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intel/skylake: Add GPIO ACPI Apis. 

GPIO ASL APIs to get GPIO Value.
Need such APIs to read GPIO config settings.
Example: Kunimitsu need to read AUDIO_DB GPIO
to identify codec select.

BUG=chrome-os-partner:44481
BRANCH=none
TEST=build and boot on Kunimitsu.

Change-Id: If56bb7b3eae08e1949d372850a6426dfde5aadd0
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 4983ba835a8da2baf578b035ae482755983c1ecb
Original-Change-Id: Ia40d86c8d4b14857fa8822677b3f7d393a35b677
Original-Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/316352
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/12956
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
This commit is contained in:
Subrata Banik 2015-12-07 19:49:01 +05:30 committed by Patrick Georgi
parent b7a42d388b
commit fbc4609265
1 changed files with 46 additions and 0 deletions
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46
src/soc/intel/skylake/acpi/gpio.asl
View File

@ -13,6 +13,7 @@
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <soc/gpio_defs.h>
Device (GPIO)
{
@ -67,3 +68,48 @@ Device (GPIO)
Return (0xF)
}
}
/*
* Get GPIO DW0 Address
* Arg0 - GPIO Number
*/
Method (GADD, 1, NotSerialized)
{
/* GPIO Community 0 */
If (LAnd (LGreaterEqual (Arg0, GPP_A0), LLessEqual (Arg0, GPP_B23)))
{
Store (PID_GPIOCOM0, Local0)
Subtract (Arg0, GPP_A0, Local1)
}
/* GPIO Community 1 */
If (LAnd (LGreaterEqual (Arg0, GPP_C0), LLessEqual (Arg0, GPP_E23)))
{
Store (PID_GPIOCOM1, Local0)
Subtract (Arg0, GPP_C0, Local1)
}
/* GPIO Community 03*/
If (LAnd (LGreaterEqual (Arg0, GPP_F0), LLessEqual (Arg0, GPP_G7)))
{
Store (PID_GPIOCOM3, Local0)
Subtract (Arg0, GPP_F0, Local1)
}
Store (PCRB (Local0), Local2)
Add (Local2, PAD_CFG_DW_OFFSET, Local2)
Return (Add (Local2, Multiply (Local1, 8)))
}
/*
* Get GPIO Value
* Arg0 - GPIO Number
*/
Method (GRXS, 1, NotSerialized)
{
OperationRegion (PREG, SystemMemory, GADD (Arg0), 4)
Field (PREG, AnyAcc, NoLock, Preserve)
{
VAL0, 32
}
And (GPIORXSTATE_MASK, ShiftRight (VAL0, GPIORXSTATE_SHIFT), Local0)
Return (Local0)
}