diff options
| -rw-r--r-- | src/southbridge/intel/common/pmclib.c | 28 |
1 files changed, 11 insertions, 17 deletions
diff --git a/src/southbridge/intel/common/pmclib.c b/src/southbridge/intel/common/pmclib.c index 5bc0ef141a..34a449b2b3 100644 --- a/src/southbridge/intel/common/pmclib.c +++ b/src/southbridge/intel/common/pmclib.c @@ -1,5 +1,6 @@ /* SPDX-License-Identifier: GPL-2.0-only */ +#include <bootmode.h> #include <stdint.h> #include <acpi/acpi.h> #include <console/console.h> @@ -8,31 +9,24 @@ #include "pmbase.h" #include "pmutil.h" -int southbridge_detect_s3_resume(void) +static void clear_power_state(void) { - u32 pm1_cnt; - u16 pm1_sts; - int is_s3 = 0; + uint32_t pm1_cnt = read_pmbase32(PM1_CNT); + write_pmbase32(PM1_CNT, pm1_cnt & ~SLP_TYP); +} - /* Check PM1_STS[15] to see if we are waking from Sx */ - pm1_sts = read_pmbase16(PM1_STS); - if (pm1_sts & WAK_STS) { - /* Read PM1_CNT[12:10] to determine which Sx state */ - pm1_cnt = read_pmbase32(PM1_CNT); - if (((pm1_cnt >> 10) & 7) == SLP_TYP_S3) { - /* Clear SLP_TYPE. */ - write_pmbase32(PM1_CNT, pm1_cnt & ~(7 << 10)); - is_s3 = 1; - } - } - if (is_s3) { +int southbridge_detect_s3_resume(void) +{ + if (platform_is_resuming()) { + clear_power_state(); if (!acpi_s3_resume_allowed()) { printk(BIOS_DEBUG, "SB: Resume from S3 detected, but disabled.\n"); return 0; } printk(BIOS_DEBUG, "SB: Resume from S3 detected.\n"); + return 1; } - return is_s3; + return 0; } |