Documentation/devicetree/bindings/net/mediatek-bluetooth.txt

   1 MediaTek SoC built-in Bluetooth Devices
   2 ==================================
   3
   4 This device is a serial attached device to BTIF device and thus it must be a
   5 child node of the serial node with BTIF. The dt-bindings details for BTIF
   6 device can be known via Documentation/devicetree/bindings/serial/8250.txt.
   7
   8 Required properties:
   9
  10 - compatible:   Must be
  11                   "mediatek,mt7622-bluetooth": for MT7622 SoC
  12 - clocks:       Should be the clock specifiers corresponding to the entry in
  13                 clock-names property.
  14 - clock-names:  Should contain "ref" entries.
  15 - power-domains: Phandle to the power domain that the device is part of
  16
  17 Example:
  18
  19         btif: serial@1100c000 {
  20                 compatible = "mediatek,mt7622-btif",
  21                              "mediatek,mtk-btif";
  22                 reg = <0 0x1100c000 0 0x1000>;
  23                 interrupts = <GIC_SPI 90 IRQ_TYPE_LEVEL_LOW>;
  24                 clocks = <&pericfg CLK_PERI_BTIF_PD>;
  25                 clock-names = "main";
  26                 reg-shift = <2>;
  27                 reg-io-width = <4>;
  28
  29                 bluetooth {
  30                         compatible = "mediatek,mt7622-bluetooth";
  31                         power-domains = <&scpsys MT7622_POWER_DOMAIN_WB>;
  32                         clocks = <&clk25m>;
  33                         clock-names = "ref";
  34                 };
  35         };
  36
  37 MediaTek UART based Bluetooth Devices
  38 ==================================
  39
  40 This device is a serial attached device to UART device and thus it must be a
  41 child node of the serial node with UART.
  42
  43 Please refer to the following documents for generic properties:
  44
  45         Documentation/devicetree/bindings/serial/slave-device.txt
  46
  47 Required properties:
  48
  49 - compatible:   Must be
  50                   "mediatek,mt7663u-bluetooth": for MT7663U device
  51                   "mediatek,mt7668u-bluetooth": for MT7668U device
  52 - vcc-supply:   Main voltage regulator
  53 - pinctrl-names: Should be "default", "runtime"
  54 - pinctrl-0: Should contain UART RXD low when the device is powered up to
  55              enter proper bootstrap mode.
  56 - pinctrl-1: Should contain UART mode pin ctrl
  57
  58 Optional properties:
  59
  60 - reset-gpios:  GPIO used to reset the device whose initial state keeps low,
  61                 if the GPIO is missing, then board-level design should be
  62                 guaranteed.
  63 - current-speed:  Current baud rate of the device whose defaults to 921600
  64
  65 Example:
  66
  67         uart1_pins_boot: uart1-default {
  68                 pins-dat {
  69                         pinmux = <MT7623_PIN_81_URXD1_FUNC_GPIO81>;
  70                         output-low;
  71                 };
  72         };
  73
  74         uart1_pins_runtime: uart1-runtime {
  75                 pins-dat {
  76                         pinmux = <MT7623_PIN_81_URXD1_FUNC_URXD1>,
  77                                  <MT7623_PIN_82_UTXD1_FUNC_UTXD1>;
  78                 };
  79         };
  80
  81         uart1: serial@11003000 {
  82                 compatible = "mediatek,mt7623-uart",
  83                              "mediatek,mt6577-uart";
  84                 reg = <0 0x11003000 0 0x400>;
  85                 interrupts = <GIC_SPI 52 IRQ_TYPE_LEVEL_LOW>;
  86                 clocks = <&pericfg CLK_PERI_UART1_SEL>,
  87                          <&pericfg CLK_PERI_UART1>;
  88                 clock-names = "baud", "bus";
  89
  90                 bluetooth {
  91                         compatible = "mediatek,mt7663u-bluetooth";
  92                         vcc-supply = <&reg_5v>;
  93                         reset-gpios = <&pio 24 GPIO_ACTIVE_LOW>;
  94                         pinctrl-names = "default", "runtime";
  95                         pinctrl-0 = <&uart1_pins_boot>;
  96                         pinctrl-1 = <&uart1_pins_runtime>;
  97                         current-speed = <921600>;
  98                 };
  99         };