On Tuesday 09 December 2008, Alessandro Zummo wrote: > On Sun, 7 Dec 2008 11:59:39 -0800 David Brownell wrote: > > > Simple RTC driver for the MSP430 firmware on the DM355 EVM board. > > Other than not supporting atomic reads/writes of all four bytes, > > this is quite reasonable as a basic no-alarm RTC. > > Ok. This reminds me of that rtc-firmware thingy... I'll have to > think about that.
Seems very different to me! Board-specific. The rtc-firmware thingy evolved from rtc-ppc, which ISTR is a migration wrapper for a powerpc-only RTC framework. In this case there's no such framework. ARM's <asm/rtc.h> is gone, too, and that is what enabled the PPC rtc-firmware driver ... The MSP430 is accessed through I2C, and RTC functionality is just one of several things it's been programmed to handle[1]. Think of it as just like any other RTC you talk to over RTC, but it's implemented by a field-customizible ASIC. ;) - Dave [1] http://c6000.spectrumdigital.com/evmdm355/revd/ Almost at the bottom of that page, the "MSP430 Register definitions" pdf summarizes the I2C protocol requests implemented by that firmware. Firmware source is downloadable from that page, so the board can be updated if you want the remote control to power the board up, or alarm, or whatever. _______________________________________________ Davinci-linux-open-source mailing list [email protected] http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
