[PATCH v3 0/4] P2040/P2041 i2c recovery erratum

wsa at kernel.org wsa at kernel.org
Thu May 13 01:01:18 AEST 2021

> > I've been doing my recent work with a P2040 and prior to that I did test 
> > out the recovery on a T2081 (which isn't documented to have this 
> > erratum) when I was re-working the driver. The "new" recovery actually 
> > seems better but I don't have a reliably faulty i2c device so that's 
> > only based on me writing some code to manually trigger the recovery 
> > (using the snippet below) and observing it with an oscilloscope.
> You don't need a faulty device, just an aborted I2C read/write op.

If you can wire GPIOs to the bus, you can use the I2C fault injector:


There are already two "incomplete transfer" injectors.

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 833 bytes
Desc: not available
URL: <http://lists.ozlabs.org/pipermail/linuxppc-dev/attachments/20210512/4fd238ad/attachment.sig>

More information about the Linuxppc-dev mailing list