intel/amenia: Enable touchscreen in ACPI
Add support for Elan touchscreen on I2C3 for amenia
BUG=None
TEST=Boot to Chromium OS and verify if touchscreen is working.
Change-Id: Ic75bef0e5878bd5b8c0d727400679663d9f591e3
Signed-off-by: Freddy Paul <freddy.paul@intel.com>
Reviewed-on: https://review.coreboot.org/14768
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
diff --git a/src/mainboard/intel/amenia/acpi/mainboard.asl b/src/mainboard/intel/amenia/acpi/mainboard.asl
index 76c63b7..35043b0e 100644
--- a/src/mainboard/intel/amenia/acpi/mainboard.asl
+++ b/src/mainboard/intel/amenia/acpi/mainboard.asl
@@ -47,3 +47,35 @@
}
}
+
+Scope (\_SB.PCI0.I2C3)
+{
+ Device (ETSA)
+ {
+ Name (_HID, "ELAN0001")
+ Name (_DDN, "Elan Touchscreen")
+ Name (_UID, 1)
+ Name (ISTP, 0) /* TouchScreen */
+ Name (_S0W, 4)
+
+ Name (_CRS, ResourceTemplate()
+ {
+ I2cSerialBus (
+ 0x10, // SlaveAddress
+ ControllerInitiated, // SlaveMode
+ 400000, // ConnectionSpeed
+ AddressingMode7Bit, // AddressingMode
+ "\\_SB.PCI0.I2C3", // ResourceSource
+ )
+ Interrupt (ResourceConsumer, Edge, ActiveLow)
+ {
+ GPIO_21_IRQ
+ }
+ })
+
+ Method (_STA)
+ {
+ Return (0xF)
+ }
+ }
+}