Messages in this thread | | | From | David Brownell <> | Subject | Re: RTC subsystem and fractions of seconds | Date | Sun, 7 Jan 2007 18:10:30 -0800 |
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On Sunday 07 January 2007 2:14 am, Philippe De Muyter wrote: > On Fri, Jan 05, 2007 at 07:49:00PM -0800, David Brownell wrote: > > > Those rtc's actually have a 1/100th of second > > > register. Should the generic rtc interface not support that? > > > > Are you implying a new userspace API, or just an in-kernel update? > > > > Either way, that raises the question of what other features should > > be included. What sub-second precision? Multiple alarms? Ways > > to manage output clocks? Sub-HZ periodic alarms? > > One usefull addition for my needs and with a m41t81 is the support of > the calibration of the rtc. However this can perhaps be hidden in the > .set_mmss function.
Doesn't seem like an set_mmss() mechanism at all. Some drivers give sysfs access to an oscillator "trim" mechanism. What tools do you have which track how far off that crystal is?
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