* Richard Röjfors wrote: > On 09-06-15 20.10, Trilok Soni wrote: > > Hi, > > > > On Mon, Jun 15, 2009 at 8:39 PM, Richard > > Röjfors<[email protected]> wrote: > >> Supplied is a driver for the TSC2003. There is actually a driver for > >> TSC2007 which can be used in some cases. > >> The platform struct is reused from the TSC2007. > >> There is a big difference in the implementation between the drivers, this > >> one does not use HR timers. > >> The TSC2007 driver performs synchronous I2C in the timer callback (SW IRQ > >> context) which is bad when > >> the I2C driver is interrupt driven. > >> > > > > Meaning? I think I2C transaction can sleep. > > Yes that's what it means, and that's bad in a HR timer callback.
Note that my patch to the tsc2007 to support the tsc2003 exactly fixes this problem. It moves the actual I2C transfers into a workqueue, so no sleeping functions are called from the hrtimer callback. Thierry -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
