Dear Sebastian Hesselbarth, On Wed, 25 Jun 2014 16:08:44 +0200, Sebastian Hesselbarth wrote: > This *RFC* adds a driver stub for ChipIdea USB dual role controllers > found on Marvell MVEBU SoCs. Although, I consider this driver quite > finished, the corresponding DT binding is not. Also, we currently > have no corresponding driver in Linux for both MVEBU CI stub and > USB PHY. Very nice! Definitely great to see some work being done on the USB support, including the PHY initialization. > The reason I send it here and now, is to get some input from the > (Linux) MVEBU guys on the binding and functional tests on Armada XP. I'll try to have a look when time permits. > While we happily lived some years with ehci-orion ignoring usb-phys > and no usb device support at all on Linux, the situation for barebox > is different, of course. For a boot loader, we desperately need > usb-phy setup (and fixup) and proper DT bindings. Generally speaking, the Linux support for Armada 370/XP relies a lot on specific initialization done by the Marvell U-Boot, especially in terms of USB PHY, PCIe link initialization or SERDES configuration. One of my goal when starting Armada 370/XP support in Barebox was to start with a pristine state, and see what is missing in Linux. > I decided to just add the new binding style to the three board dts > overlays we have for barebox. If we are all happy with it, I'd start > implementing the required Linux driver for usb-phy and CI stub with > mbus setup. As usual, binding docs are missing but I think it is > straight forward from what we know of other SoCs/PHYs already. Indeed, Linux support for the USB gadget side would be useful. > USB host has been tested on all three board obviously, I plan to > test USB device on Dove D3Plug which has an USB device jack, but > similar patches for Marvell Berlin (also CI) worked fine. I think I should be able to test USB device on some of the development boards, I'll have to check. Thanks! Thomas -- Thomas Petazzoni, CTO, Free Electrons Embedded Linux, Kernel and Android engineering http://free-electrons.com _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
