> 
> Thank you for the patch! Yet something to improve:
> 
> [auto build test ERROR on balbi-usb/next]
> [also build test ERROR on v4.15-rc4 next-20171220]
> [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
> 
> url:    https://github.com/0day-ci/linux/commits/Dmitry-Osipenko/usb-phy-tegra-Cleanup-error-messages/20171220-142227
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb.git next
> config: arm-tegra_defconfig (attached as .config)
> compiler: arm-linux-gnueabi-gcc (Debian 7.2.0-11) 7.2.0
> reproduce:
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # save the attached .config to linux build tree
>         make.cross ARCH=arm 
> 
> All errors (new ones prefixed by >>):
> 
>    drivers/usb/host/ehci-tegra.o: In function `tegra_ehci_hub_control':
>>> ehci-tegra.c:(.text+0x818): undefined reference to `tegra_usb_phy_preresume'
>>> ehci-tegra.c:(.text+0x9b4): undefined reference to `tegra_usb_phy_postresume'

So there is actual build-dependency on the PHY for ehci-tegra and I haven't
tested it properly. That's not good.

Would it be fine to extend the generic PHY with pre/postresume restore_start/end
functions?

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