From 1b61d9744d312126b95ca2b2f7c2868f49ff8fa1 Mon Sep 17 00:00:00 2001
From: PMheart <17109513+PMheart@users.noreply.github.com>
Date: Wed, 4 Sep 2019 07:10:19 +0800
Subject: [PATCH] AcpiSamples: Added SSDT-RTC0

---
 Docs/AcpiSamples/SSDT-AWAC.dsl | 17 ++++++++-------
 Docs/AcpiSamples/SSDT-RTC0.dsl | 39 ++++++++++++++++++++++++++++++++++
 2 files changed, 48 insertions(+), 8 deletions(-)
 create mode 100644 Docs/AcpiSamples/SSDT-RTC0.dsl

diff --git a/Docs/AcpiSamples/SSDT-AWAC.dsl b/Docs/AcpiSamples/SSDT-AWAC.dsl
index 9e5a84ab..58c6529b 100644
--- a/Docs/AcpiSamples/SSDT-AWAC.dsl
+++ b/Docs/AcpiSamples/SSDT-AWAC.dsl
@@ -1,12 +1,13 @@
 /*
-* For 300-series only. If you can't force enable Legacy RTC in BIOS GUI.
-* macOS does yet not support AWAC, so we have to force enable RTC. Do not use RTC ACPI patch.
-* 
-* The Time and Alarm device provides an alternative to the real time clock (RTC), which is defined as a fixed feature hardware device.
-* The wake timers allow the system to transition from the S3 (or optionally S4/S5) state to S0 state after a time period elapses.
-* In comparison with the Real Time Clock (RTC) Alarm, the Time and Alarm device provides a larger scale of flexibility in the operation of the wake timers,
-* and allows the implementation of the time source to be abstracted from the OSPM.
-*/
+ * For 300-series only. If you can't force enable Legacy RTC in BIOS GUI.
+ * macOS does yet not support AWAC, so we have to force enable RTC. Do not use RTC ACPI patch.
+ * 
+ * The Time and Alarm device provides an alternative to the real time clock (RTC), which is defined as a fixed feature hardware device.
+ * The wake timers allow the system to transition from the S3 (or optionally S4/S5) state to S0 state after a time period elapses.
+ * In comparison with the Real Time Clock (RTC) Alarm, the Time and Alarm device provides a larger scale of flexibility in the operation of the wake timers,
+ * and allows the implementation of the time source to be abstracted from the OSPM.
+ */
+
 DefinitionBlock ("", "SSDT", 2, "ACDT", "AWAC", 0x00000000)
 {
     External (STAS, IntObj)
diff --git a/Docs/AcpiSamples/SSDT-RTC0.dsl b/Docs/AcpiSamples/SSDT-RTC0.dsl
new file mode 100644
index 00000000..bba76ff5
--- /dev/null
+++ b/Docs/AcpiSamples/SSDT-RTC0.dsl
@@ -0,0 +1,39 @@
+/*
+ * For 300-series only and occasions where SSDT-AWAC is not applicable, 
+ * which requires variable STAS to be present.
+ *
+ * On some boards RTC device is disabled by returning 0 from _STA status method and
+ * to enable it 0xF will be returned as expected by macOS.
+ */
+
+DefinitionBlock ("", "SSDT", 2, "ACDT", "RTC0", 0x00000000)
+{
+    External (_SB_.PCI0.LPCB, DeviceObj)    // (from opcode)
+
+    Scope (_SB.PCI0.LPCB)
+    {
+        Device (RTC0)
+        {
+            Name (_HID, EisaId ("PNP0B00"))  // _HID: Hardware ID
+            Name (_CRS, ResourceTemplate ()  // _CRS: Current Resource Settings
+            {
+                IO (Decode16,
+                    0x0070,             // Range Minimum
+                    0x0070,             // Range Maximum
+                    0x01,               // Alignment
+                    0x08,               // Length
+                    )
+                IRQNoFlags ()
+                    {8}
+            })
+            Method (_STA, 0, NotSerialized)  // _STA: Status
+            {
+                If (_OSI ("Darwin")) {
+                    Return (0x0F)
+                } Else {
+                    Return (0);
+                }
+            }
+        }
+    }
+}
\ No newline at end of file