soc/intel/cannonlake: Add GPID and CGPM methods to GPIO ASL

The GPID method returns the PCR Port ID of the given GPIO community.
The CGPM method alters the given GPIO community's PM bits, given in
Arg1.

Change-Id: I098ee08573eb4f8a45d9b5ae84f2d85ce525c9b8
Signed-off-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34179
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-by: Furquan Shaikh <furquan@google.com>

src/soc/intel/cannonlake/acpi/gpio.asl

@@ -16,6 +16,7 @@
 #include <soc/gpio_defs.h>
 #include <soc/irq.h>
 #include <soc/pcr_ids.h>
+#include <intelblocks/gpio.h>
 #include "gpio_op.asl"
 
 Device (GPIO)
@@ -107,3 +108,52 @@ Method (GADD, 1, NotSerialized)
 	Add (Local2, PAD_CFG_BASE, Local2)
 	Return (Add (Local2, Multiply (Local1, 16)))
 }
+
+/*
+ * Return PCR Port ID of GPIO Communities
+ *
+ * Arg0: GPIO Community (0-4)
+ */
+Method (GPID, 1, Serialized)
+{
+	Switch (ToInteger (Arg0))
+	{
+		Case (0) {
+			Store (PID_GPIOCOM0, Local0)
+		}
+		Case (1) {
+			Store (PID_GPIOCOM1, Local0)
+		}
+		Case (2) {
+			Store (PID_GPIOCOM2, Local0)
+		}
+		Case (3) {
+			Store (PID_GPIOCOM3, Local0)
+		}
+		Case (4) {
+			Store (PID_GPIOCOM4, Local0)
+		}
+		Default {
+			Return (0)
+		}
+	}
+
+	Return (Local0)
+}
+
+/*
+ * Configure GPIO Power Management bits
+ *
+ * Arg0: GPIO community (0-4)
+ * Arg1: PM bits in MISCCFG
+ */
+Method (CGPM, 2, Serialized)
+{
+	Store (GPID (Arg0), Local0)
+	If (LNotEqual (Local0, 0)) {
+		/* Mask off current PM bits */
+		PCRA (Local0, GPIO_MISCCFG, Not (MISCCFG_ENABLE_GPIO_PM_CONFIG))
+		/* Mask in requested bits */
+		PCRO (Local0, GPIO_MISCCFG, And (Arg1, MISCCFG_ENABLE_GPIO_PM_CONFIG))
+	}
+}