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soc/intel/apollolake: Set ACPI_FADT_LOW_PWR_IDLE_S0 for S0ix 

This patch sets the ACPI FADT flag ACPI_FADT_LOW_PWR_IDLE_S0
if S0IX is enabled for the platform.

TEST= Boot to OS and check the ACPI_FADT_LOW_PWR_IDLE_S0 flag
      is set in FACP table.

Change-Id: Ibb43d5c8024dcdf753416e4bd2a457991cc7a433
Signed-off-by: Shaunak Saha <shaunak.saha@intel.com>
Reviewed-on: https://review.coreboot.org/23095
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
This commit is contained in:
Shaunak Saha 2017-12-13 09:37:05 -08:00 committed by Aaron Durbin
parent 0a19b080ef
commit 7210ec0dca
1 changed files with 12 additions and 0 deletions
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12
src/soc/intel/apollolake/acpi.c
View File

@ -153,6 +153,9 @@ int soc_madt_sci_irq_polarity(int sci)
void soc_fill_fadt(acpi_fadt_t *fadt)
{
const struct soc_intel_apollolake_config *cfg;
struct device *dev = SA_DEV_ROOT;
fadt->pm_tmr_blk = ACPI_BASE_ADDRESS + PM1_TMR;
fadt->p_lvl2_lat = ACPI_FADT_C2_NOT_SUPPORTED;
@ -166,6 +169,15 @@ void soc_fill_fadt(acpi_fadt_t *fadt)
fadt->x_pm_tmr_blk.space_id = 1;
fadt->x_pm_tmr_blk.bit_width = fadt->pm_tmr_len * 8;
fadt->x_pm_tmr_blk.addrl = ACPI_BASE_ADDRESS + PM1_TMR;
if (!dev || !dev->chip_info) {
printk(BIOS_ERR, "BUG! Could not find SOC devicetree config\n");
return;
}
cfg = dev->chip_info;
if(cfg->lpss_s0ix_enable)
fadt->flags |= ACPI_FADT_LOW_PWR_IDLE_S0;
}
void soc_power_states_generation(int core_id, int cores_per_package)