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From:   Alan Cooper <alcooperx@gmail.com>
Date:   Tue, 6 Nov 2018 14:33:04 -0500
Message-ID: <CAOGqxeVC0atR0neerxLNDbHWgpuXYCVUW0YLhHxvQzDO0CHWZw@mail.gmail.com>
Subject: Re: [PATCH V3 6/6] usb: host: Add ability to build new Broadcom STB
 USB drivers
To:     Arnd Bergmann <arnd@arndb.de>
Cc:     ": Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>,
        Alan Stern <stern@rowland.harvard.edu>,
        Alban Bedel <albeu@free.fr>, Alex Elder <elder@linaro.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Avi Fishman <avifishman70@gmail.com>,
        bcm-kernel-feedback-list@broadcom.com,
        Bjorn Andersson <bjorn.andersson@linaro.org>,
        chunfeng yun <chunfeng.yun@mediatek.com>,
        "David S. Miller" <davem@davemloft.net>,
        DTML <devicetree@vger.kernel.org>,
        Dmitry Osipenko <digetx@gmail.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        "Gustavo A. R. Silva" <gustavo@embeddedor.com>,
        Hans de Goede <hdegoede@redhat.com>,
        James Hogan <jhogan@kernel.org>,
        Johan Hovold <johan@kernel.org>,
        Kees Cook <keescook@chromium.org>,
        USB list <linux-usb@vger.kernel.org>,
        Lu Baolu <baolu.lu@linux.intel.com>,
        Mark Rutland <mark.rutland@arm.com>,
        Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
        Mathias Nyman <mathias.nyman@intel.com>,
        Mathias Nyman <mathias.nyman@linux.intel.com>,
        Mauro Carvalho Chehab <mchehab+samsung@kernel.org>,
        Rishabh Bhatnagar <rishabhb@codeaurora.org>,
        Rob Herring <robh+dt@kernel.org>, Roger Quadros <rogerq@ti.com>
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On Tue, Nov 6, 2018 at 1:22 PM Arnd Bergmann <arnd@arndb.de> wrote:
>
> On 11/6/18, Alan Cooper <alcooperx@gmail.com> wrote:
> > On Tue, Nov 6, 2018 at 6:09 AM Arnd Bergmann <arnd@arndb.de> wrote:
> >>
> >> On 11/5/18, Al Cooper <alcooperx@gmail.com> wrote:
> >>
> >> > +
> >> > +config USB_BRCM
> >> > +     tristate "Broadcom STB USB support"
> >> > +     depends on ARCH_BRCMSTB
> >> > +     select USB_OHCI_HCD_PLATFORM if USB_OHCI_HCD
> >> > +     select USB_EHCI_BRCM if USB_EHCI_HCD
> >> > +     select USB_XHCI_BRCM if USB_XHCI_HCD
> >> > +     select USB_XHCI_PLATFORM if USB_XHCI_HCD
> >> > +     select BRCM_USB_PHY if USB_OHCI_HCD || USB_EHCI_HCD ||
> >> > USB_XHCI_HCD
> >> > +     select GENERIC_PHY if BRCM_USB_PHY
> >> > +     default ARCH_BRCMSTB
> >>
> >> Is there a build time dependency on the PHY layer? If not, I would
> >> suggest
> >> dropping the last two 'select' statements. I would also suggest
> >> making the dependency 'depends on ARCH_BRCMSTB || COMPILE_TEST'
> >> to allow building it on other architecture for better build testing, and
> >> dropping the 'default' line. Just add this to the defconfig like the
> >> other
> >> drivers you have.
> >
> > I added COMPILE_TEST and dropped the last 2 select lines.
> > Most of our other drivers default to "y" for "ARCH_BRCMSTB", would it
> > be better if I changed it to "default y"?
>
> No, "default ARCH_BRCMSTB" is better than "default y", but I'd recommend
> to just not have non-essential drivers default-on.
>
>       Arnd

Okay.

Thanks
Al