linux-kernel - Re: [PATCH v17 7/7] usb: Specify dependencies on USB_XHCI

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Message-ID: <YbvSNta4jCxizaTa@google.com>
Date:   Thu, 16 Dec 2021 15:56:38 -0800
From:   Matthias Kaehlcke <mka@...omium.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Alan Stern <stern@...land.harvard.edu>,
        Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Mathias Nyman <mathias.nyman@...el.com>,
        Felipe Balbi <balbi@...nel.org>
Cc:     linux-kernel@...r.kernel.org,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Stephen Boyd <swboyd@...omium.org>,
        Peter Chen <peter.chen@...nel.org>, linux-usb@...r.kernel.org,
        devicetree@...r.kernel.org,
        Douglas Anderson <dianders@...omium.org>,
        Roger Quadros <rogerq@...nel.org>,
        Michal Simek <michal.simek@...inx.com>,
        Ravi Chandra Sadineni <ravisadineni@...omium.org>,
        Bastien Nocera <hadess@...ess.net>,
        Andrew Lunn <andrew@...n.ch>,
        Aswath Govindraju <a-govindraju@...com>,
        Dmitry Osipenko <digetx@...il.com>,
        Gregory Clement <gregory.clement@...tlin.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        Lukas Bulwahn <lukas.bulwahn@...il.com>,
        Pawel Laszczak <pawell@...ence.com>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Tony Lindgren <tony@...mide.com>,
        linux-arm-kernel@...ts.infradead.org, linux-omap@...r.kernel.org,
        linux-samsung-soc@...r.kernel.org
Subject: Re: [PATCH v17 7/7] usb: Specify dependencies on USB_XHCI_PLATFORM
 with 'depends on'

On Tue, Nov 16, 2021 at 12:07:39PM -0800, Matthias Kaehlcke wrote:
> Some USB controller drivers that depend on the xhci-plat driver
> specify this dependency using 'select' in Kconfig. This is not
> recommended for symbols that have other dependencies as it may
> lead to invalid configurations. Use 'depends on' to specify the
> dependency instead of 'select'.
> 
> For dwc3 specify the dependency on USB_XHCI_PLATFORM in
> USB_DWC3_HOST and USB_DWC3_DUAL_ROLE. Also adjust the
> dependencies of USB_DWC3_CORE to make sure that at least one
> of USB_DWC3_HOST, USB_DWC3_GADGET or USB_DWC3_DUAL_ROLE can be
> selected.
> 
> Signed-off-by: Matthias Kaehlcke <mka@...omium.org>
> Reviewed-by: Roger Quadros <rogerq@...nel.org>
> Reviewed-by: Douglas Anderson <dianders@...omium.org>

Note: This patch has been removed from the onboard_usb_hub series,
together with "ARM: configs: Explicitly enable USB_XHCI_PLATFORM
where needed" and "arm64: defconfig: Explicitly enable
USB_XHCI_PLATFORM". These patches aren't any longer needed for the
series. If maintainers think they are useful independently from
the series please pick them or let me know what needs to be
changed to get them landed.