LinuxPPC-Dev Archive on lore.kernel.org
 help / color / Atom feed
From: Rob Herring <robh+dt@kernel.org>
To: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Cc: "Andrew Lunn" <andrew@lunn.ch>,
	"Linux USB List" <linux-usb@vger.kernel.org>,
	"Neil Armstrong" <narmstrong@baylibre.com>,
	"Tony Lindgren" <tony@atomide.com>,
	"Bjorn Andersson" <bjorn.andersson@linaro.org>,
	"Wei Xu" <xuwei5@hisilicon.com>,
	linux-samsung-soc <linux-samsung-soc@vger.kernel.org>,
	"Kevin Hilman" <khilman@baylibre.com>,
	"Gregory Clement" <gregory.clement@bootlin.com>,
	"Krzysztof Kozlowski" <krzk@kernel.org>,
	"Chen-Yu Tsai" <wens@csie.org>, "Kukjin Kim" <kgene@kernel.org>,
	"Andy Gross" <agross@kernel.org>,
	linux-arm-msm <linux-arm-msm@vger.kernel.org>,
	arcml <linux-snps-arc@lists.infradead.org>,
	"Sebastian Hesselbarth" <sebastian.hesselbarth@gmail.com>,
	devicetree@vger.kernel.org, "Jason Cooper" <jason@lakedaemon.net>,
	"Mathias Nyman" <mathias.nyman@intel.com>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"Lad Prabhakar" <prabhakar.mahadev-lad.rj@bp.renesas.com>,
	"Maxime Ripard" <mripard@kernel.org>,
	"Alexey Malahov" <Alexey.Malahov@baikalelectronics.ru>,
	"Santosh Shilimkar" <ssantosh@kernel.org>,
	linux-omap <linux-omap@vger.kernel.org>,
	linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
	"Roger Quadros" <rogerq@ti.com>,
	"Felipe Balbi" <balbi@kernel.org>,
	"open list:MIPS" <linux-mips@vger.kernel.org>,
	"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
	"Yoshihiro Shimoda" <yoshihiro.shimoda.uh@renesas.com>,
	linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
	"Patrice Chotard" <patrice.chotard@st.com>,
	"Serge Semin" <fancer.lancer@gmail.com>,
	"Li Yang" <leoyang.li@nxp.com>,
	"Manu Gautam" <mgautam@codeaurora.org>,
	"Benoît Cousson" <bcousson@baylibre.com>,
	"Shawn Guo" <shawnguo@kernel.org>,
	"Pavel Parkhomenko" <Pavel.Parkhomenko@baikalelectronics.ru>
Subject: Re: [PATCH 20/20] arch: dts: Fix DWC USB3 DT nodes name
Date: Wed, 14 Oct 2020 13:35:16 -0500
Message-ID: <CAL_JsqKNuYS1ojJMCx1whLgynz+cTZ-Hvxn5pEFJc_PUgA1hsg@mail.gmail.com> (raw)
In-Reply-To: <20201014143720.yny3jco5pkb7dr4b@mobilestation>

On Wed, Oct 14, 2020 at 9:37 AM Serge Semin
<Sergey.Semin@baikalelectronics.ru> wrote:
>
> 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.

I seriously doubt anyone is using the APM machines with DT (even ACPI
is somewhat doubtful). I say change them. Or remove the dts files and
see what happens. Either way it can always be reverted.

