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ARM: dts: da850-lego-ev3: Add Bluetooth nodes 

This adds nodes for describing the Bluetooth chip and connections on
LEGO MINDSTORMS EV3 to da850-lego-ev3.dts.

Signed-off-by: David Lechner <david@lechnology.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
This commit is contained in:
David Lechner 2018-05-31 15:25:48 -05:00 committed by Sekhar Nori
parent 097f0987eb
commit 4729bef965
1 changed files with 82 additions and 0 deletions
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82
arch/arm/boot/dts/da850-lego-ev3.dts
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@ -173,6 +173,15 @@ battery {
rechargeable-gpios = <&gpio 136 GPIO_ACTIVE_LOW>;
};
bt_slow_clk: bt-clock {
pinctrl-names = "default";
pinctrl-0 = <&ecap2_pins>, <&bt_clock_bias>;
compatible = "pwm-clock";
#clock-cells = <0>;
clock-frequency = <32768>;
pwms = <&ecap2 0 30518 0>;
};
/* ARM local RAM */
memory@ffff0000 {
compatible = "syscon", "simple-mfd";
@ -216,6 +225,20 @@ disable {
bias-disable;
};
};
bt_clock_bias: bt-clock-bias-groups {
disable {
groups = "cp2";
bias-disable;
};
};
bt_pic_bias: bt-pic-bias-groups {
disable {
groups = "cp20";
bias-disable;
};
};
};
/* Input port 1 */
@ -225,6 +248,22 @@ &serial1 {
pinctrl-0 = <&serial1_rxtx_pins>;
};
&serial2 {
pinctrl-names = "default";
pinctrl-0 = <&serial2_rxtx_pins>, <&serial2_rtscts_pins>, <&bt_pic_bias>;
status = "okay";
bluetooth {
compatible = "ti,cc2560";
clocks = <&bt_slow_clk>;
clock-names = "ext_clock";
enable-gpios = <&gpio 73 GPIO_ACTIVE_HIGH>;
max-speed = <2000000>;
nvmem-cells = <&bdaddr>;
nvmem-cell-names = "bd-address";
};
};
&rtc0 {
status = "okay";
};
@ -243,6 +282,12 @@ eeprom@50 {
pagesize = <64>;
read-only;
reg = <0x50>;
#address-cells = <1>;
#size-cells = <1>;
bdaddr: bdaddr@3f06 {
reg = <0x3f06 0x06>;
};
};
};
@ -327,6 +372,10 @@ display@0{
};
};
&ecap2 {
status = "okay";
};
&ehrpwm0 {
status = "okay";
};
@ -340,6 +389,39 @@ batt_volt_en {
gpios = <6 GPIO_ACTIVE_HIGH>;
output-high;
};
/* Don't impede Bluetooth clock signal */
bt_clock_en {
gpio-hog;
gpios = <5 GPIO_ACTIVE_HIGH>;
input;
};
/*
* There is a PIC microcontroller for interfacing with an Apple MFi
* chip. This interferes with normal Bluetooth operation, so we need
* to make sure it is turned off. Note: The publicly available
* schematics from LEGO don't show that these pins are connected to
* anything, but they are present in the source code from LEGO.
*/
bt_pic_en {
gpio-hog;
gpios = <51 GPIO_ACTIVE_HIGH>;
output-low;
};
bt_pic_rst {
gpio-hog;
gpios = <78 GPIO_ACTIVE_HIGH>;
output-high;
};
bt_pic_cts {
gpio-hog;
gpios = <87 GPIO_ACTIVE_HIGH>;
input;
};
};
&usb_phy {