| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame] | 1 | Broadcom Bluetooth Chips |
| 2 | --------------------- |
| 3 | |
| 4 | This documents the binding structure and common properties for serial |
| 5 | attached Broadcom devices. |
| 6 | |
| 7 | Serial attached Broadcom devices shall be a child node of the host UART |
| 8 | device the slave device is attached to. |
| 9 | |
| 10 | Required properties: |
| 11 | |
| 12 | - compatible: should contain one of the following: |
| 13 | * "brcm,bcm20702a1" |
| 14 | * "brcm,bcm4330-bt" |
| 15 | * "brcm,bcm43438-bt" |
| 16 | * "brcm,bcm4345c5" |
| 17 | |
| 18 | Optional properties: |
| 19 | |
| 20 | - max-speed: see Documentation/devicetree/bindings/serial/slave-device.txt |
| 21 | - shutdown-gpios: GPIO specifier, used to enable the BT module |
| 22 | - device-wakeup-gpios: GPIO specifier, used to wakeup the controller |
| 23 | - host-wakeup-gpios: GPIO specifier, used to wakeup the host processor |
| 24 | - clocks: 1 or 2 clocks as defined in clock-names below, in that order |
| 25 | - clock-names: names for clock inputs, matching the clocks given |
| 26 | - "extclk": deprecated, replaced by "txco" |
| 27 | - "txco": external reference clock (not a standalone crystal) |
| 28 | - "lpo": external low power 32.768 kHz clock |
| 29 | - vbat-supply: phandle to regulator supply for VBAT |
| 30 | - vddio-supply: phandle to regulator supply for VDDIO |
| 31 | |
| 32 | |
| 33 | Example: |
| 34 | |
| 35 | &uart2 { |
| 36 | pinctrl-names = "default"; |
| 37 | pinctrl-0 = <&uart2_pins>; |
| 38 | |
| 39 | bluetooth { |
| 40 | compatible = "brcm,bcm43438-bt"; |
| 41 | max-speed = <921600>; |
| 42 | }; |
| 43 | }; |