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Re: [PATCH] hw/arm: ast2400/ast2500: Wire up EHCI controllers

From: Joel Stanley
Subject: Re: [PATCH] hw/arm: ast2400/ast2500: Wire up EHCI controllers
Date: Fri, 7 Feb 2020 13:09:16 +0000

On Fri, 7 Feb 2020 at 12:58, Guenter Roeck <address@hidden> wrote:
> On 2/7/20 12:16 AM, Cédric Le Goater wrote:
> > On 2/6/20 7:34 PM, Guenter Roeck wrote:
> >> Initialize EHCI controllers on AST2400 and AST2500 using the existing
> >> TYPE_PLATFORM_EHCI. After this change, booting ast2500-evb into Linux
> >> successfully instantiates a USB interface.
> >>
> >> ehci-platform 1e6a3000.usb: EHCI Host Controller
> >> ehci-platform 1e6a3000.usb: new USB bus registered, assigned bus number 1
> >> ehci-platform 1e6a3000.usb: irq 21, io mem 0x1e6a3000
> >> ehci-platform 1e6a3000.usb: USB 2.0 started, EHCI 1.00
> >> usb usb1: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 
> >> 5.05
> >> usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
> >> usb usb1: Product: EHCI Host Controller
> >
> > Cool. Have you tried to plug any devices ?
> >
> Yes, booting from USB drive works just fine. I already added it to my
> test suite at kerneltests.org.


Reviewed-by: Joel Stanley <address@hidden>

> > This looks good. Could you add the AST2600 also ?
> >
> I thought about that, but how would I test it ? None of the ast2600
> systems in the Linux kernel enables it. The devicetree include file for
> ast2600 doesn't even have an entry for it. I could cook something up,
> but that would not reflect real hardware.

FYI, there are patches on the linux-aspeed list to enable USB:


They have not yet been merged into the kernel, but I will merge the
device tree changes once -rc1 is out.

(I don't see any patches that enable the driver though, so I'll have
to follow that up with Tao)



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