soc/intel/cannonlake: Enable power button smi in pre-OS
This change enables user to shutdown the system by shortly pressing
power button (<10sec) before OS is loaded. Main use case is shutdown
from recovery/broken screen.
BUG=N/A
TEST=Boot up into recovery screen on Sarien platform, press power button
once, and system should shutdown immediatelly.
Change-Id: I7655daf65ff058df7d9bad4567f74b4f4007acb4
Signed-off-by: Krzysztof Sywula <krzysztof.m.sywula@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/31894
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Lijian Zhao <lijian.zhao@intel.com>
Reviewed-by: Furquan Shaikh <furquan@google.com>
diff --git a/src/soc/intel/cannonlake/pmc.c b/src/soc/intel/cannonlake/pmc.c
index 931c4af..5cd31f9 100644
--- a/src/soc/intel/cannonlake/pmc.c
+++ b/src/soc/intel/cannonlake/pmc.c
@@ -62,6 +62,21 @@
pmc_set_afterg3(PCH_DEV_PMC, CONFIG_MAINBOARD_POWER_FAILURE_STATE);
}
+static void pm1_enable_pwrbtn_smi(void *unused)
+{
+ /*
+ * Enable power button SMI only before jumping to payload. This ensures
+ * that:
+ * 1. Power button SMI is enabled only after coreboot is done.
+ * 2. On resume path, power button SMI is not enabled and thus avoids
+ * any shutdowns because of power button presses due to power button
+ * press in resume path.
+ */
+ pmc_update_pm1_enable(PWRBTN_EN);
+}
+
+BOOT_STATE_INIT_ENTRY(BS_PAYLOAD_LOAD, BS_ON_EXIT, pm1_enable_pwrbtn_smi, NULL);
+
static void config_deep_sX(uint32_t offset, uint32_t mask, int sx, int enable)
{
uint32_t reg;