From: Serge Semin <Sergey.Semin@baikalelectronics.ru>
To: Felipe Balbi <balbi@kernel.org>
Cc: "Serge Semin" <fancer.lancer@gmail.com>,
"Mathias Nyman" <mathias.nyman@intel.com>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
"Rob Herring" <robh+dt@kernel.org>,
"Jason Cooper" <jason@lakedaemon.net>,
"Andrew Lunn" <andrew@lunn.ch>,
"Gregory Clement" <gregory.clement@bootlin.com>,
"Sebastian Hesselbarth" <sebastian.hesselbarth@gmail.com>,
"Kukjin Kim" <kgene@kernel.org>,
"Krzysztof Kozlowski" <krzk@kernel.org>,
"Santosh Shilimkar" <ssantosh@kernel.org>,
"Shawn Guo" <shawnguo@kernel.org>, "Li Yang" <leoyang.li@nxp.com>,
"Benoît Cousson" <bcousson@baylibre.com>,
"Tony Lindgren" <tony@atomide.com>,
"Patrice Chotard" <patrice.chotard@st.com>,
"Maxime Ripard" <mripard@kernel.org>,
"Chen-Yu Tsai" <wens@csie.org>, "Wei Xu" <xuwei5@hisilicon.com>,
"Andy Gross" <agross@kernel.org>,
"Bjorn Andersson" <bjorn.andersson@linaro.org>,
"Alexey Malahov" <Alexey.Malahov@baikalelectronics.ru>,
"Pavel Parkhomenko" <Pavel.Parkhomenko@baikalelectronics.ru>,
"Manu Gautam" <mgautam@codeaurora.org>,
"Roger Quadros" <rogerq@ti.com>,
"Lad Prabhakar" <prabhakar.mahadev-lad.rj@bp.renesas.com>,
"Yoshihiro Shimoda" <yoshihiro.shimoda.uh@renesas.com>,
"Neil Armstrong" <narmstrong@baylibre.com>,
"Kevin Hilman" <khilman@baylibre.com>,
linux-arm-kernel@lists.infradead.org,
linux-snps-arc@lists.infradead.org, linux-mips@vger.kernel.org,
linuxppc-dev@lists.ozlabs.org, linux-usb@vger.kernel.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-samsung-soc@vger.kernel.org, linux-omap@vger.kernel.org,
linux-arm-msm@vger.kernel.org
Subject: Re: [PATCH 20/20] arch: dts: Fix DWC USB3 DT nodes name
Date: Wed, 14 Oct 2020 17:37:20 +0300 [thread overview]
Message-ID: <20201014143720.yny3jco5pkb7dr4b@mobilestation> (raw)
In-Reply-To: <878sc8lx0e.fsf@kernel.org>
On Wed, Oct 14, 2020 at 05:09:37PM +0300, Felipe Balbi wrote:
>
> Hi Serge,
>
> Serge Semin <Sergey.Semin@baikalelectronics.ru> writes:
> > In accordance with the DWC USB3 bindings the corresponding node name is
> > suppose to comply with Generic USB HCD DT schema, which requires the USB
>
> DWC3 is not a simple HDC, though.
Yeah, strictly speaking it is equipped with a lot of vendor-specific stuff,
which are tuned by the DWC USB3 driver in the kernel. But after that the
controller is registered as xhci-hcd device so it's serviced by the xHCI driver,
which then registers the HCD device so the corresponding DT node is supposed
to be compatible with the next bindings: usb/usb-hcd.yaml, usb/usb-xhci.yaml
and usb/snps,dwc3,yaml. I've created the later one so to validate the denoted
compatibility.
>
> > nodes to have the name acceptable by the regexp: "^usb(@.*)?" . But a lot
> > of the DWC USB3-compatible nodes defined in the ARM/ARM64 DTS files have
> > name as "^dwc3@.*" or "^usb[1-3]@.*" or even "^dwusb@.*", which will cause
> > the dtbs_check procedure failure. Let's fix the nodes naming to be
> > compatible with the DWC USB3 DT schema to make dtbs_check happy.
