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MediaTek SoC built-in Bluetooth Devices
==================================
This device is a serial attached device to BTIF device and thus it must be a
child node of the serial node with BTIF. The dt-bindings details for BTIF
device can be known via Documentation/devicetree/bindings/serial/8250.txt.
Required properties:
- compatible: Must be
"mediatek,mt7622-bluetooth": for MT7622 SoC
- clocks: Should be the clock specifiers corresponding to the entry in
clock-names property.
- clock-names: Should contain "ref" entries.
- power-domains: Phandle to the power domain that the device is part of
Example:
btif: serial@1100c000 {
compatible = "mediatek,mt7622-btif",
"mediatek,mtk-btif";
reg = <0 0x1100c000 0 0x1000>;
interrupts = <GIC_SPI 90 IRQ_TYPE_LEVEL_LOW>;
clocks = <&pericfg CLK_PERI_BTIF_PD>;
clock-names = "main";
reg-shift = <2>;
reg-io-width = <4>;
bluetooth {
compatible = "mediatek,mt7622-bluetooth";
power-domains = <&scpsys MT7622_POWER_DOMAIN_WB>;
clocks = <&clk25m>;
clock-names = "ref";
};
};
MediaTek UART based Bluetooth Devices
==================================
This device is a serial attached device to UART device and thus it must be a
child node of the serial node with UART.
Please refer to the following documents for generic properties:
Documentation/devicetree/bindings/serial/slave-device.txt
Required properties:
- compatible: Must be
"mediatek,mt7663u-bluetooth": for MT7663U device
"mediatek,mt7668u-bluetooth": for MT7668U device
- vcc-supply: Main voltage regulator
- pinctrl-names: Should be "default", "runtime"
- pinctrl-0: Should contain UART RXD low when the device is powered up to
enter proper bootstrap mode.
- pinctrl-1: Should contain UART mode pin ctrl
Optional properties:
- reset-gpios: GPIO used to reset the device whose initial state keeps low,
if the GPIO is missing, then board-level design should be
guaranteed.
- current-speed: Current baud rate of the device whose defaults to 921600
Example:
uart1_pins_boot: uart1-default {
pins-dat {
pinmux = <MT7623_PIN_81_URXD1_FUNC_GPIO81>;
output-low;
};
};
uart1_pins_runtime: uart1-runtime {
pins-dat {
pinmux = <MT7623_PIN_81_URXD1_FUNC_URXD1>,
<MT7623_PIN_82_UTXD1_FUNC_UTXD1>;
};
};
uart1: serial@11003000 {
compatible = "mediatek,mt7623-uart",
"mediatek,mt6577-uart";
reg = <0 0x11003000 0 0x400>;
interrupts = <GIC_SPI 52 IRQ_TYPE_LEVEL_LOW>;
clocks = <&pericfg CLK_PERI_UART1_SEL>,
<&pericfg CLK_PERI_UART1>;
clock-names = "baud", "bus";
bluetooth {
compatible = "mediatek,mt7663u-bluetooth";
vcc-supply = <®_5v>;
reset-gpios = <&pio 24 GPIO_ACTIVE_LOW>;
pinctrl-names = "default", "runtime";
pinctrl-0 = <&uart1_pins_boot>;
pinctrl-1 = <&uart1_pins_runtime>;
current-speed = <921600>;
};
};
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