[PATCH 0/3 V5] Bluetooth: Add support for RTL8821CS

[Chris Morgan <macroalpha82@gmail.com>]

From: Chris Morgan <macromorgan@hotmail.com>

This patch series is to add support for the RTL8821CS Bluetooth
controller found on the RTL8821CS WiFi/Bluetooth combo chip.

This has been tested with firmware version 0x75b8f098 which has been
submitted by Realtek for inclusion in linux-firmware.

https://lore.kernel.org/linux-firmware/20230223062453.181239-1-max.chou@realtek.com/

Changes from V4:
 - After extensive testing it was found that there are problems with
   using the bluetooth that were not caught with the initial testing.
   This can be mitigated by setting the "H5_INFO_WAKEUP_DISABLE" flag.
   The easiest way to accomplish that is to change the fallback
   compatible string to "realtek,rtl8723bs-bt". Updated the binding
   documentation and binding to reflect this. No change to the driver
   from V4 was necessary. Removed "reviewed-by" from documentation due
   to this change.

Changes from V3:
 - Corrected bindings so that all but the 8821 use enum, and 8821 uses
   items.

Changes from V2:
 - Corrected devicetree documentation to change compatible from const
   back to enum.
 - Removed "reviewed-by" from Alistair Francis as binding documentation
   updated with changes.

Changes from V1:
 - Switched to use a fallback string for the rtl8822cs so as to not add
   an extra entry to the of_device_id table. The driver is capable of
   selecting the correct firmware blob to load.
 - Updated the messages to note a new version of the firmware was
   tested and that Realtek has submitted this firmware upstream.
 - Updated the devicetree node on the Anbernic RGxx3 series to use the
   fallback string of realtek,rtl8822cs-bt.

Chris Morgan (3):
  dt-bindings: net: realtek-bluetooth: Add RTL8821CS
  Bluetooth: hci_h5: btrtl: Add support for RTL8821CS
  arm64: dts: rockchip: Update compatible for bluetooth

 .../bindings/net/realtek-bluetooth.yaml       | 24 ++++++++++++-------
 .../dts/rockchip/rk3566-anbernic-rgxx3.dtsi   |  2 +-
 drivers/bluetooth/btrtl.c                     |  8 +++++++
 3 files changed, 24 insertions(+), 10 deletions(-)

-- 
2.34.1