Rob

  reply index

Thread overview: 73+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-14 10:13 [PATCH 00/20] dt-bindings: usb: Add generic USB HCD, xHCI, DWC USB3 DT schema Serge Semin
2020-10-14 10:13 ` [PATCH 01/20] dt-bindings: usb: usb-hcd: Convert generic USB properties to " Serge Semin
2020-10-16 18:33   ` Rob Herring
2020-10-14 10:13 ` [PATCH 02/20] dt-bindings: usb: usb-hcd: Add "otg-rev" property restriction Serge Semin
2020-10-16 18:33   ` Rob Herring
2020-10-14 10:13 ` [PATCH 03/20] dt-bindings: usb: usb-hcd: Add "ulpi/serial/hsic" PHY types Serge Semin
2020-10-16 18:34   ` Rob Herring
2020-10-14 10:13 ` [PATCH 04/20] dt-bindings: usb: usb-hcd: Add "tpl-support" property Serge Semin
2020-10-14 13:27   ` Rob Herring
2020-10-14 17:27     ` Serge Semin
2020-10-16 15:44       ` Rob Herring
2020-10-16 18:47   ` Rob Herring
2020-10-14 10:13 ` [PATCH 05/20] dt-bindings: usb: usb-hcd: Add generic "usb-phy" property Serge Semin
2020-10-16 18:47   ` Rob Herring
2020-10-14 10:13 ` [PATCH 06/20] dt-bindings: usb: Convert xHCI bindings to DT schema Serge Semin
2020-10-16 18:49   ` Rob Herring
2020-10-14 10:13 ` [PATCH 07/20] dt-bindings: usb: xhci: Add Broadcom STB v2 compatible device Serge Semin
2020-10-15 16:39   ` Florian Fainelli
2020-10-16 18:49   ` Rob Herring
2020-10-14 10:13 ` [PATCH 08/20] dt-bindings: usb: renesas-xhci: Refer to the usb-xhci.yaml file Serge Semin
2020-10-16 18:50   ` Rob Herring
2020-10-20  4:42   ` Yoshihiro Shimoda
2020-10-14 10:13 ` [PATCH 09/20] dt-bindings: usb: Convert DWC USB3 bindings to DT schema Serge Semin
2020-10-14 13:32   ` Rob Herring
2020-10-14 17:37     ` Serge Semin
2020-10-14 10:13 ` [PATCH 10/20] dt-bindings: usb: dwc3: Add interrupt-names property support Serge Semin
2020-10-16 18:50   ` Rob Herring
2020-10-14 10:13 ` [PATCH 11/20] dt-bindings: usb: dwc3: Add synopsys, dwc3 compatible string Serge Semin
2020-10-14 20:18   ` [PATCH 11/20] dt-bindings: usb: dwc3: Add synopsys,dwc3 " Krzysztof Kozlowski
2020-10-14 21:35     ` Serge Semin
2020-10-16 18:53       ` Rob Herring
2020-10-19 16:22         ` Serge Semin
2020-10-14 10:13 ` [PATCH 12/20] dt-bindings: usb: dwc3: Add Tx De-emphasis restrictions Serge Semin
2020-10-16 18:54   ` Rob Herring
2020-10-14 10:13 ` [PATCH 13/20] dt-bindings: usb: dwc3: Add Frame Length Adj restrictions Serge Semin
2020-10-16 18:54   ` Rob Herring
2020-10-14 10:13 ` [PATCH 14/20] dt-bindings: usb: meson-g12a-usb: Fix FL-adj property value Serge Semin
2020-10-16 18:54   ` Rob Herring
2020-10-16 20:46   ` Martin Blumenstingl
2020-10-14 10:13 ` [PATCH 15/20] dt-bindings: usb: meson-g12a-usb: Validate DWC2/DWC3 sub-nodes Serge Semin
2020-10-16 18:54   ` Rob Herring
2020-10-16 20:47   ` Martin Blumenstingl
2020-10-14 10:13 ` [PATCH 16/20] dt-bindings: usb: keystone-dwc3: Validate DWC3 sub-node Serge Semin
2020-10-16 18:55   ` Rob Herring
2020-10-14 10:13 ` [PATCH 17/20] dt-bindings: usb: qcom,dwc3: " Serge Semin
2020-10-16 18:55   ` [PATCH 17/20] dt-bindings: usb: qcom, dwc3: " Rob Herring
2020-10-14 10:14 ` [PATCH 18/20] arch: dts: Fix EHCI/OHCI DT nodes name Serge Semin
2020-10-14 18:00   ` Florian Fainelli
2020-10-14 18:11     ` Serge Semin
2020-10-14 18:41       ` Florian Fainelli
2020-10-14 21:21         ` Serge Semin
2020-10-14 18:56   ` Paul Cercueil
2020-10-14 19:12     ` Alexey Brodkin
2020-10-15  8:05   ` Amelie DELAUNAY
2020-10-15 16:37   ` Florian Fainelli
2020-10-16  7:08   ` Alexandre Torgue
2020-10-16  8:52     ` Serge Semin
2020-10-14 10:14 ` [PATCH 19/20] arch: dts: Fix xHCI " Serge Semin
2020-10-14 10:14 ` [PATCH 20/20] arch: dts: Fix DWC USB3 " 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
2020-10-14 18:35       ` Rob Herring [this message]
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
2020-10-14 17:39 ` [PATCH 00/20] dt-bindings: usb: Add generic USB HCD, xHCI, DWC USB3 DT schema Serge Semin

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=CAL_JsqKNuYS1ojJMCx1whLgynz+cTZ-Hvxn5pEFJc_PUgA1hsg@mail.gmail.com \
    --to=robh+dt@kernel.org \
    --cc=Alexey.Malahov@baikalelectronics.ru \
    --cc=Pavel.Parkhomenko@baikalelectronics.ru \
    --cc=Sergey.Semin@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=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

LinuxPPC-Dev Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linuxppc-dev/0 linuxppc-dev/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linuxppc-dev linuxppc-dev/ https://lore.kernel.org/linuxppc-dev \
		linuxppc-dev@lists.ozlabs.org linuxppc-dev@ozlabs.org
	public-inbox-index linuxppc-dev

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.ozlabs.lists.linuxppc-dev


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git