x86: baytrail: Add GPIO ASL description

Since BayTrail, Intel starts to use new GPIO IPs in their chipset.
This adds the GPIO ASL, so that OS can load corresponding drivers
for it. On Linux, this is BayTrail pinctrl driver.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

arch/x86/include/asm/arch-baytrail/acpi/gpio.asl

@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) 2013 Google Inc.
+ * Copyright (C) 2016 Bin Meng <bmeng.cn@gmail.com>
+ *
+ * Modified from coreboot src/soc/intel/baytrail/acpi/gpio.asl
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+/* SouthCluster GPIO */
+Device (GPSC)
+{
+	Name(_HID, "INT33FC")
+	Name(_CID, "INT33FC")
+	Name(_UID, 1)
+
+	Name(RBUF, ResourceTemplate()
+	{
+		Memory32Fixed(ReadWrite, 0, 0x1000, RMEM)
+		Interrupt(ResourceConsumer, Level, ActiveLow, Shared, , ,)
+		{
+			GPIO_SC_IRQ
+		}
+	})
+
+	Method(_CRS)
+	{
+		CreateDwordField(^RBUF, ^RMEM._BAS, RBAS)
+		Add(IO_BASE_ADDRESS, IO_BASE_OFFSET_GPSCORE, RBAS)
+		Return (^RBUF)
+	}
+
+	Method(_STA)
+	{
+		Return (STA_VISIBLE)
+	}
+}
+
+/* NorthCluster GPIO */
+Device (GPNC)
+{
+	Name(_HID, "INT33FC")
+	Name(_CID, "INT33FC")
+	Name(_UID, 2)
+
+	Name(RBUF, ResourceTemplate()
+	{
+		Memory32Fixed(ReadWrite, 0, 0x1000, RMEM)
+		Interrupt(ResourceConsumer, Level, ActiveLow, Shared, , ,)
+		{
+			GPIO_NC_IRQ
+		}
+	})
+
+	Method(_CRS)
+	{
+		CreateDwordField(^RBUF, ^RMEM._BAS, RBAS)
+		Add(IO_BASE_ADDRESS, IO_BASE_OFFSET_GPNCORE, RBAS)
+		Return (^RBUF)
+	}
+
+	Method(_STA)
+	{
+		Return (STA_VISIBLE)
+	}
+}
+
+/* SUS GPIO */
+Device (GPSS)
+{
+	Name(_HID, "INT33FC")
+	Name(_CID, "INT33FC")
+	Name(_UID, 3)
+
+	Name(RBUF, ResourceTemplate()
+	{
+		Memory32Fixed(ReadWrite, 0, 0x1000, RMEM)
+		Interrupt(ResourceConsumer, Level, ActiveLow, Shared, , ,)
+		{
+			GPIO_SUS_IRQ
+		}
+	})
+
+	Method(_CRS)
+	{
+		CreateDwordField(^RBUF, ^RMEM._BAS, RBAS)
+		Add(IO_BASE_ADDRESS, IO_BASE_OFFSET_GPSSUS, RBAS)
+		Return (^RBUF)
+	}
+
+	Method(_STA)
+	{
+		Return (STA_VISIBLE)
+	}
+}

arch/x86/include/asm/arch-baytrail/acpi/platform.asl

@@ -27,6 +27,9 @@ Method(_WAK, 1)
 Scope (\_SB)
 {
 	#include "southcluster.asl"
+
+	/* ACPI devices */
+	#include "gpio.asl"
 }
 
 /* Chipset specific sleep states */