[edk2-platforms][PATCH v1 2/2] Platform/RaspberryPi: Add analog audio device in ACPI

["Mario Bălănică" <mariobalanica02@gmail.com>]

The Windows audio driver now binds to this device.

Signed-off-by: Mario Bălănică <mariobalanica02@gmail.com>
---
 Platform/RaspberryPi/AcpiTables/GpuDevs.asl | 28 ++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/Platform/RaspberryPi/AcpiTables/GpuDevs.asl b/Platform/RaspberryPi/AcpiTables/GpuDevs.asl
index b499620e089a..734547e5a806 100644
--- a/Platform/RaspberryPi/AcpiTables/GpuDevs.asl
+++ b/Platform/RaspberryPi/AcpiTables/GpuDevs.asl
@@ -440,6 +440,34 @@ Device (PWM1)
 }
 #endif
 
+// Analog Audio (PWM-driven)
+Device (AAUD)
+{
+  Name (_HID, "RPI73EA")
+#if (RPI_MODEL == 3)
+  Name (_DEP, Package() { \_SB.GDV0.PWM0 })
+#elif (RPI_MODEL == 4)
+  Name (_DEP, Package() { \_SB.GDV0.PWM1 })
+#endif
+  Method (_STA)
+  {
+    Return (0xf)
+  }
+  Name (_DSD, Package () {
+    ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
+    Package () {
+      Package () { "pwm-clock-source", "plld" },
+#if (RPI_MODEL == 3)
+      Package () { "pwm-clock-source-frequency", 500000000 },
+      Package () { "pwm-clock-max-frequency", 125000000 }, // higher may work, but it's untested
+#elif (RPI_MODEL == 4)
+      Package () { "pwm-clock-source-frequency", 750000000 },
+      Package () { "pwm-clock-max-frequency", 375000000 },
+#endif
+    }
+  })
+}
+
 include ("Uart.asl")
 include ("Rhpx.asl")
 include ("Sdhc.asl")
-- 
2.29.2.windows.2