Broadcom Bluetooth Chips --------------------- This documents the binding structure and common properties for serial attached Broadcom devices. Serial attached Broadcom devices shall be a child node of the host UART device the slave device is attached to. Required properties: - compatible: should contain one of the following: * "brcm,bcm20702a1" * "brcm,bcm4329-bt" * "brcm,bcm4330-bt" * "brcm,bcm43438-bt" * "brcm,bcm4345c5" * "brcm,bcm43540-bt" * "brcm,bcm4335a0" Optional properties: - max-speed: see Documentation/devicetree/bindings/serial/serial.yaml - 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. deprecated, replaced by interrupts and "host-wakeup" interrupt-names - clocks: 1 or 2 clocks as defined in clock-names below, in that order - clock-names: names for clock inputs, matching the clocks given - "extclk": deprecated, replaced by "txco" - "txco": external reference clock (not a standalone crystal) - "lpo": external low power 32.768 kHz clock - vbat-supply: phandle to regulator supply for VBAT - vddio-supply: phandle to regulator supply for VDDIO - brcm,bt-pcm-int-params: configure PCM parameters via a 5-byte array - sco-routing: 0 = PCM, 1 = Transport, 2 = Codec, 3 = I2S - pcm-interface-rate: 128KBps, 256KBps, 512KBps, 1024KBps, 2048KBps - pcm-frame-type: short, long - pcm-sync-mode: slave, master - pcm-clock-mode: slave, master - interrupts: must be one, used to wakeup the host processor - interrupt-names: must be "host-wakeup" Example: &uart2 { pinctrl-names = "default"; pinctrl-0 = <&uart2_pins>; bluetooth { compatible = "brcm,bcm43438-bt"; max-speed = <921600>; brcm,bt-pcm-int-params = [01 02 00 01 01]; }; };