On Sun, 18 May 2008, Atsushi Nemoto wrote: > I suppose the "off by one second" issue is not the matter each driver > should take care of. This race is common for most RTC chip. I agree, but with the reread it comes for free here. Given you have two values of seconds available here, which one would you choose? You can't take both at once. ;-) > I do not have strong opinion for optimization suggested by Jean. It > might be better, but I'm OK with current your patch. Hmm, it looks as simple as putting a clause like: if (i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_READ_I2C_BLOCK) break; into the loop and even at 400kHz it saves a considerable amount of time. It sounds plausible -- I'll do that. Maciej