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From: Maxime Ripard <maxime@cerno.tech>
To: Felipe Balbi <balbi@kernel.org>
Cc: "Andrew Lunn" <andrew@lunn.ch>,
	linux-usb@vger.kernel.org,
	"Neil Armstrong" <narmstrong@baylibre.com>,
	"Tony Lindgren" <tony@atomide.com>,
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	"Alexey Malahov" <Alexey.Malahov@baikalelectronics.ru>,
	"Rob Herring" <robh+dt@kernel.org>,
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	"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
	"Yoshihiro Shimoda" <yoshihiro.shimoda.uh@renesas.com>,
	linuxppc-dev@lists.ozlabs.org,
	"Patrice Chotard" <patrice.chotard@st.com>,
	"Serge Semin" <fancer.lancer@gmail.com>,
	"Li Yang" <leoyang.li@nxp.com>,
	"Serge Semin" <Sergey.Semin@baikalelectronics.ru>,
	"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: Thu, 15 Oct 2020 16:04:54 +0200
Message-ID: <20201015140454.mctkhgkhegwdnfxk@gilmour.lan> (raw)
In-Reply-To: <875z7blrqu.fsf@kernel.org>


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On Thu, Oct 15, 2020 at 01:15:37PM +0300, Felipe Balbi wrote:
> Serge Semin <Sergey.Semin@baikalelectronics.ru> writes:
> 
> > 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,
> 
> in Dual-role or host-only builds, that's correct. We can also have
> peripheral-only builds (both SW or HW versions) which means xhci isn't
> even in the picture.

It doesn't really matter though, or at least it does for what the new
name might be, but the old one currently used is still pretty bad.

The DT spec says that the node name is the class of the device. "usb" as
the HCD binding mandates is one, but the current nodes currently have
completely different names from one DT to another - which is already an
issue - and most of them have dwc3 or some variant of it, which doesn't
really qualify for a class name.

Maxime

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  parent 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
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 [this message]
2020-10-14 17:39 ` [PATCH 00/20] dt-bindings: usb: Add generic USB HCD, xHCI, DWC USB3 DT schema Serge Semin

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