From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- .../devicetree/bindings/net/nokia-bluetooth.txt | 51 ++++++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 Documentation/devicetree/bindings/net/nokia-bluetooth.txt (limited to 'Documentation/devicetree/bindings/net/nokia-bluetooth.txt') diff --git a/Documentation/devicetree/bindings/net/nokia-bluetooth.txt b/Documentation/devicetree/bindings/net/nokia-bluetooth.txt new file mode 100644 index 000000000..42be7dc9a --- /dev/null +++ b/Documentation/devicetree/bindings/net/nokia-bluetooth.txt @@ -0,0 +1,51 @@ +Nokia Bluetooth Chips +--------------------- + +Nokia phones often come with UART connected bluetooth chips from different +vendors and modified device API. Those devices speak a protocol named H4+ +(also known as h4p) by Nokia, which is similar to the H4 protocol from the +Bluetooth standard. In addition to the H4 protocol it specifies two more +UART status lines for wakeup of UART transceivers to improve power management +and a few new packet types used to negotiate uart speed. + +Required properties: + + - compatible: should contain "nokia,h4p-bluetooth" as well as one of the following: + * "brcm,bcm2048-nokia" + * "ti,wl1271-bluetooth-nokia" + - reset-gpios: GPIO specifier, used to reset the BT module (active low) + - bluetooth-wakeup-gpios: GPIO specifier, used to wakeup the BT module (active high) + - host-wakeup-gpios: GPIO specifier, used to wakeup the host processor (active high) + - clock-names: should be "sysclk" + - clocks: should contain a clock specifier for every name in clock-names + +Optional properties: + + - None + +Example: + +/ { + /* controlled (enabled/disabled) directly by BT module */ + bluetooth_clk: vctcxo { + compatible = "fixed-clock"; + #clock-cells = <0>; + clock-frequency = <38400000>; + }; +}; + +&uart2 { + pinctrl-names = "default"; + pinctrl-0 = <&uart2_pins>; + + bluetooth { + compatible = "ti,wl1271-bluetooth-nokia", "nokia,h4p-bluetooth"; + + reset-gpios = <&gpio1 26 GPIO_ACTIVE_LOW>; /* gpio26 */ + host-wakeup-gpios = <&gpio4 5 GPIO_ACTIVE_HIGH>; /* gpio101 */ + bluetooth-wakeup-gpios = <&gpio2 5 GPIO_ACTIVE_HIGH>; /* gpio37 */ + + clocks = <&bluetooth_clk>; + clock-names = "sysclk"; + }; +}; -- cgit v1.2.3