Hello Andreas, On 7/7/19 11:01 PM, Uwe Kleine-König wrote: > Hello, > > On 7/7/19 10:58 PM, Uwe Kleine-König wrote: >> From: Andreas Kemnade <andreas@xxxxxxxxxxxx> >> >> If the si2157 is behind a e.g. si2168, the si2157 will >> at least in some situations not be readable after the si268 >> got the command 0101. It still accepts commands but the answer >> is just ffffff. So read the chip id before that so the >> information is not lost. >> >> The following line in kernel output is a symptome >> of that problem: >> si2157 7-0063: unknown chip version Si21255-\xffffffff\xffffffff\xffffffff >> >> Signed-off-by: Andreas Kemnade <andreas@xxxxxxxxxxxx> I wonder if you (or anyone else here reading this mail) has access to the datasheets of the involved chips? (i.e. si2168, si2157) I'd like to try understanding and eventually fix the addressed problem here properly. Best regards Uwe
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