| 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]; |
| }; |
| }; |
