RE: [PATCH v3 0/9] initial usbdrd phy support for Exynosautov920 soc

["Pritam Manohar Sutar" <pritam.sutar@samsung.com>]

Hi Rob, 

> -----Original Message-----
> From: Rob Herring (Arm) <robh@kernel.org>
> Sent: 17 June 2025 03:17 AM
> To: Pritam Manohar Sutar <pritam.sutar@samsung.com>
> Cc: rosa.pila@samsung.com; s.nawrocki@samsung.com; linux-samsung-
> soc@vger.kernel.org; conor+dt@kernel.org; linux-kernel@vger.kernel.org;
> andre.draszik@linaro.org; linux-phy@lists.infradead.org; vkoul@kernel.org;
> krzk+dt@kernel.org; faraz.ata@samsung.com; selvarasu.g@samsung.com;
> kauschluss@disroot.org; ivo.ivanov.ivanov1@gmail.com;
> dev.tailor@samsung.com; devicetree@vger.kernel.org; kishon@kernel.org;
> peter.griffin@linaro.org; muhammed.ali@samsung.com; linux-arm-
> kernel@lists.infradead.org; alim.akhtar@samsung.com;
> m.szyprowski@samsung.com
> Subject: Re: [PATCH v3 0/9] initial usbdrd phy support for Exynosautov920
> soc
> 
> 
> On Fri, 13 Jun 2025 11:26:04 +0530, Pritam Manohar Sutar wrote:
> > This SoC has a single USB 3.1 DRD combo phy and three USB2.0 only DRD
> > phy controllers
> >
> >   - Combo phy supports USB3.1 SSP+(10Gbps) protocol and is backwards
> >     compatible to the USB3.0 SS(5Gbps). 'Add-on USB2.0' phy is added
> >     to support USB2.0 HS(480Mbps), FS(12Mbps) and LS(1.5Mbps) data
> >     rates. These two phys are combined to form a combo phy as mentioned
> >     below.
> >
> >    USB30DRD_0 port
> >
> >      +-----------------------------------------------------+
> >      |                                                     |
> >      |           (combo) USB PHY controller                |
> >      |     +-----------------------------------------+     |
> >      |     |               USB HSPHY                 |     |
> >      |     |  (samsung,exynosautov920-usbdrd-hsphy)  |     |
> >      |     +-----------------------------------------+     |
> >      |                                                     |
> >      |   +---------------------------------------------+   |
> >      |   |               USB SSPHY                     |   |
> >      |   |   (samsung,exynosautov920-usb31drd-ssphy)   |   |
> >      |   +---------------------------------------------+   |
> >      |                                                     |
> >      +-----------------------------------------------------+
> >      |                                                     |
> >      |                USBDRD30 Link                        |
> >      |                  Controller                         |
> >      |                                                     |
> >      +-----------------------------------------------------+
> >
> >   - USB2.0 phy supports only UTMI+ interface. USB2.0DRD phy
> >     is very similar to the existing Exynos850 support in this driver.
> >
> >     USB20DRD_0/1/2 ports
> >
> >
> >       +---------------------------------------------------+
> >       |                                                   |
> >       |                USB PHY controller                 |
> >       |    +-----------------------------------------+    |
> >       |    |              USB HSPHY                  |    |
> >       |    |  (samsung,exynosautov920-usbdrd-phy)    |    |
> >       |    +-----------------------------------------+    |
> >       |                                                   |
> >       +---------------------------------------------------+
> >       |                                                   |
> >       |             USBDRD20_* Link                       |
> >       |                Controller                         |
> >       |                                                   |
> >       +---------------------------------------------------+
> >
> > This patchset only supports device mode and same is verified with as
> > NCM device with below configfs commands
> >
> > changelog
> > ----------
> > Changes in v2:
> > - Used standard GENMASK() and FIELD_GET() to get the major version
> >   from controller version register.
> >   link for v1:
> > https://lore.kernel.org/linux-phy/20250514134813.380807-1-pritam.sutar
> > @samsung.com/
> >
