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Hi, maybe someone has already done this, but attached is a RTC driver for the DS1685/1687 RTC chip. The main driver is platform-independent code at drivers/rtc/rtc-ds1685.c and /include/linux/ds1685.h. As usual, it requires a platform_device be registered by platform-specific code. The driver allows the platform to define its own read/write access to the chip via platform_data functions. If those are not implemented, the driver assumes the RTC chip is directly accessible via readb/writeb. Attached is patch against 2.6.21-ts.jun102008. The DS1687 on the TS7800 is accessible indirectly via an indexed addressing mode, so the patch includes platform_data for accessing the chip. I tested this on the TS7800 with hwclock and it works fine, I can set and read the clock, although some of the 242 bytes of NVRAM are not accessible for some reason which I'm looking into. Steve __._,_.___
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