Re: [PATCH] Support FlashPro5 serial ports

[Andreas Messer <andi@bastelmap.de>]

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Am Fri, Oct 31, 2025 at 02:40:23PM +0100 schrieb Johan Hovold:
> On Thu, Oct 30, 2025 at 10:49:22PM +0100, Andreas Messer wrote:
> 
> > I have added more entries to the device list to make all UART Channels
> > working with my board. However it will make these UARTS show up with SF2+
> > Board too. I found at least four different device which have the 
> > same Vendor/Product ID, but I assume there are more:
> > 
> > - Trenz SMF2000: FT2232H
> >   Channel A -> JTAG, Channel B -> UART
> > 
> > - Microchip Polarfire Discovery Kit: FT4232H
> >   Channel A -> JTAG, Channel B/C/D -> UART
> 
> Where did you find these two? Do you have access to the devices?

For the Trenz I found the information in the web here:

https://wiki.trenz-electronic.de/display/PD/TEM0001+TRM

I own the Discovery Kit but the schematic is also public 
available here:

https://ww1.microchip.com/downloads/aemDocuments/documents/FPGA/ProductDocuments/BoardDesignFiles/PolarFire_SoC_Discovery_Kit_Schematics.zip


> > - Microsemi/Microchip FlashPro5: FT4232H
> >   Channel A -> JTAG
> 
> I guess you forgot "Channel B/C/D -> UART" here?

No, the standalone FlashPro5 hardware has only a JTAG Port

https://www.microchip.com/en-us/development-tool/flashpro5


> It would be good to avoid enabling unused ports on devices that only
> have one UART (e.g. to avoid regressing udev rules).
> 
> You could use something like ftdi_8u2232c_probe() and only enable the
> other ports (i.e. B and D) after comparing the product name to a
> whitelist.

Ok, I'll have a look at it and try to come with a solution. 
Thanks for the pointer!

Andreas

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