Messages in this thread |  | | Date | Mon, 18 Dec 2017 13:17:50 -0700 | From | Jason Gunthorpe <> | Subject | Re: [BISECTED] tpm CLKRUN breaks PS/2 keyboard and touchpad on Braswell system |
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On Mon, Dec 18, 2017 at 08:29:30PM +0100, Javier Martinez Canillas wrote:
> My knowledge of LPC is near to non-existent so I please forgive me if I'm wrong, > but my understanding is that it's the opposite of what you said. > > When CLKRUN_EN is SET, power management is ENABLED on the LPC bus and the host > LCLK clock may be stopped when entering in some low-power states. > > The CLKRUN# signal is then used by peripherals to restart the LCLK clock after > resuming from low-power states to be able to transmit again. > > When CLKRUN_EN is CLEAR, power management is DISABLED on the LPC bus and the > host LCLK clock is never stopped even when entering in some low-power states.
Okay, that makes sense.
Jason
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