diff options
| author | Shaunak Saha <shaunak.saha@intel.com> | 2016-07-07 14:48:21 -0700 |
|---|---|---|
| committer | Aaron Durbin <adurbin@chromium.org> | 2016-07-12 20:37:57 +0200 |
| commit | 7f149c7bb4744459c775c32c71fe222c792cea19 (patch) | |
| tree | 736c9741f4e136e3fb86000554a6a691bd1bd261 /src/soc/intel/apollolake | |
| parent | e51e1045e46dfccbffc2e4ab81ac023038c4e293 (diff) | |
soc/intel/apollolake: Add handler for SCI
This patch adds the handler to enable bit for gpio_tier1_sci_en.
gpio_tier1_sci_en enables the setting of the GPIO_TIER1_SCI_STS
bit to generate a wake event and/or an SCI or SMI#. We are setting
the bit for gpio_tier1_sci_en from the ASL code as OS clears this bit
if set from BIOS. As per ACPI spec _GPE is defined as the Named
Object that evaluates to either an integer or a package. If _GPE
evaluates to an integer, the value is the bit assignment of the SCI
interrupt within the GPEx_STS register of a GPE block described in
the FADT that the embedded controller will trigger. FADT right now
has no mechanism to acheive the same.
Change-Id: I1e1bd3f5c89a5e6bea2d1858569a9d30e6da78fe
Signed-off-by: Shaunak Saha <shaunak.saha@intel.com>
Reviewed-on: https://review.coreboot.org/15578
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src/soc/intel/apollolake')
| -rw-r--r-- | src/soc/intel/apollolake/acpi/gpio.asl | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/soc/intel/apollolake/acpi/gpio.asl b/src/soc/intel/apollolake/acpi/gpio.asl index 4bf04428eb..f2a7e76f20 100644 --- a/src/soc/intel/apollolake/acpi/gpio.asl +++ b/src/soc/intel/apollolake/acpi/gpio.asl @@ -142,3 +142,13 @@ scope (\_SB) { } } } + +Scope(\_GPE) +{ + /* Dummy method for the Tier 1 GPIO SCI enable bit. When kernel reads + * _L0F in scope GPE it sets bit for gpio_tier1_sci_en in acpi enable + * register at 0x430. For APL acpi enable register DW0 i.e., ACPI + * GPE0a_EN at 0x430 is reserved. + */ + Method(_L0F, 0) {} +} |