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| author | Haridhar Kalvala <haridhar.kalvala@intel.com> | 2018-06-07 10:52:31 +0530 |
|---|---|---|
| committer | Furquan Shaikh <furquan@google.com> | 2018-06-08 23:37:19 +0000 |
| commit | 1cedc7e40f31a0874ed59a58efe95c215317c255 (patch) | |
| tree | 4ef6ace0ee1ce0414c1f2048c68b658635214e49 /src/soc/intel | |
| parent | 4ca3a8abfa6456142520f3d53241167730b5fadc (diff) | |
| download | coreboot-1cedc7e40f31a0874ed59a58efe95c215317c255.tar.xz | |
soc/intel/skylake: Enable low power S0Idle capability
This patch sets the ACPI FADT flag ACPI_FADT_LOW_POWER_S0
if S0ix is enabled for the platform.
BUG=b:79559085
TEST= Boot to OS and check the ACPI_FADT_LOW_PWR_IDLE_S0
flag is set in FACP table - FADT.Flags[21] bit.
Change-Id: I0b8a86118232a66e7466d5b8116eff6087b51210
Signed-off-by: Haridhar Kalvala <haridhar.kalvala@intel.com>
Signed-off-by: Rajneesh Bhardwaj <rajneesh.bhardwaj@intel.com>
Reviewed-on: https://review.coreboot.org/26940
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Naresh Solanki <naresh.solanki@intel.com>
Diffstat (limited to 'src/soc/intel')
| -rw-r--r-- | src/soc/intel/skylake/acpi.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/soc/intel/skylake/acpi.c b/src/soc/intel/skylake/acpi.c index be1200b681..cc8f43725b 100644 --- a/src/soc/intel/skylake/acpi.c +++ b/src/soc/intel/skylake/acpi.c @@ -234,6 +234,8 @@ unsigned long acpi_fill_madt(unsigned long current) void acpi_fill_fadt(acpi_fadt_t *fadt) { + const struct device *dev = SA_DEV_ROOT; + const config_t *config = dev ? dev->chip_info : NULL; const uint16_t pmbase = ACPI_BASE_ADDRESS; /* Use ACPI 3.0 revision */ @@ -282,6 +284,9 @@ void acpi_fill_fadt(acpi_fadt_t *fadt) ACPI_FADT_RESET_REGISTER | ACPI_FADT_SEALED_CASE | ACPI_FADT_S4_RTC_WAKE | ACPI_FADT_PLATFORM_CLOCK; + if (config && config->s0ix_enable) + fadt->flags |= ACPI_FADT_LOW_PWR_IDLE_S0; + fadt->reset_reg.space_id = 1; fadt->reset_reg.bit_width = 8; fadt->reset_reg.bit_offset = 0; |