I am using a custom HW design very similar to the Leopardboard 368 but with a battery circuit for the RTC. The RTC is enabled by setting RTC_DRV_DAVINCI=y in the RidgeRun SDK. The RTC configured this way works intermittently if there is a power cycle. It looks like the RTC drain on the battery is about 4.8mA which may be the source of the issue. I would expect around 1uA based on typical ARM low power modes. The HW design is exactly what is recommended in the TI data sheets. Todd Fischer at RidgeRun seems to think there is a known silicon defect in the subsystem that contains the built in RTC but I couldn't find anything on the RTC in the TMS320DM368 Silicon Errata at http://www.ti.com/lit/er/sprz316b/sprz316b.pdf. Am I looking in the wrong place for the RTC errata? Is this a known issues? Is there a workaround? Is there a problem with the RTC_DRV_DAVINCI linux driver? Is there a recent patch for the RTC_DRV_DAVINCI linux driver?
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