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Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0841-ARM-dts-Add-Bluetooth-nodes-for-Raspberry-Pi.patch')
-rw-r--r--target/linux/bcm27xx/patches-5.4/950-0841-ARM-dts-Add-Bluetooth-nodes-for-Raspberry-Pi.patch283
1 files changed, 283 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0841-ARM-dts-Add-Bluetooth-nodes-for-Raspberry-Pi.patch b/target/linux/bcm27xx/patches-5.4/950-0841-ARM-dts-Add-Bluetooth-nodes-for-Raspberry-Pi.patch
new file mode 100644
index 0000000000..fd66e6590d
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0841-ARM-dts-Add-Bluetooth-nodes-for-Raspberry-Pi.patch
@@ -0,0 +1,283 @@
+From c46a59c99e53ab41096afcf7f7879bb12769346b Mon Sep 17 00:00:00 2001
+From: Maxim Mikityanskiy <maxtram95@gmail.com>
+Date: Sat, 27 Jun 2020 13:08:26 +0300
+Subject: [PATCH] ARM: dts: Add Bluetooth nodes for Raspberry Pi
+
+Add device tree nodes for Bluetooth on supported Raspberry Pi boards.
+It's disabled by default and can be enabled by `krnbt=on` dtparam. It's
+an alternative way of configuring Bluetooth, as compared to hciattach or
+btattach. When the dtparam is enabled, the Bluetooth driver is probed
+automatically and doesn't require any additional bring-up scripts.
+
+Note that Raspberry Pi 3 B rev 1.2 doesn't have the required hardware
+flow control pins of UART0 connected to the Bluetooth module, so the
+user should decrease the baudrate by passing `krnbt_baudrate=921600`
+dtparam to make it more stable. It resembles the behavior of the btuart
+script from Raspbian.
+
+The miniuart-bt overlay was modified to support Bluetooth probing with
+device tree, too. It's disabled by default and can be enabled by
+`krnbt=on` parameter of the miniuart-bt overlay.
+
+Signed-off-by: Maxim Mikityanskiy <maxtram95@gmail.com>
+---
+ arch/arm/boot/dts/bcm2708-rpi-bt.dtsi | 26 +++++++++++++++++++
+ arch/arm/boot/dts/bcm2708-rpi-zero-w.dts | 1 +
+ arch/arm/boot/dts/bcm2710-rpi-3-b-plus.dts | 1 +
+ arch/arm/boot/dts/bcm2710-rpi-3-b.dts | 1 +
+ arch/arm/boot/dts/bcm2711-rpi-4-b.dts | 3 +--
+ arch/arm/boot/dts/bcm271x-rpi-bt.dtsi | 26 +++++++++++++++++++
+ arch/arm/boot/dts/overlays/README | 12 +++++++--
+ .../boot/dts/overlays/disable-bt-overlay.dts | 13 ++++++++--
+ .../boot/dts/overlays/miniuart-bt-overlay.dts | 21 ++++++++++++---
+ 9 files changed, 94 insertions(+), 10 deletions(-)
+ create mode 100644 arch/arm/boot/dts/bcm2708-rpi-bt.dtsi
+ create mode 100644 arch/arm/boot/dts/bcm271x-rpi-bt.dtsi
+
+--- /dev/null
++++ b/arch/arm/boot/dts/bcm2708-rpi-bt.dtsi
+@@ -0,0 +1,26 @@
++// SPDX-License-Identifier: GPL-2.0
++
++&uart0 {
++ bt: bluetooth {
++ compatible = "brcm,bcm43438-bt";
++ max-speed = <3000000>;
++ shutdown-gpios = <&gpio 45 GPIO_ACTIVE_HIGH>;
++ status = "disabled";
++ };
++};
++
++&uart1 {
++ minibt: bluetooth {
++ compatible = "brcm,bcm43438-bt";
++ max-speed = <460800>;
++ shutdown-gpios = <&gpio 45 GPIO_ACTIVE_HIGH>;
++ status = "disabled";
++ };
++};
++
++/ {
++ __overrides__ {
++ krnbt = <&bt>,"status";
++ krnbt_baudrate = <&bt>,"max-speed:0";
++ };
++};
+--- a/arch/arm/boot/dts/bcm2708-rpi-zero-w.dts
++++ b/arch/arm/boot/dts/bcm2708-rpi-zero-w.dts
+@@ -4,6 +4,7 @@
+ #include "bcm2708-rpi.dtsi"
+ #include "bcm283x-rpi-csi1-2lane.dtsi"
+ #include "bcm283x-rpi-i2c0mux_0_28.dtsi"
++#include "bcm2708-rpi-bt.dtsi"
+
+ / {
+ compatible = "raspberrypi,model-zero-w", "brcm,bcm2835";
+--- a/arch/arm/boot/dts/bcm2710-rpi-3-b-plus.dts
++++ b/arch/arm/boot/dts/bcm2710-rpi-3-b-plus.dts
+@@ -5,6 +5,7 @@
+ #include "bcm283x-rpi-lan7515.dtsi"
+ #include "bcm283x-rpi-csi1-2lane.dtsi"
+ #include "bcm283x-rpi-i2c0mux_0_44.dtsi"
++#include "bcm271x-rpi-bt.dtsi"
+
+ / {
+ compatible = "raspberrypi,3-model-b-plus", "brcm,bcm2837";
+--- a/arch/arm/boot/dts/bcm2710-rpi-3-b.dts
++++ b/arch/arm/boot/dts/bcm2710-rpi-3-b.dts
+@@ -5,6 +5,7 @@
+ #include "bcm283x-rpi-smsc9514.dtsi"