> >
> > Note we don't change the DWC USB3-compatible nodes names of
> > arch/arm64/boot/dts/apm/{apm-storm.dtsi,apm-shadowcat.dtsi} since the
> > in-source comment says that the nodes name need to be preserved as
> > "^dwusb@.*" for some backward compatibility.
>
> interesting, compatibility with what? Some debugfs files, perhaps? :-)
Don't really know.) In my experience the worst type of such compatibility is
connected with some bootloader magic, which may add/remove/modify properties
to nodes with pre-defined names.
-Sergey
>
> In any case, I don't have any problems with this, so I'll let other
> folks comment.
>
> --
> balbi
next prev parent reply other threads:[~2020-10-14 14:37 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20201014101402.18271-1-Sergey.Semin@baikalelectronics.ru>
2020-10-14 10:13 ` [PATCH 17/20] dt-bindings: usb: qcom,dwc3: Validate DWC3 sub-node Serge Semin
2020-10-16 18:55 ` Rob Herring
2020-10-14 10:14 ` [PATCH 20/20] arch: dts: Fix DWC USB3 DT nodes name Serge Semin
2020-10-14 10:33 ` Krzysztof Kozlowski
2020-10-14 17:16 ` Serge Semin
2020-10-14 20:04 ` Krzysztof Kozlowski
2020-10-14 23:51 ` Serge Semin
2020-10-15 6:14 ` Krzysztof Kozlowski
2020-10-15 14:15 ` Serge Semin
2020-10-14 14:09 ` Felipe Balbi
2020-10-14 14:37 ` Serge Semin [this message]
2020-10-14 18:35 ` Rob Herring
2020-10-14 21:22 ` Serge Semin
2020-10-15 10:15 ` Felipe Balbi
2020-10-15 13:53 ` Serge Semin
2020-10-15 14:04 ` Maxime Ripard
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20201014143720.yny3jco5pkb7dr4b@mobilestation \
--to=sergey.semin@baikalelectronics.ru \
--cc=Alexey.Malahov@baikalelectronics.ru \
--cc=Pavel.Parkhomenko@baikalelectronics.ru \
--cc=agross@kernel.org \
--cc=andrew@lunn.ch \
--cc=balbi@kernel.org \
--cc=bcousson@baylibre.com \
--cc=bjorn.andersson@linaro.org \
--cc=devicetree@vger.kernel.org \
--cc=fancer.lancer@gmail.com \
--cc=gregkh@linuxfoundation.org \
--cc=gregory.clement@bootlin.com \
--cc=jason@lakedaemon.net \
--cc=kgene@kernel.org \
--cc=khilman@baylibre.com \
--cc=krzk@kernel.org \
--cc=leoyang.li@nxp.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-arm-msm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mips@vger.kernel.org \
--cc=linux-omap@vger.kernel.org \
--cc=linux-samsung-soc@vger.kernel.org \
--cc=linux-snps-arc@lists.infradead.org \
--cc=linux-usb@vger.kernel.org \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=mathias.nyman@intel.com \
--cc=mgautam@codeaurora.org \
--cc=mripard@kernel.org \
--cc=narmstrong@baylibre.com \
--cc=patrice.chotard@st.com \
--cc=prabhakar.mahadev-lad.rj@bp.renesas.com \
--cc=robh+dt@kernel.org \
--cc=rogerq@ti.com \
--cc=sebastian.hesselbarth@gmail.com \
--cc=shawnguo@kernel.org \
--cc=ssantosh@kernel.org \
--cc=tony@atomide.com \
--cc=wens@csie.org \
--cc=xuwei5@hisilicon.com \
--cc=yoshihiro.shimoda.uh@renesas.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).