From 7210ec0dcaca84957a5ebe9ea6e222d55a1431bb Mon Sep 17 00:00:00 2001 From: Shaunak Saha Date: Wed, 13 Dec 2017 09:37:05 -0800 Subject: 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 Reviewed-on: https://review.coreboot.org/23095 Tested-by: build bot (Jenkins) Reviewed-by: Furquan Shaikh Reviewed-by: Aaron Durbin Reviewed-by: Paul Menzel --- src/soc/intel/apollolake/acpi.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'src/soc/intel/apollolake') diff --git a/src/soc/intel/apollolake/acpi.c b/src/soc/intel/apollolake/acpi.c index 1449a36619..5e42091965 100644 --- a/src/soc/intel/apollolake/acpi.c +++ b/src/soc/intel/apollolake/acpi.c @@ -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) -- cgit v1.2.3