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intel/apollolake: Do not halt in poweroff if in SMM 

Calling halt in poweroff when in SMM prevents SLP_SMI to be triggered
preventing the system from entering sleep state. Fix this by calling
halt only if ENV_SMM is not true.

BUG=chrome-os-partner:56395
BRANCH=None
TEST=Verified lidclose behavior on reef.

Change-Id: If116c8f4e867543abdc2ff235457c167b5073767
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/16257
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
This commit is contained in:
Furquan Shaikh 2016-08-18 21:31:50 -07:00
parent 200f11eb87
commit 3828e55a8c
1 changed files with 8 additions and 1 deletions
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7
src/soc/intel/apollolake/pmutil.c
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@ -443,5 +443,12 @@ void vboot_platform_prepare_reboot(void)
void poweroff(void)
{
enable_pm1_control(SLP_EN | (SLP_TYP_S5 << SLP_TYP_SHIFT));
/*
* 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();
}