[coreboot-gerrit] Patch merged into coreboot/master: 2cb3e3b lynxpoint: Do not put SerialIO devices into D3Hot in ACPI mode

[gerrit at coreboot.org]

the following patch was just integrated into master:
commit 2cb3e3b828285dc7b390d7af1a2917bb9fa6af3f
Author: Duncan Laurie <dlaurie at chromium.org>
Date:   Tue Feb 11 10:34:06 2014 -0800

    lynxpoint: Do not put SerialIO devices into D3Hot in ACPI mode
    
    Remove the bit of code that was putting the SerialIO devices into
    D3Hot state when they are switched from PCI to ACPI mode.  Instead,
    add the appropriate ACPI Methods to allow the kernel to control the
    power state of the device.
    
    The problem seems to be that if the device is put in D3Hot state
    before it is switched from PCI to ACPI mode then it does not properly
    export its PCI configuration space and cannot be woken back up.
    
    Adding the ACPI Methods for _PS0/_PS3 allows the kernel to transition
    the device into D0 state only when it is necessary to communicate with
    the device, then put it back into D3Hot state.
    
    Change-Id: I2384ba10bf47750d1c1a35216169ddeee26881df
    Signed-off-by: Duncan Laurie <dlaurie at chromium.org>


See http://review.coreboot.org/5193 for details.

-gerrit