On Fri, Sep 13, 2024 at 10:36:43AM +0000, Wojciech Siudy (Nokia) wrote: > From: Wojciech Siudy <wojciech.siudy@xxxxxxxxx> > > The pca954x mux might not respond under certain cicumstances, like device behind > it holding SDA after recovery loop or some internal issue in mux itself. Those > situations are indicated by ETIMEDOUT returned from I2C transaction attempting > selecting or deselecting the channel. According to device documentation the > reset pulse restores I2C subsystem of the mux and deselects the channel. > > Since the mux switches using transistors, the failure of line behind mux that > is currently conneted prevents sending commands to mux itself, so external reset > signal is required. > > The following series of patches implements the reset functionality if it was > selected in devicetree, beceuse the reset line might not be dedivated in some > applications and such reset pulse would break other chips. FYI, something went a bit wrong with this series, and it has not been threaded correctly. How did you send it?
Attachment:
signature.asc
Description: PGP signature
