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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];
};
};
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