Enabling TPS65950 / TWL4030 Real-time clock functions

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Hi,
I am using a Gumstix Overo Earth (TI OMAP 3503) and this has a TPS69590/TWL4030 module, which I understand has a real-time clock subsystem.

Is there support in the linux 2.6.29 or 2.6.31 kernel for enabling the RTC functions? I would like to preserve the system data and time between reboots. I've seen a 32Khz RTC clock option in the linux kernel.

Is there a separate pin for a small battery just to keep supplying power to the RTC module?

Best regards,

Elvis

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