linux-kernel - Re: [PATCH V3 6/6] usb: host: Add ability to build new Broadcom STB USB drivers

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Date:   Tue, 6 Nov 2018 12:09:47 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     Al Cooper <alcooperx@...il.com>
Cc:     linux-kernel@...r.kernel.org,
        Alan Stern <stern@...land.harvard.edu>,
        Alban Bedel <albeu@...e.fr>, Alex Elder <elder@...aro.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Avi Fishman <avifishman70@...il.com>,
        bcm-kernel-feedback-list@...adcom.com,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Chunfeng Yun <chunfeng.yun@...iatek.com>,
        "David S. Miller" <davem@...emloft.net>,
        devicetree@...r.kernel.org, Dmitry Osipenko <digetx@...il.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>,
        Hans de Goede <hdegoede@...hat.com>,
        James Hogan <jhogan@...nel.org>,
        Jianguo Sun <sunjianguo1@...wei.com>,
        Johan Hovold <johan@...nel.org>,
        Kees Cook <keescook@...omium.org>, linux-usb@...r.kernel.org,
        Lu Baolu <baolu.lu@...ux.intel.com>,
        Mark Rutland <mark.rutland@....com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Mathias Nyman <mathias.nyman@...el.com>,
        Mathias Nyman <mathias.nyman@...ux.intel.com>,
        Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
        Rishabh Bhatnagar <rishabhb@...eaurora.org>,
        Rob Herring <robh+dt@...nel.org>, Roger Quadros <rogerq@...com>
Subject: Re: [PATCH V3 6/6] usb: host: Add ability to build new Broadcom STB
 USB drivers

On 11/5/18, Al Cooper <alcooperx@...il.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.

      Arnd