Re: [PATCH] arm64: dts: marvell: armada-37xx: drop 'marvell,usb-misc-reg' properties

[Gabor Juhos <j4g8y7@gmail.com>]

Hi Andrew,

2026. 03. 05. 14:28 keltezéssel, Andrew Lunn írta:
> On Thu, Mar 05, 2026 at 08:54:34AM +0100, Gregory CLEMENT wrote:
>> Hello Andrew,
>>
>>> On Wed, Mar 04, 2026 at 08:12:43PM +0100, Gabor Juhos wrote:
>>>> The 'marvell,usb-misc-reg' property is present both in the EHCI and
>>>> in the XHCI USB host device nodes, however it is not documented. Thus
>>>> 'make dtbs_check' produces warnings like these:
>>>>
>>>>   /arch/arm64/boot/dts/marvell/armada-3720-db.dtb: usb@58000 (marvell,armada3700-xhci): Unevaluated properties are not allowed ('marvell,usb-misc-reg' was unexpected)
>>>>           from schema $id: http://devicetree.org/schemas/usb/generic-xhci.yaml
>>>>   /arch/arm64/boot/dts/marvell/armada-3720-db.dtb: usb@5e000 (marvell,armada-3700-ehci): Unevaluated properties are not allowed ('marvell,usb-misc-reg' was unexpected)
>>>>           from schema $id: http://devicetree.org/schemas/usb/generic-ehci.yaml
>>>>
>>>> Apart from the fact that the properties are not documented, those are
>>>> not even used by any USB host drivers. At least 'git grep' says this:
>>>>
>>>>   $ git grep -n 'marvell.usb-misc-reg' v7.0-rc2
>>>>   v7.0-rc2:Documentation/devicetree/bindings/phy/marvell,armada-3700-utmi-phy.yaml:30:  marvell,usb-misc-reg:
>>>>   v7.0-rc2:Documentation/devicetree/bindings/phy/marvell,armada-3700-utmi-phy.yaml:41:  - marvell,usb-misc-reg
>>>>   v7.0-rc2:Documentation/devicetree/bindings/phy/marvell,armada-3700-utmi-phy.yaml:50:      marvell,usb-misc-reg = <&usb2_syscon>;
>>>>   v7.0-rc2:arch/arm64/boot/dts/marvell/armada-37xx.dtsi:372:                              marvell,usb-misc-reg = <&usb32_syscon>;
>>>>   v7.0-rc2:arch/arm64/boot/dts/marvell/armada-37xx.dtsi:383:                              marvell,usb-misc-reg = <&usb32_syscon>;
>>>>   v7.0-rc2:arch/arm64/boot/dts/marvell/armada-37xx.dtsi:396:                              marvell,usb-misc-reg = <&usb2_syscon>;
>>>>   v7.0-rc2:arch/arm64/boot/dts/marvell/armada-37xx.dtsi:406:                              marvell,usb-misc-reg = <&usb2_syscon>;
>>>>   v7.0-rc2:drivers/phy/marvell/phy-mvebu-a3700-utmi.c:231:                                                         "marvell,usb-misc-reg");
>>>
>>
>> I don't follow:
>>
>>> The phy-mvebu-a3700-utmi.c does use it, and does document it:
>>>
>>>   marvell,usb-misc-reg:
>>>     description:
>>>       Phandle on the "USB miscellaneous registers" shared region
>>>       covering registers related to both the host controller and
>>>       the PHY.
>>>     $ref: /schemas/types.yaml#/definitions/phandle
>>>
>>> And the patch which added the property to the USB nodes also added the
>>> PHY nodes.
>>>
>>> commit 05d168a56fae8ff50432d5dfe6e7423b989455a8
>>> Author: Miquel Raynal <miquel.raynal@bootlin.com>
>>> Date:   Tue Jan 29 10:36:34 2019 +0100
>>>
>>>     arm64: dts: marvell: armada-37xx: declare USB2 UTMI PHYs
>>>
>>
>> You stated that the property is used and was properly added.
> 
> I can understand your confusion. The commit message is not great. I
> had to read quite a bit of code to convince myself the change is
> correct.

> The property is used and documented in the Generic PHY driver,
> phy-mvebu-a3700-utmi.c. And the properties being removed are in USB
> nodes. The properties in the PHY node are not removed.
> 
> The properties in the USB node have never been used, as far as i can
> see.

Thank you for the review, and sorry about the confusing commit message. Perhaps
I should have skipped the 'git grep' part.

@Gregory: Shall I send a v2 with a reworded the commit message?

Regards,
Gabor