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97 lines
2.7 KiB
Diff
97 lines
2.7 KiB
Diff
From e203577bc5e6aab0b42e2d7cc25999b2e0976e0b Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.org>
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Date: Wed, 2 Mar 2016 10:59:05 +0000
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Subject: [PATCH] BCM270X_DT: Add pi3-disable-bt overlay
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Disable Bluetooth and restore UART0/ttyAMA0 over GPIOs 14 & 15. To disable
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the systemd service that initialises the modem so it doesn't use the UART:
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sudo systemctl disable hciuart
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Signed-off-by: Phil Elwell <phil@raspberrypi.org>
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---
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arch/arm/boot/dts/overlays/Makefile | 1 +
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arch/arm/boot/dts/overlays/README | 8 ++++
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.../boot/dts/overlays/pi3-disable-bt-overlay.dts | 48 ++++++++++++++++++++++
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3 files changed, 57 insertions(+)
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create mode 100644 arch/arm/boot/dts/overlays/pi3-disable-bt-overlay.dts
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--- a/arch/arm/boot/dts/overlays/Makefile
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+++ b/arch/arm/boot/dts/overlays/Makefile
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@@ -39,6 +39,7 @@ dtb-$(RPI_DT_OVERLAYS) += mcp2515-can0-o
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dtb-$(RPI_DT_OVERLAYS) += mcp2515-can1-overlay.dtb
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dtb-$(RPI_DT_OVERLAYS) += mmc-overlay.dtb
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dtb-$(RPI_DT_OVERLAYS) += mz61581-overlay.dtb
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+dtb-$(RPI_DT_OVERLAYS) += pi3-disable-bt-overlay.dtb
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dtb-$(RPI_DT_OVERLAYS) += piscreen-overlay.dtb
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dtb-$(RPI_DT_OVERLAYS) += piscreen2r-overlay.dtb
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dtb-$(RPI_DT_OVERLAYS) += pitft28-capacitive-overlay.dtb
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--- a/arch/arm/boot/dts/overlays/README
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+++ b/arch/arm/boot/dts/overlays/README
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@@ -496,6 +496,14 @@ Params: speed Display
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[ The pcf8563-rtc overlay has been deleted. See i2c-rtc. ]
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+Name: pi3-disable-bt
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+Info: Disable Pi3 Bluetooth and restore UART0/ttyAMA0 over GPIOs 14 & 15
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+ N.B. To disable the systemd service that initialises the modem so it
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+ doesn't use the UART, use 'sudo systemctl disable hciuart'.
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+Load: dtoverlay=pi3-disable-bt
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+Params: <None>
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+
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+
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Name: piscreen
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Info: PiScreen display by OzzMaker.com
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Load: dtoverlay=piscreen,<param>=<val>
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--- /dev/null
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+++ b/arch/arm/boot/dts/overlays/pi3-disable-bt-overlay.dts
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@@ -0,0 +1,48 @@
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+/dts-v1/;
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+/plugin/;
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+
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+/* Disable Bluetooth and restore UART0/ttyAMA0 over GPIOs 14 & 15.
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+ To disable the systemd service that initialises the modem so it doesn't use
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+ the UART:
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+
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+ sudo systemctl disable hciuart
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+*/
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+
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+/{
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+ compatible = "brcm,bcm2708";
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+
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+ fragment@0 {
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+ target = <&uart1>;
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+ __overlay__ {
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+ status = "disabled";
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+ };
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+ };
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+
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+ fragment@1 {
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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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+
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+ fragment@2 {
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+ target = <&gpio>;
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+ __overlay__ {
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+ uart0_pins: uart0_pins {
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+ brcm,pins = <14 15>;
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+ brcm,function = <4>; /* alt0 */
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+ brcm,pull = <0 2>;
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+ };
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+ };
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+ };
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+
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+ fragment@3 {
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+ target-path = "/aliases";
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+ __overlay__ {
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+ serial0 = "/soc/uart@7e201000";
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+ serial1 = "/soc/uart@7e215040";
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+ };
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+ };
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+};
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