> > Changes in v3:
> > - Updated dt-bindings for USB2.0 only.
> > - Added dt-bindings for combo phy.
> > - Added implementation for combo phy (SS and HS phy).
> > - Added added DTS nodes for all the phys.
> >   link for v2:
> > https://lore.kernel.org/linux-phy/20250516102650.2144487-1-pritam.suta
> > r@samsung.com/
> >
> > Pritam Manohar Sutar (9):
> >   dt-bindings: phy: samsung,usb3-drd-phy: add ExynosAutov920 HS phy
> >     compatible
> >   phy: exyons5-usbdrd: support HS phy for ExynosAutov920
> >   arm64: dts: exynos: ExynosAutov920: add USB and USB-phy nodes
> >   dt-bindings: phy: samsung,usb3-drd-phy: add ExynosAutov920 combo HS
> >     phy
> >   phy: exyons5-usbdrd: support HS combo phy for ExynosAutov920
> >   arm64: dts: exynos: ExynosAutov920: add USB and USB HS combo phy
> nodes
> >   dt-bindings: phy: samsung,usb3-drd-phy: add ExynosAutov920 combo SS
> >     phy
> >   phy: exyons5-usbdrd: support SS combo phy for ExynosAutov920
> >   arm64: dts: exynos: ExynosAutov920: add USB and USB SS combo phy
> > nodes
> >
> >  .../bindings/phy/samsung,usb3-drd-phy.yaml    |   6 +
> >  .../boot/dts/exynos/exynosautov920-sadk.dts   |  53 ++
> >  .../arm64/boot/dts/exynos/exynosautov920.dtsi | 155 +++++
> >  drivers/phy/samsung/phy-exynos5-usbdrd.c      | 529
> ++++++++++++++++++
> >  4 files changed, 743 insertions(+)
> >
> > --
> > 2.34.1
> >
> >
> >
> 
> 
> My bot found new DTB warnings on the .dts files added or changed in this
> series.
> 
> Some warnings may be from an existing SoC .dtsi. Or perhaps the warnings
> are fixed by another series. Ultimately, it is up to the platform maintainer
> whether these warnings are acceptable or not. No need to reply unless the
> platform maintainer has comments.
> 
> If you already ran DT checks and didn't see these error(s), then make sure dt-
> schema is up to date:
> 
>   pip3 install dtschema --upgrade
> 
> 
> This patch series was applied (using b4) to base:
>  Base: attempting to guess base-commit...
>  Base: tags/v6.16-rc1-6-g8a22d9e79cf0 (exact match)
> 
> If this is not the correct base, please add 'base-commit' tag (or use b4 which
> does this automatically)
> 
> New warnings running 'make CHECK_DTBS=y for
> arch/arm64/boot/dts/exynos/' for 20250613055613.866909-1-
> pritam.sutar@samsung.com:
> 
> arch/arm64/boot/dts/exynos/exynosautov920-sadk.dtb: usb@16600000
> (samsung,exynosautov920-dwusb3): 'vdd33-supply' is a required property
> 	from schema $id: https://protect2.fireeye.com/v1/url?k=a398ebb0-
> c213fe83-a39960ff-000babff9bb7-8d9cc7c90d9462da&q=1&e=59f25a9c-244f-
> 45e8-a7cb-
> 211aa2722987&u=http%3A%2F%2Fdevicetree.org%2Fschemas%2Fusb%2Fsa
> msung%2Cexynos-dwc3.yaml%23
> arch/arm64/boot/dts/exynos/exynosautov920-sadk.dtb: usb@16700000
> (samsung,exynosautov920-dwusb3): 'vdd33-supply' is a required property
> 	from schema $id: https://protect2.fireeye.com/v1/url?k=c803d102-
> a988c431-c8025a4d-000babff9bb7-2f005fe0951204df&q=1&e=59f25a9c-244f-
> 45e8-a7cb-
> 211aa2722987&u=http%3A%2F%2Fdevicetree.org%2Fschemas%2Fusb%2Fsa
> msung%2Cexynos-dwc3.yaml%23
> arch/arm64/boot/dts/exynos/exynosautov920-sadk.dtb: usb@16800000
> (samsung,exynosautov920-dwusb3): 'vdd33-supply' is a required property
> 	from schema $id: https://protect2.fireeye.com/v1/url?k=1f0616ff-
> 7e8d03cc-1f079db0-000babff9bb7-3473467f8f5ba11c&q=1&e=59f25a9c-244f-
> 45e8-a7cb-
> 211aa2722987&u=http%3A%2F%2Fdevicetree.org%2Fschemas%2Fusb%2Fsa
> msung%2Cexynos-dwc3.yaml%23
> arch/arm64/boot/dts/exynos/exynosautov920-sadk.dtb: usb@16900000
> (samsung,exynosautov920-dwusb3): 'vdd33-supply' is a required property
> 	from schema $id: https://protect2.fireeye.com/v1/url?k=989abcf3-
> f911a9c0-989b37bc-000babff9bb7-7f2e26e2d23d90b1&q=1&e=59f25a9c-
> 244f-45e8-a7cb-
> 211aa2722987&u=http%3A%2F%2Fdevicetree.org%2Fschemas%2Fusb%2Fsa
> msung%2Cexynos-dwc3.yaml%23
> 
> 
> 
> 
LDO regulators are always on. USB don’t control them for ExynosAutov920. Hence vdd33-supply is omitted from dts. 

Will try to add dummy regulator to add required field and patch will be updated in next version of the patch-set (v4)

Thank you, 

Regards,
Pritam



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