Re: [PATCH 5/6] RTC: SMBus support for the M41T80, etc. driver (#2)

["Maciej W. Rozycki" <macro@linux-mips.org>]

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