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Date:   Mon, 18 Mar 2019 14:27:35 +0100
From:   Neil Armstrong <narmstrong@...libre.com>
To:     gregkh@...uxfoundation.org, hminas@...opsys.com, balbi@...nel.org,
        kishon@...com
Cc:     linux-amlogic@...ts.infradead.org, linux-usb@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 0/8] arm64: meson: Add support for USB on Amlogic G12A

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

Neil

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