diff options
| -rw-r--r-- | src/soc/intel/apollolake/pmutil.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/src/soc/intel/apollolake/pmutil.c b/src/soc/intel/apollolake/pmutil.c index dabc2683bc..aaa4018683 100644 --- a/src/soc/intel/apollolake/pmutil.c +++ b/src/soc/intel/apollolake/pmutil.c @@ -443,5 +443,12 @@ void vboot_platform_prepare_reboot(void) void poweroff(void) { enable_pm1_control(SLP_EN | (SLP_TYP_S5 << SLP_TYP_SHIFT)); - halt(); + + /* + * Setting SLP_TYP_S5 in PM1 triggers SLP_SMI, which is handled by SMM + * to transition to S5 state. If halt is called in SMM, then it prevents + * the SMI handler from being triggered and system never enters S5. + */ + if (!ENV_SMM) + halt(); } |