Messages in this thread | | | Date | Wed, 2 Sep 2009 00:22:14 +0200 | Subject | Re: Montreal Linux Power Management Mini-Summit, July 13, 2009 - Meeting Notes | From | Linus Walleij <> |
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2009/7/31 Len Brown <lenb@kernel.org>:
> A Linux Power Management "mini-summit" was held on July 13th, 2009 - > on the first day of the Montreal Linux Symposium. > (...)
> SH running cpufreq on top of clock framework > cpufreq has notifiers, clock framework does not
Hm! Paul can you elaborate on what that was about.
I've felt a need for clock notifiers and we've cheated by using CPUfreq because it so happens that the clocking in system-wide and whenever the CPU freq change so may the other clocks.
But if I put code into a PrimeCell MMC/SPI/I2C driver or whatever and use CPUfreq that's very unelegant, and for other platforms where the CPU freq don't change when this particular device clk freq change plain misleading.
A clk pre/postchange notifier pair would really help and would make for elegant drivers that can handle clock freq transitions.
Has anyone poked at this?
Linus Walleij -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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