[coreboot-gerrit] New patch to review for coreboot: google/reef: Enable touchscreen in ACPI

[Furquan Shaikh (furquan@google.com)]

Furquan Shaikh (furquan at google.com) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/15499

-gerrit

commit ad1123017b504795e613ec6004e7d1eac4f74f5f
Author: Furquan Shaikh <furquan at google.com>
Date:   Wed Jun 29 13:06:52 2016 -0700

    google/reef: Enable touchscreen in ACPI
    
    Add support for ELAN touchscreen on I2C3.
    
    Change-Id: Id8b07a3a3fd4beca0d7ce804ba8d6859275c70d9
    Signed-off-by: Furquan Shaikh <furquan at google.com>
---
 src/mainboard/google/reef/acpi/mainboard.asl | 32 ++++++++++++++++++++++++++++
 src/mainboard/google/reef/gpio.h             |  1 +
 2 files changed, 33 insertions(+)

diff --git a/src/mainboard/google/reef/acpi/mainboard.asl b/src/mainboard/google/reef/acpi/mainboard.asl
index 5471488..d6f9289 100644
--- a/src/mainboard/google/reef/acpi/mainboard.asl
+++ b/src/mainboard/google/reef/acpi/mainboard.asl
@@ -33,6 +33,38 @@ Scope (\_SB)
 	}
 }
 
+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)
+			{
+				TOUCHSCREEN_INT
+			}
+		})
+
+		Method (_STA)
+		{
+			Return (0xF)
+		}
+	}
+}
+
 Scope (\_SB.PCI0.I2C4)
 {
 	/* Standard Mode: HCNT, LCNT, SDA Hold Register */
diff --git a/src/mainboard/google/reef/gpio.h b/src/mainboard/google/reef/gpio.h
index b41f5f9..b491dfe 100644
--- a/src/mainboard/google/reef/gpio.h
+++ b/src/mainboard/google/reef/gpio.h
@@ -20,6 +20,7 @@
 
 /* Input device interrupt configuration */
 #define TOUCHPAD_INT		GPIO_18_IRQ
+#define TOUCHSCREEN_INT	GPIO_21_IRQ
 
 #ifndef __ACPI__
 /*