[PATCH v2 2/2] Platform/RaspberryPi: Enable Bluetooth and UART in Windows OS

["Sunny Wang" <Sunny.Wang@arm.com>]

Merge changes in edk2-platforms-raspberrypi-pl011-bth-noflow.diff in
https://github.com/worproject/RPi-Bluetooth-Testing/ for enabling
Bluetooth and serial port (Mini UART) in Windows OS.

Testing Done:
  - Successfully booted Windows 10 (20279.1) on SD (made by WOR) with
    the RPi-Windows-Drivers release ver 0.5 downloaded from
    https://github.com/worproject/RPi-Windows-Drivers/releases
    and checked that both Bluetooth and serial port (Mini UART) can
    work fine.

Cc: Samer El-Haj-Mahmoud <samer.el-haj-mahmoud@arm.com>
Cc: Sami Mujawar <sami.mujawar@arm.com>
Cc: Jeremy Linton <jeremy.linton@arm.com>
Cc: Pete Batard <pete@akeo.ie>
Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Signed-off-by: Sunny Wang <sunny.wang@arm.com>
---
 Platform/RaspberryPi/AcpiTables/Uart.asl | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/Platform/RaspberryPi/AcpiTables/Uart.asl b/Platform/RaspberryPi/AcpiTables/Uart.asl
index 8ce297078d..e3165911a6 100644
--- a/Platform/RaspberryPi/AcpiTables/Uart.asl
+++ b/Platform/RaspberryPi/AcpiTables/Uart.asl
@@ -30,6 +30,12 @@ Device (URT0)
   {
     MEMORY32FIXED (ReadWrite, 0, BCM2836_PL011_UART_LENGTH, RMEM)
     Interrupt (ResourceConsumer, Level, ActiveHigh, Exclusive) { BCM2836_PL011_UART_INTERRUPT }
+
+    PinFunction (Exclusive, PullDown, BCM_ALT3, "\\_SB.GDV0.GPI0", 0, ResourceConsumer, , ) { 32, 33 }
+
+    // fake the CTS signal as we don't support HW flow control yet
+    // BCM_ALT2 is set as output (low) by default
+    PinFunction (Exclusive, PullNone, BCM_ALT2, "\\_SB.GDV0.GPI0", 0, ResourceConsumer, , ) { 31 }
   })
   Method (_CRS, 0x0, Serialized)
   {
@@ -142,7 +148,7 @@ Device(BTH0)
       //
       // RPIQ connection for BT_ON/OFF
       //
-      GpioIO (Shared, PullUp, 0, 0, IoRestrictionNone, "\\_SB.GDV0.RPIQ", 0, ResourceConsumer, , ) { 128 }
+      //GpioIO (Shared, PullUp, 0, 0, IoRestrictionNone, "\\_SB.GDV0.RPIQ", 0, ResourceConsumer, , ) { 128 }
     })
     Return (RBUF)
   }
-- 
2.31.0.windows.1