[RFC] Option to disable mapping genrtc calls to ppc_md calls
ebs at ebshome.net
Wed Jan 19 05:54:19 EST 2005
On Tue, Jan 18, 2005 at 11:25:33AM -0500, Dan Malek wrote:
> There are three reasons. You don't want to use an I2c rtc clock at
> all in these functions because they get can get called from the
> clock interrupt to update the time in the rtc. If it does happen to
> it creates long latencies in the timer interrupt. If the i2c requires
> interrupt, they system will crash or hang.
> A system using an I2C RTC should find some way to access the
> clock from application space as a standard I2C device and manage
> time/clock from the application, not from the kernel.
Well, it was discussed numerous times before with solutions how to use
i2c based RTC as well.
I use i2c RTC which requires interrupt and guess what, my kernel
doesn't crash when timer_interrupt calls ppc_md.set_rtc_time.
It's just a matter of writing correct i2c RTC driver.
Dan, please, stop spreading "i2c-RTC" FUD :).
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