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BCM270X_DT: Add pi3-disable-bt overlay

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Disable Bluetooth and restore UART0/ttyAMA0 over GPIOs 14 & 15. To disable
the systemd service that initialises the modem so it doesn't use the UART:

       sudo systemctl disable hciuart

Signed-off-by: Phil Elwell <phil@raspberrypi.org>
This commit is contained in:
Phil Elwell
2016-03-02 10:59:05 +00:00
committed by popcornmix
parent f22f155684
commit 1807dd78b1
3 changed files with 57 additions and 0 deletions
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1
arch/arm/boot/dts/overlays/Makefile
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@@ -39,6 +39,7 @@ dtb-$(RPI_DT_OVERLAYS) += mcp2515-can0-overlay.dtb
dtb-$(RPI_DT_OVERLAYS) += mcp2515-can1-overlay.dtb dtb-$(RPI_DT_OVERLAYS) += mcp2515-can1-overlay.dtb
dtb-$(RPI_DT_OVERLAYS) += mmc-overlay.dtb dtb-$(RPI_DT_OVERLAYS) += mmc-overlay.dtb
dtb-$(RPI_DT_OVERLAYS) += mz61581-overlay.dtb dtb-$(RPI_DT_OVERLAYS) += mz61581-overlay.dtb
dtb-$(RPI_DT_OVERLAYS) += pi3-disable-bt-overlay.dtb
dtb-$(RPI_DT_OVERLAYS) += piscreen-overlay.dtb dtb-$(RPI_DT_OVERLAYS) += piscreen-overlay.dtb
dtb-$(RPI_DT_OVERLAYS) += piscreen2r-overlay.dtb dtb-$(RPI_DT_OVERLAYS) += piscreen2r-overlay.dtb
dtb-$(RPI_DT_OVERLAYS) += pitft28-capacitive-overlay.dtb dtb-$(RPI_DT_OVERLAYS) += pitft28-capacitive-overlay.dtb

8
arch/arm/boot/dts/overlays/README
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@@ -496,6 +496,14 @@ Params: speed Display SPI bus speed
[ The pcf8563-rtc overlay has been deleted. See i2c-rtc. ] [ The pcf8563-rtc overlay has been deleted. See i2c-rtc. ]
Name: pi3-disable-bt
Info: Disable Pi3 Bluetooth and restore UART0/ttyAMA0 over GPIOs 14 & 15
N.B. To disable the systemd service that initialises the modem so it
doesn't use the UART, use 'sudo systemctl disable hciuart'.
Load: dtoverlay=pi3-disable-bt
Params: <None>
Name: piscreen Name: piscreen
Info: PiScreen display by OzzMaker.com Info: PiScreen display by OzzMaker.com
Load: dtoverlay=piscreen,<param>=<val> Load: dtoverlay=piscreen,<param>=<val>

48
arch/arm/boot/dts/overlays/pi3-disable-bt-overlay.dts Normal file
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@@ -0,0 +1,48 @@
/dts-v1/;
/plugin/;
/* Disable Bluetooth and restore UART0/ttyAMA0 over GPIOs 14 & 15.
To disable the systemd service that initialises the modem so it doesn't use
the UART:
sudo systemctl disable hciuart
*/
/{
compatible = "brcm,bcm2708";
fragment@0 {
target = <&uart1>;
__overlay__ {
status = "disabled";
};
};
fragment@1 {
target = <&uart0>;
__overlay__ {
pinctrl-names = "default";
pinctrl-0 = <&uart0_pins>;
status = "okay";
};
};
fragment@2 {
target = <&gpio>;
__overlay__ {
uart0_pins: uart0_pins {
brcm,pins = <14 15>;
brcm,function = <4>; /* alt0 */
brcm,pull = <0 2>;
};
};
};
fragment@3 {
target-path = "/aliases";
__overlay__ {
serial0 = "/soc/uart@7e201000";
serial1 = "/soc/uart@7e215040";
};
};
};