Bonjour Gerard, On Thu, 16 Dec 2010 09:20:00 -0500, Gerard Pierre wrote: > Being relatively new to i2c I wanted to verify that my conclusion > reached from doing some initial reading on i2c device detection is > accurate: > > Based on the nature of an i2c bus there is no automatic detection of > an i2c device "plugged into" a system in the kernel. For example, an > embedded Linux system boots up and 10 minutes later someone attaches a > smart battery to the running system (to a bus that also has a smart > battery charger, for example) - there is no way to automatically > detect the device and run some initialization code in a device driver > every time the battery gets connected to the i2c bus, correct?
Correct. You'll need a side-band mechanism for the notification. For example, inserting the battery could push on a switch, triggering an interrupt. An alternative would be to poll continuously for the slave I2C address of the battery, but that would be horrible performance-wise and thus better avoided. -- Jean Delvare -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
