mb/google/kahlee: Use GPIO_10 for EC_SYNC_IRQ

Use AGPIO 10 as the EC sync interrupt for MKBP events for sensor data.

On this platform, interrupts are routed via the GPIO controller so need to be
registered using GpioInt instead of Interrupt.

BUG=b:123750725
BRANCH=grunt
TEST=MKBP events still received (with matching EC and kernel changes)

Change-Id: If499d24511bbaa7054207b7e0b98445723332c4f
Signed-off-by: Edward Hill <ecgh@chromium.org>
Reviewed-on: https://review.coreboot.org/c/31278
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Enrico Granata <egranata@chromium.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Reviewed-by: Martin Roth <martinroth@google.com>

src/ec/google/chromeec/acpi/cros_ec.asl

@@ -32,6 +32,17 @@ Device (CREC)
 	})
 #endif
 
+#ifdef EC_ENABLE_SYNC_IRQ_GPIO
+	Name (_CRS, ResourceTemplate ()
+	{
+		GpioInt (Level, ActiveLow, Exclusive, PullDefault, 0x0000,
+		         "\\_SB.GPIO", 0x00, ResourceConsumer, ,)
+		{
+			EC_SYNC_IRQ
+		}
+	})
+#endif
+
 #ifdef EC_ENABLE_MKBP_DEVICE
 	Device (CKSC)
 	{

src/mainboard/google/kahlee/variants/aleena/include/variant/ec.h

@@ -15,3 +15,9 @@
 
 /* Enable EC backed Keyboard Backlight in ACPI */
 #define EC_ENABLE_KEYBOARD_BACKLIGHT
+
+/*
+ * Enable EC sync interrupt via GPIO controller, EC_SYNC_IRQ is defined in
+ * variant/gpio.h
+ */
+#define EC_ENABLE_SYNC_IRQ_GPIO

src/mainboard/google/kahlee/variants/aleena/include/variant/gpio.h

@@ -14,3 +14,6 @@
  */
 
 #include <baseboard/gpio.h>
+
+/* EC sync irq is AGPIO 10 */
+#define EC_SYNC_IRQ	10

src/mainboard/google/kahlee/variants/baseboard/gpio.c

@@ -117,8 +117,8 @@ static const struct soc_amd_gpio gpio_set_stage_ram[] = {
 	/* GPIO_8 - DDR_ALERT_3V3_L (currently not used) */
 	PAD_GPI(GPIO_8, PULL_UP),
 
-	/* GPIO_10 - SLP_S0_L (currently not used) */
-	PAD_NF(GPIO_10, S0A3_GPIO, PULL_UP),
+	/* GPIO_10 - SLP_S0_L, EC_SYNC_IRQ */
+	PAD_GPI(GPIO_10, PULL_UP),
 
 	/* GPIO_11 - TOUCHSCREEN_INT_3V3_ODL, SCI */
 	PAD_SCI(GPIO_11, PULL_UP, EDGE_LOW),