linux-kernel - Re: [PATCH v3 0/8] arm64: meson: Add support for USB on Amlogic G12A

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Date:   Mon, 18 Mar 2019 20:41:38 +0100
From:   Martin Blumenstingl <martin.blumenstingl@...glemail.com>
To:     Neil Armstrong <narmstrong@...libre.com>
Cc:     gregkh@...uxfoundation.org, hminas@...opsys.com, balbi@...nel.org,
        kishon@...com, linux-amlogic@...ts.infradead.org,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v3 0/8] arm64: meson: Add support for USB on Amlogic G12A

Hi Neil,

On Mon, Mar 18, 2019 at 2:29 PM Neil Armstrong <narmstrong@...libre.com> wrote:
>
> On 18/03/2019 11:11, Neil Armstrong wrote:
> > This patchset adds support for USB on Amlogic G12A SoCs.
> >
> > This patchset is composed with :
> > - bindings of the PHYs
> > - bindings of the USB Control Glue
> > - PHY Drivers
> > - USB Control Glue driver
> >
> > Device Tree nodes will be added in a separate patchset.
> >
> > The Amlogic G12A USB Complex is composed of :
> > - 2 USB Controllers :
> >  * DWC3 for USB2 and USB3 Host functionality
> >  * DWC2 for USB2 Peripheral functionality
> > - 2 USB2 OTG PHYs, only a single one will be routed to either DWC2 to DWC3
> > - 1 USB3 PHY shared with PCIE funcionnality
> > - A Glue to control PHY routing, setup and OTG detection
> >
> > The Glue configures the UTMI 8bit interfaces for the USB2 PHYs, including
> > routing of the OTG PHY between the DWC3 and DWC2 controllers, and
> > setups the on-chip OTG mode selection for this PHY.
> >
> > This drivers supports the on-probe setup of the OTG mode, and manually
> > via the USB Role interface. The IRQ mode change detect is yet to be added
> > in a future patchset, mainly due to lack of hardware to validate on.
> >
>
> Resent with USB2 PHY registers documented
awesome, thank you very much for this!


Regards
Martin