diff options
Diffstat (limited to 'src/soc/intel/skylake')
| -rw-r--r-- | src/soc/intel/skylake/pmc.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/src/soc/intel/skylake/pmc.c b/src/soc/intel/skylake/pmc.c index a2623d953d1c..6b673bebd92a 100644 --- a/src/soc/intel/skylake/pmc.c +++ b/src/soc/intel/skylake/pmc.c @@ -225,4 +225,29 @@ static void pm1_enable_pwrbtn_smi(void *unused) BOOT_STATE_INIT_ENTRY(BS_PAYLOAD_LOAD, BS_ON_EXIT, pm1_enable_pwrbtn_smi, NULL); +/* + * Check if WAKE# pin is enabled based on DSX_EN_WAKE_PIN setting in + * deep_sx_config. If WAKE# pin is not enabled, then PCI Express Wake Disable + * bit needs to be set in PM1_EN to avoid unnecessary wakes caused by WAKE# + * pin. + */ +static void pm1_handle_wake_pin(void *unused) +{ + struct device *dev = SA_DEV_ROOT; + + if (!dev || !dev->chip_info) + return; + + const config_t *conf = dev->chip_info; + + /* If WAKE# pin is enabled, bail out early. */ + if (conf->deep_sx_config & DSX_EN_WAKE_PIN) + return; + + pmc_update_pm1_enable(PCIEXPWAK_DIS); +} + +BOOT_STATE_INIT_ENTRY(BS_PAYLOAD_LOAD, BS_ON_EXIT, pm1_handle_wake_pin, NULL); +BOOT_STATE_INIT_ENTRY(BS_OS_RESUME, BS_ON_EXIT, pm1_handle_wake_pin, NULL); + #endif |