Nicolas, The polling TPS6507x touchscreen driver works without error (just uses 2% of the CPU). It is the hw design when using the I2C silicon module in the L138 that has the problem.
Todd On Thu, 2010-07-29 at 09:18 -0400, Nicolas Luna wrote: > Todd, > > > > Is it possible that the problem occurs because the driver is using > polling and it polls the PMIC to fast and it cannot handles all > commands received so it returns NACK? > > > Thanks > > > Nicolas > > > > On Thu, Jul 29, 2010 at 8:24 AM, Nicolas Luna <[email protected]> > wrote: > > Todd, > > > > Yes the polling is not such a problem because 2% is not that > much. Probably that the bitbang will be more than that it's > why I would like to avoid it. If there is a hardware mod to > correct NACK problem I'll be glad to apply it. > > > Thanks, > > > Nicolas > > > > > > > > > On Thu, Jul 29, 2010 at 7:43 AM, Todd Fischer > <[email protected]> wrote: > > Nicolas, > > Also, due to another hardware limitation, the touch > screen driver using polling instead of interrupts. I > heard a hardware change that will allow for interrupts > to be used is planned as well. The polling overhead > costs around 2% ARM CPU. > > Todd > > > > > On Thu, 2010-07-29 at 10:42 +0530, Nori, Sekhar > wrote: > > > Hi Nicolas, > > > > On Thu, Jul 29, 2010 at 02:16:16, Nicolas Luna wrote: > > > Todd, > > > > > > What do I need to change if I want to use the bitbang i2c > driver and > > > stop to get those error messages. > > > > You can try the patch here: > http://arago-project.org/git/projects/?p=linux-omapl1.git;a=commit;h=7d8accda275fdbe6e727e7ac02ae5a92f5695326 > > > > This issue should be fixed in future revisions of Logic > EVMs so this patch > > wont be needed afterward. > > > > Thanks, > > Sekhar > > > > > >
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