+ #include "bcm283x-rpi-csi1-2lane.dtsi"
+ #include "bcm283x-rpi-i2c0mux_0_44.dtsi"
++#include "bcm271x-rpi-bt.dtsi"
+
+ / {
+ compatible = "raspberrypi,3-model-b", "brcm,bcm2837";
+--- a/arch/arm/boot/dts/bcm2711-rpi-4-b.dts
++++ b/arch/arm/boot/dts/bcm2711-rpi-4-b.dts
+@@ -182,6 +182,7 @@
+ // Downstream rpi- changes
+
+ #include "bcm270x.dtsi"
++#include "bcm271x-rpi-bt.dtsi"
+
+ / {
+ soc {
+@@ -250,8 +251,6 @@
+ &uart0 {
+ pinctrl-0 = <&uart0_pins &bt_pins>;
+ status = "okay";
+-
+- /delete-node/ bluetooth;
+ };
+
+ &uart1 {
+--- /dev/null
++++ b/arch/arm/boot/dts/bcm271x-rpi-bt.dtsi
+@@ -0,0 +1,26 @@
++// SPDX-License-Identifier: GPL-2.0
++
++&uart0 {
++ bt: bluetooth {
++ compatible = "brcm,bcm43438-bt";
++ max-speed = <3000000>;
++ shutdown-gpios = <&expgpio 0 GPIO_ACTIVE_HIGH>;
++ status = "disabled";
++ };
++};
++
++&uart1 {
++ minibt: bluetooth {
++ compatible = "brcm,bcm43438-bt";
++ max-speed = <460800>;
++ shutdown-gpios = <&expgpio 0 GPIO_ACTIVE_HIGH>;
++ status = "disabled";
++ };
++};
++
++/ {
++ __overrides__ {
++ krnbt = <&bt>,"status";
++ krnbt_baudrate = <&bt>,"max-speed:0";
++ };
++};
+--- a/arch/arm/boot/dts/overlays/README
++++ b/arch/arm/boot/dts/overlays/README
+@@ -162,6 +162,13 @@ Params:
+ i2s Set to "on" to enable the i2s interface
+ (default "off")
+
++ krnbt Set to "on" to enable autoprobing of Bluetooth
++ driver without need of hciattach/btattach
++ (default "off")
++
++ krnbt_baudrate Set the baudrate of the PL011 UART when used
++ with krnbt=on
++
+ spi Set to "on" to enable the spi interfaces
+ (default "off")
+
+@@ -1764,8 +1771,9 @@ Info: Switch the onboard Bluetooth fun
+ in which case use /dev/serial1 instead because it will always be
+ correct. Furthermore, you must also set core_freq and core_freq_min to
+ the same value in config.txt or the miniuart will not work.
+-Load: dtoverlay=miniuart-bt
+-Params: <None>
++Load: dtoverlay=miniuart-bt,<param>=<val>
++Params: krnbt Set to "on" to enable autoprobing of Bluetooth
++ driver without need of hciattach/btattach
+
+
+ Name: mmc
+--- a/arch/arm/boot/dts/overlays/disable-bt-overlay.dts
++++ b/arch/arm/boot/dts/overlays/disable-bt-overlay.dts
+@@ -8,6 +8,8 @@
+ sudo systemctl disable hciuart
+ */
+
++#include <dt-bindings/gpio/gpio.h>
++
+ /{
+ compatible = "brcm,bcm2835";
+
+@@ -28,6 +30,13 @@
+ };
+
+ fragment@2 {
++ target = <&bt>;
++ __overlay__ {
++ status = "disabled";
++ };
++ };
++
++ fragment@3 {
+ target = <&uart0_pins>;
+ __overlay__ {
+ brcm,pins;
+@@ -36,7 +45,7 @@
+ };
+ };
+
+- fragment@3 {
++ fragment@4 {
+ target = <&bt_pins>;
+ __overlay__ {
+ brcm,pins;
+@@ -45,7 +54,7 @@
+ };
+ };
+
+- fragment@4 {
++ fragment@5 {
+ target-path = "/aliases";
+ __overlay__ {
+ serial0 = "/soc/serial@7e201000";
+--- a/arch/arm/boot/dts/overlays/miniuart-bt-overlay.dts
++++ b/arch/arm/boot/dts/overlays/miniuart-bt-overlay.dts
+@@ -15,6 +15,8 @@
+ this overlay is used.
+ */
+
++#include <dt-bindings/gpio/gpio.h>
++
+ /{
+ compatible = "brcm,bcm2835";
+
+@@ -28,6 +30,13 @@
+ };
+
+ fragment@1 {
++ target = <&bt>;
++ __overlay__ {
++ status = "disabled";
++ };
++ };
++
++ fragment@2 {
+ target = <&uart1>;
+ __overlay__ {
+ pinctrl-names = "default";
+@@ -36,7 +45,7 @@
+ };
+ };
+
+- fragment@2 {
++ fragment@3 {
+ target = <&uart0_pins>;
+ __overlay__ {
+ brcm,pins;
+@@ -45,7 +54,7 @@
+ };
+ };
+
+- fragment@3 {
++ fragment@4 {
+ target = <&uart1_pins>;
+ __overlay__ {
+ brcm,pins = <32 33>;
+@@ -54,7 +63,7 @@
+ };
+ };
+
+- fragment@4 {
++ fragment@5 {
+ target = <&gpio>;
+ __overlay__ {
+ fake_bt_cts: fake_bt_cts {
+@@ -64,11 +73,15 @@
+ };
+ };
+
+- fragment@5 {
++ fragment@6 {
+ target-path = "/aliases";
+ __overlay__ {
+ serial0 = "/soc/serial@7e201000";
+ serial1 = "/soc/serial@7e215040";
+ };
+ };
++
++ __overrides__ {
++ krnbt = <&minibt>,"status";
++ };
+ };
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