RTL8723BS/RTL8723CS Bluetooth
---------------------

RTL8723CS/RTL8723CS is WiFi + BT chip. WiFi part is connected over SDIO, while
BT is connected over serial. It speaks H5 protocol with few extra commands
to upload firmware and change module speed.

Required properties:

 - compatible: should be one of the following:
   * "realtek,rtl8723bs-bt"
   * "realtek,rtl8723cs-bt"
Optional properties:

 - device-wake-gpios: GPIO specifier, used to wakeup the BT module (active high)
 - enable-gpios: GPIO specifier, used to enable the BT module (active high)
 - host-wake-gpios: GPIO specifier, used to wakeup the host processor (active high)
 - firmware-postfix: firmware postfix to be used for firmware config
 - reset-gpios: GPIO specifier, used to reset the BT module (active high)

Example:

&uart1 {
       pinctrl-names = "default";
       pinctrl-0 = <&uart1_pins>, <&uart1_rts_cts_pins>;
       status = "okay";

       bluetooth {
               compatible = "realtek,rtl8723bs-bt";
               reset-gpios = <&r_pio 0 4 GPIO_ACTIVE_LOW>; /* PL4 */
               device-wake-gpios = <&r_pio 0 5 GPIO_ACTIVE_HIGH>; /* PL5 */
               host-wakeup-gpios = <&r_pio 0 6 GPIO_ACTIVE_HIGH>; /* PL6 */
               firmware-postfix="pine64";
       };
};
