diff options
| author | Shaunak Saha <shaunak.saha@intel.com> | 2020-01-15 15:35:41 -0800 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2020-01-25 09:58:54 +0000 |
| commit | a8cb7ed784f51b071873585359257110c1bcc8be (patch) | |
| tree | e349ae5fd967fbb4ba2ba9c506424538a456a8d1 | |
| parent | e8338da597f892d333af9bb77ab89289b8140633 (diff) | |
soc/intel/tigerlake: Add GPIO helper function
This patch adds ASL methods like GRXS, GTXS, STXS and CTXS
which are used to get, set and clear gpio values. We use
ASL 2.0 syntax here for gpio.asl.
BUG=b:144680462
BRANCH=none
TEST=Build and boot tigerlake rvp board
Change-Id: I17e75ff2a7cb67e94669059a1ed9d73a720ebcb1
Signed-off-by: Shaunak Saha <shaunak.saha@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38442
Reviewed-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-by: Nick Vaccaro <nvaccaro@google.com>
Reviewed-by: Wonkyu Kim <wonkyu.kim@intel.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
| -rw-r--r-- | src/soc/intel/tigerlake/acpi/gpio.asl | 46 |
1 files changed, 45 insertions, 1 deletions
diff --git a/src/soc/intel/tigerlake/acpi/gpio.asl b/src/soc/intel/tigerlake/acpi/gpio.asl index dc76a387b7..f6cccfb801 100644 --- a/src/soc/intel/tigerlake/acpi/gpio.asl +++ b/src/soc/intel/tigerlake/acpi/gpio.asl @@ -163,7 +163,51 @@ Method (GRXS, 1, Serialized) { VAL0, 32 } - And (GPIORXSTATE_MASK, ShiftRight (VAL0, GPIORXSTATE_SHIFT), Local0) + Local0 = GPIORXSTATE_MASK & (VAL0 >> GPIORXSTATE_SHIFT) Return (Local0) } + +/* + * Get GPIO Tx Value + * Arg0 - GPIO Number + */ +Method (GTXS, 1, Serialized) +{ + OperationRegion (PREG, SystemMemory, GADD (Arg0), 4) + Field (PREG, AnyAcc, NoLock, Preserve) + { + VAL0, 32 + } + Local0 = GPIOTXSTATE_MASK & VAL0 + + Return (Local0) +} + +/* + * Set GPIO Tx Value + * Arg0 - GPIO Number + */ +Method (STXS, 1, Serialized) +{ + OperationRegion (PREG, SystemMemory, GADD (Arg0), 4) + Field (PREG, AnyAcc, NoLock, Preserve) + { + VAL0, 32 + } + VAL0 |= GPIOTXSTATE_MASK +} + +/* + * Clear GPIO Tx Value + * Arg0 - GPIO Number + */ +Method (CTXS, 1, Serialized) +{ + OperationRegion (PREG, SystemMemory, GADD (Arg0), 4) + Field (PREG, AnyAcc, NoLock, Preserve) + { + VAL0, 32 + } + VAL0 &= ~GPIOTXSTATE_MASK +} |