On Thu, 25 Aug 2011 13:30:02 -0400, Matt Turner <mattst88@xxxxxxxxx> wrote: > I looked through the datasheet and tried to find a place where we're > doing something wrong in the driver, but I didn't see anything. > > http://www.datasheetcatalog.com/datasheets_pdf/M/4/1/T/M41T80.shtml Excuse me for slow response. As you and John discovered, this driver do not support alarm completely. This driver just can set/read alarm date/time, but RTC interrupt is not implemented yet. So possible solutions would be: * Implement RTC irq handler. (Now we have threaded-irq so it would be easier than the past) * Drop .set_alarm function. (i.e. drop whole alarm codes) I cannot test this driver by myself, but I will take a look if you had any fix. Thank you. --- Atsushi Nemoto