diff options
| author | Tobias Diedrich <ranma+openocd@tdiedrich.de> | 2017-02-10 00:28:45 +0100 |
|---|---|---|
| committer | Duncan Laurie <dlaurie@chromium.org> | 2017-02-14 18:59:30 +0100 |
| commit | 36537f113cf38f3b29cf5a51d563e8278f4683d8 (patch) | |
| tree | 2b9f9a9ac744d5d0791fe77969e87681717c07ce /src/drivers/pc80/tpm | |
| parent | 03e9d6aa13f474ab980779366b7a6c8593721be6 (diff) | |
| download | coreboot-36537f113cf38f3b29cf5a51d563e8278f4683d8.tar.xz | |
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>
Diffstat (limited to 'src/drivers/pc80/tpm')
| -rw-r--r-- | src/drivers/pc80/tpm/tpm.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/drivers/pc80/tpm/tpm.c b/src/drivers/pc80/tpm/tpm.c index 83dc92348f..3c3e491aa3 100644 --- a/src/drivers/pc80/tpm/tpm.c +++ b/src/drivers/pc80/tpm/tpm.c @@ -876,7 +876,7 @@ static void lpc_tpm_fill_ssdt(struct device *dev) CONFIG_TPM_TIS_BASE_ADDRESS, 0x5000); if (!path) { - path = "PCI0.LPCB"; + path = "\\_SB_.PCI0.LPCB"; printk(BIOS_DEBUG, "Using default TPM ACPI path: '%s'\n", path); } |