On Thu, 27 Nov 2003, Mark Studebaker wrote: > The 2.6 i2c-dev bus numbers don't necessarily match i2c-adapter bus > numbers. > If you rmmod and re-insmod a bus driver, the driver seems to get its old > i2c-dev bus number back. But the i2c-adapter number increments. > Don't know why. It would be much better if they matched. In i2c-dev adapter gets the first empty minor device. In i2c-core, previously, adap->nr (bus number) was an index in the array of adapters so it also took the first empty slot. In 2.6 the array of adapters in i2c-core has been changed to a list and bus number is now just ever incrementing as you have noticed. The number was pretty dynamic anyway, as it depended of the order adapters were loaded. IMO, one should point to i2c bus by its parent device. That is, pick the i2c bus behind pci device ABAD:BEEF, the one in parallel port etc, sysfs should have this information. -- Ky?sti M?lkki <kyosti.malkki at welho.com> +358 50 462 8786
