diff options
Diffstat (limited to 'src/soc/intel/apollolake/acpi/gpio.asl')
| -rw-r--r-- | src/soc/intel/apollolake/acpi/gpio.asl | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/src/soc/intel/apollolake/acpi/gpio.asl b/src/soc/intel/apollolake/acpi/gpio.asl index 03b8edd880..5660dfa830 100644 --- a/src/soc/intel/apollolake/acpi/gpio.asl +++ b/src/soc/intel/apollolake/acpi/gpio.asl @@ -15,6 +15,7 @@ * GNU General Public License for more details. */ #include <soc/gpio_defs.h> +#include "gpiolib.asl" scope (\_SB) { @@ -141,6 +142,38 @@ scope (\_SB) { Return(0xf) } } + + Scope(\_SB.PCI0) { + /* PERST Assertion + * Note: PERST is Active High + */ + Method (PRAS, 0x1, Serialized) + { + /* + * Assert PERST + * local1 - to toggle Tx pin of Dw0 + * local2 - Address of PERST + */ + Store (Arg0, Local2) + Store (\_SB.GPC0 (Local2), Local1) + Or (Local1, PAD_CFG0_TX_STATE, Local1) + \_SB.SPC0 (Local2, Local1) + } + + /* PERST DE-Assertion */ + Method (PRDA, 0x1, Serialized) + { + /* + * De-assert PERST + * local1 - to toggle Tx pin of Dw0 + * local2 - Address of PERST + */ + Store (Arg0, Local2) + Store (\_SB.GPC0 (Local2), Local1) + And (Local1, Not (PAD_CFG0_TX_STATE), Local1) + \_SB.SPC0 (Local2, Local1) + } + } } Scope(\_GPE) |