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Some board requires explicitily control external osscilator via GPIO. So, add a clock property for an external oscillator for the device. Signed-off-by: Sean Wang <sean.wang@mediatek.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
117 lines
3.6 KiB
Plaintext
117 lines
3.6 KiB
Plaintext
MediaTek SoC built-in Bluetooth Devices
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==================================
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This device is a serial attached device to BTIF device and thus it must be a
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child node of the serial node with BTIF. The dt-bindings details for BTIF
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device can be known via Documentation/devicetree/bindings/serial/8250.txt.
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Required properties:
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- compatible: Must be
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"mediatek,mt7622-bluetooth": for MT7622 SoC
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- clocks: Should be the clock specifiers corresponding to the entry in
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clock-names property.
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- clock-names: Should contain "ref" entries.
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- power-domains: Phandle to the power domain that the device is part of
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Example:
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btif: serial@1100c000 {
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compatible = "mediatek,mt7622-btif",
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"mediatek,mtk-btif";
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reg = <0 0x1100c000 0 0x1000>;
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interrupts = <GIC_SPI 90 IRQ_TYPE_LEVEL_LOW>;
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clocks = <&pericfg CLK_PERI_BTIF_PD>;
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clock-names = "main";
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reg-shift = <2>;
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reg-io-width = <4>;
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bluetooth {
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compatible = "mediatek,mt7622-bluetooth";
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power-domains = <&scpsys MT7622_POWER_DOMAIN_WB>;
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clocks = <&clk25m>;
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clock-names = "ref";
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};
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};
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MediaTek UART based Bluetooth Devices
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==================================
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This device is a serial attached device to UART device and thus it must be a
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child node of the serial node with UART.
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Please refer to the following documents for generic properties:
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Documentation/devicetree/bindings/serial/slave-device.txt
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Required properties:
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- compatible: Must be
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"mediatek,mt7663u-bluetooth": for MT7663U device
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"mediatek,mt7668u-bluetooth": for MT7668U device
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- vcc-supply: Main voltage regulator
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If the pin controller on the platform can support both pinmux and GPIO
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control such as the most of MediaTek platform. Please use below properties.
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- pinctrl-names: Should be "default", "runtime"
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- pinctrl-0: Should contain UART RXD low when the device is powered up to
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enter proper bootstrap mode.
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- pinctrl-1: Should contain UART mode pin ctrl
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Else, the pin controller on the platform only can support pinmux control and
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the GPIO control still has to rely on the dedicated GPIO controller such as
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a legacy MediaTek SoC, MT7621. Please use the below properties.
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- boot-gpios: GPIO same to the pin as UART RXD and used to keep LOW when
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the device is powered up to enter proper bootstrap mode when
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- pinctrl-names: Should be "default"
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- pinctrl-0: Should contain UART mode pin ctrl
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Optional properties:
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- reset-gpios: GPIO used to reset the device whose initial state keeps low,
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if the GPIO is missing, then board-level design should be
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guaranteed.
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- clocks: Should be the clock specifiers corresponding to the entry in
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clock-names property. If the clock is missing, then board-level
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design should be guaranteed.
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- clock-names: Should contain "osc" entry for the external oscillator.
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- current-speed: Current baud rate of the device whose defaults to 921600
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Example:
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uart1_pins_boot: uart1-default {
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pins-dat {
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pinmux = <MT7623_PIN_81_URXD1_FUNC_GPIO81>;
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output-low;
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};
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};
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uart1_pins_runtime: uart1-runtime {
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pins-dat {
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pinmux = <MT7623_PIN_81_URXD1_FUNC_URXD1>,
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<MT7623_PIN_82_UTXD1_FUNC_UTXD1>;
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};
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};
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uart1: serial@11003000 {
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compatible = "mediatek,mt7623-uart",
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"mediatek,mt6577-uart";
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reg = <0 0x11003000 0 0x400>;
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interrupts = <GIC_SPI 52 IRQ_TYPE_LEVEL_LOW>;
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clocks = <&pericfg CLK_PERI_UART1_SEL>,
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<&pericfg CLK_PERI_UART1>;
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clock-names = "baud", "bus";
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bluetooth {
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compatible = "mediatek,mt7663u-bluetooth";
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vcc-supply = <®_5v>;
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reset-gpios = <&pio 24 GPIO_ACTIVE_LOW>;
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pinctrl-names = "default", "runtime";
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pinctrl-0 = <&uart1_pins_boot>;
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pinctrl-1 = <&uart1_pins_runtime>;
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current-speed = <921600>;
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};
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};
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