Broadcom Bluetooth Chips---------------------This documents the binding structure and common properties for serialattached Broadcom devices.Serial attached Broadcom devices shall be a child node of the host UARTdevice the slave device is attached to.Required properties: - compatible: should contain one of the following: * "brcm,bcm43438-bt"Optional properties: - max-speed: see Documentation/devicetree/bindings/serial/slave-device.txt - shutdown-gpios: GPIO specifier, used to enable the BT module - device-wakeup-gpios: GPIO specifier, used to wakeup the controller - host-wakeup-gpios: GPIO specifier, used to wakeup the host processor - clocks: clock specifier if external clock provided to the controller - clock-names: should be "extclk"Example:&uart2 { pinctrl-names = "default"; pinctrl-0 = <&uart2_pins>; bluetooth { compatible = "brcm,bcm43438-bt"; max-speed = <921600>; };};