soc/intel/skylake: Prevent disabling of TCO

In Skylake/Kabylake, if ACPI PM timer is disabled then TCO also gets
disabled & vice versa.

FSP default config for EnableTcoTimer is disabled, this caused ACPI PM
timer & TCO to be disabled by FSP even when config PmTimerDisable = 0.

Thus update FSPS UPD EnableTcoTimer in accordance to devicetree config
PmTimerDisable.

BUG=None
TEST= Build for Soraka with PmTimerDisable=0 & check if TCO caused
reboot after running shell command: cat >> /dev/watchdog0

Change-Id: Ia146761036c9dbaef3c02c9a7122ae3dcdef7bdd
Signed-off-by: Naresh G Solanki <naresh.solanki@intel.com>
Reviewed-on: https://review.coreboot.org/29108
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-by: Rizwan Qureshi <rizwan.qureshi@intel.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/soc/intel/skylake/chip_fsp20.c b/src/soc/intel/skylake/chip_fsp20.c
index a2a430e695..7cc6de51f7 100644
--- a/src/soc/intel/skylake/chip_fsp20.c
+++ b/src/soc/intel/skylake/chip_fsp20.c
@@ -369,6 +369,7 @@ void platform_fsp_silicon_init_params_cb(FSPS_UPD *supd)
 	params->SataMode = config->SataMode;
 	params->SataSpeedLimit = config->SataSpeedLimit;
 	params->SataPwrOptEnable = config->SataPwrOptEnable;
+	params->EnableTcoTimer = !config->PmTimerDisabled;
 
 	tconfig->PchLockDownGlobalSmi = config->LockDownConfigGlobalSmi;
 	tconfig->PchLockDownRtcLock = config->LockDownConfigRtcLock;