On 20.12.2023 21:45, Wolfram Sang wrote: > On Wed, Nov 08, 2023 at 07:38:07AM +0100, Heiner Kallweit wrote: >> Legacy class-based device auto-detection shouldn't be used in new code. >> Therefore remove support in i2c-mux-reg as long as we don't have a >> user of this feature yet. >> >> Link: https://lore.kernel.org/linux-i2c/a22978a4-88e4-46f4-b71c-032b22321599@xxxxxxxxx/ >> Signed-off-by: Heiner Kallweit <hkallweit1@xxxxxxxxx> > > Applied to for-next, thanks! > > I guess i2c-mux-gpio is more difficult because it has users already? > Right. i801 has a special handling for certain Asus server models with > 8 memory slots where the smbus to the SPD eeproms is gpio-muxed. I2C_CLASS_HWMON is passed to the child adapters to probe for DIMM thermal sensors. For getting rid of the class-based probing we have to: - Extend i2c_register_spd() for use on muxed smbus segments. Then i2c_register_spd() instantiates at24 to handle the SPD eeprom (for DDR3) - at24 then checks the SPD for an advertised thermal sensor, and instantiates jc42 to handle the thermal sensor -> a patch for this has been submitted The extension of i2c_register_spd() needs some more thoughts.
