openwrt/target/linux/bcm27xx/patches-5.4/950-0962-ARM-dts-Limit-BT-modem-baud-rate-on-3B.patch
Álvaro Fernández Rojas f07e572f64 bcm27xx: import latest patches from the RPi foundation
bcm2708: boot tested on RPi B+ v1.2
bcm2709: boot tested on RPi 3B v1.2 and RPi 4B v1.1 4G
bcm2710: boot tested on RPi 3B v1.2
bcm2711: boot tested on RPi 4B v1.1 4G

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2021-02-18 23:42:32 +01:00

29 lines
831 B
Diff

From 27f210c863d3349d41e366fb7573e9dcc0708e3d Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.com>
Date: Fri, 4 Sep 2020 09:04:29 +0100
Subject: [PATCH] ARM: dts: Limit BT modem baud rate on 3B
The 3B doesn't have the flow control signals connected to the BT modem,
which limits the maximum usable baud rate to below 1 Mbaud. Use
921600 as a relatively safe default value, but the krnbt_baudrate
parameter can still override it.
Signed-off-by: Phil Elwell <phil@raspberrypi.com>
---
arch/arm/boot/dts/bcm2710-rpi-3-b.dts | 4 ++++
1 file changed, 4 insertions(+)
--- a/arch/arm/boot/dts/bcm2710-rpi-3-b.dts
+++ b/arch/arm/boot/dts/bcm2710-rpi-3-b.dts
@@ -117,6 +117,10 @@
status = "okay";
};
+&bt {
+ max-speed = <921600>;
+};
+
&spi0 {
pinctrl-names = "default";
pinctrl-0 = <&spi0_pins &spi0_cs_pins>;