diff options
Diffstat (limited to 'src/soc/amd/stoneyridge/pmutil.c')
| -rw-r--r-- | src/soc/amd/stoneyridge/pmutil.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/src/soc/amd/stoneyridge/pmutil.c b/src/soc/amd/stoneyridge/pmutil.c index baabba5fbb..7e5e4dfe4b 100644 --- a/src/soc/amd/stoneyridge/pmutil.c +++ b/src/soc/amd/stoneyridge/pmutil.c @@ -32,3 +32,15 @@ int vboot_platform_is_resuming(void) return acpi_sleep_from_pm1(inw(pm_acpi_pm_cnt_blk())) == ACPI_S3; } + +/* If vboot requests a system reset, modify the PM1 register so it will never be + * misinterpreted as an S3 resume. */ +void vboot_platform_prepare_reboot(void) +{ + uint16_t pm1; + + pm1 = inw(pm_acpi_pm_cnt_blk()); + pm1 &= ~SLP_TYP; + pm1 |= SLP_TYP_S5 << SLP_TYP_SHIFT; + outw(pm1, pm_acpi_pm_cnt_blk()); +} |