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authorShaunak Saha <shaunak.saha@intel.com>2020-01-15 15:35:41 -0800
committerPatrick Georgi <pgeorgi@google.com>2020-01-25 09:58:54 +0000
commita8cb7ed784f51b071873585359257110c1bcc8be (patch)
treee349ae5fd967fbb4ba2ba9c506424538a456a8d1 /src
parente8338da597f892d333af9bb77ab89289b8140633 (diff)
downloadcoreboot-a8cb7ed784f51b071873585359257110c1bcc8be.tar.xz
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>
Diffstat (limited to 'src')
-rw-r--r--src/soc/intel/tigerlake/acpi/gpio.asl46
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
+}