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94 lines
1.8 KiB
Plaintext
94 lines
1.8 KiB
Plaintext
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/dts-v1/;
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/plugin/;
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/* Switch Pi3 Bluetooth function to use the mini-UART (ttyS0) and restore
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UART0/ttyAMA0 over GPIOs 14 & 15. Note that this may reduce the maximum
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usable baudrate.
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It is also necessary to edit /lib/systemd/system/hciuart.service and
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replace ttyAMA0 with ttyS0, unless you have a system with udev rules
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that create /dev/serial0 and /dev/serial1, in which case use /dev/serial1
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instead because it will always be correct.
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If cmdline.txt uses the alias serial0 to refer to the user-accessable port
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then the firmware will replace with the appropriate port whether or not
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this overlay is used.
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*/
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#include <dt-bindings/gpio/gpio.h>
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/{
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compatible = "brcm,bcm2835";
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fragment@0 {
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target = <&uart0>;
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__overlay__ {
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pinctrl-names = "default";
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pinctrl-0 = <&uart0_pins>;
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status = "okay";
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};
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};
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fragment@1 {
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target = <&bt>;
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__overlay__ {
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status = "disabled";
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};
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};
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fragment@2 {
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target = <&uart1>;
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__overlay__ {
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pinctrl-names = "default";
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pinctrl-0 = <&uart1_pins &bt_pins &fake_bt_cts>;
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status = "okay";
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};
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};
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fragment@3 {
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target = <&uart0_pins>;
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__overlay__ {
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brcm,pins;
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brcm,function;
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brcm,pull;
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};
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};
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fragment@4 {
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target = <&uart1_pins>;
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__overlay__ {
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brcm,pins = <32 33>;
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brcm,function = <2>; /* alt5=UART1 */
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brcm,pull = <0 2>;
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};
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};
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fragment@5 {
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target = <&gpio>;
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__overlay__ {
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fake_bt_cts: fake_bt_cts {
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brcm,pins = <31>;
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brcm,function = <1>; /* output */
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};
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};
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};
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fragment@6 {
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target-path = "/aliases";
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__overlay__ {
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serial0 = "/soc/serial@7e201000";
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serial1 = "/soc/serial@7e215040";
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};
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};
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fragment@7 {
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target = <&minibt>;
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minibt_frag: __overlay__ {
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};
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};
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__overrides__ {
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krnbt = <&minibt_frag>,"status";
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};
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};
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