drivers/pc80/tpm: Update default acpi path
The existing default path of PCI0.LPCB is missing the \_SB prefix and prevents Linux from detecting the TPM.
This is assuming that normally the LPCB device is most commonly on \_SB.PCI0.LPCB.
SSDT excerpt without the patch:
"""
DefinitionBlock ("", "SSDT", 2, "CORE ", "COREBOOT", 0x0000002A)
{
External (_SB_.PCI0.GFX0, DeviceObj)
[...]
External (_SB_.PCI0.SATA, DeviceObj)
External (PCI0.LPCB, DeviceObj)
[...]
Scope (PCI0.LPCB)
{
Device (TPM)
[...]
Scope (\_SB.PCI0.GFX0)
{
Method (_DOD, 0, NotSerialized) // _DOD: Display Output Devices
[...]
"""
SSDT excerpt with the patch:
"""
DefinitionBlock ("", "SSDT", 2, "CORE ", "COREBOOT", 0x0000002A)
{
External (_SB_.PCI0.GFX0, DeviceObj)
[...]
External (_SB_.PCI0.LPCB, DeviceObj)
[...]
External (_SB_.PCI0.SATA, DeviceObj)
[...]
Scope (\_SB.PCI0.LPCB)
{
Device (TPM)
[...]
Scope (\_SB.PCI0.GFX0)
{
Method (_DOD, 0, NotSerialized) // _DOD: Display Output Devices
[...]
"""
After the patch the TPM shows up in /sys/bus/acpi/devices/PNP0C31:00.
Previously it was missing and not detected by the kernel.
Change-Id: I615b4873ca829a859211403c84234d43d60f2243
Signed-off-by: Tobias Diedrich <ranma+coreboot@tdiedrich.de>
Reviewed-on: https://review.coreboot.org/18315
Tested-by: build bot (Jenkins)
Reviewed-by: Nicola Corna <nicola@corna.info>
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
36537f113c