Messages in this thread | | | Date | Wed, 1 Mar 2023 12:37:27 +0000 | From | Mark Brown <> | Subject | Re: [Patch V5 2/3] tpm_tis-spi: Support hardware wait polling |
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On Wed, Mar 01, 2023 at 08:27:45AM -0400, Jason Gunthorpe wrote: > On Wed, Mar 01, 2023 at 11:56:53AM +0000, Krishna Yarlagadda wrote:
> > TPM device connected behind half duplex controller can only work > > this way. So, no additional flag needed to check.
> Just because a DT hooks it up this way doesn't mean the kernel driver > can support it, eg support hasn't been implemented in an older SPI > driver or something.
> If the failure mode is anything other than the TPM doesn't probe we > will need to check for support.
It's not like these buses are hot pluggable - someone would have to design and manufacture a board which doesn't work. It's probably reasonable for this to fail with the SPI subsystem saying it can't support things when the operation is tried. [unhandled content-type:application/pgp-signature] | |