On Wed, Jul 06, 2011 at 12:16:03PM +0100, Russell King - ARM Linux wrote: > On Wed, Jul 06, 2011 at 12:05:48PM +0100, Catalin Marinas wrote: > > On Wed, Jul 06, 2011 at 11:14:56AM +0100, Russell King - ARM Linux wrote: > > > Do we know why the calibration was initially introduced? FWIR, it came > > > from the SMP group in ARM, so I guess they had a reason for it rather > > > than copying x86. > > > > I think it was introduced because the TWD frequency is half of the CPU > > frequency but the latter may not be known - boot monitor configuration > > could change it. > > Okay, that implies we can't have a fixed frequency built into the kernel > then. For such platforms like the ARM dev boards (realview + vexpress), > I expect we can read the CPU frequency from somewhere like one of the > ICST PLLs. That's highly platform dependent and it's not just ARM dev boards. Any board with ARM11MPCore, Cortex-A9 or Cortex-A5 would need to find a way to retrieve such information. If anyone is prepared to go through each board and figure out how to get the information, it's fine by me. -- Catalin -- To unsubscribe from this list: send the line "unsubscribe linux-watchdog" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
