From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Jan=20=C4=8Cerm=C3=A1k?= Date: Mon, 10 Aug 2026 17:43:24 +0200 Subject: [PATCH] ARM: dts: bcm2711: Enable flow control on uart1 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Indicate RTS/CTS support on uart1 (mini UART) to enable hardware flow control, implemented in [1]. Without the patch, the driver ignores the property, so the new device tree still works with older/unpatched kernel. [1] https://lore.kernel.org/linux-serial/cover.1786030659.git.sairon@sairon.cz/ Signed-off-by: Jan Čermák --- arch/arm/boot/dts/broadcom/bcm2711-rpi-cm4-ha-yellow.dts | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm/boot/dts/broadcom/bcm2711-rpi-cm4-ha-yellow.dts b/arch/arm/boot/dts/broadcom/bcm2711-rpi-cm4-ha-yellow.dts index 845a23f0bc9a..c60a0136fdc7 100644 --- a/arch/arm/boot/dts/broadcom/bcm2711-rpi-cm4-ha-yellow.dts +++ b/arch/arm/boot/dts/broadcom/bcm2711-rpi-cm4-ha-yellow.dts @@ -575,6 +575,7 @@ &uart0 { &uart1 { pinctrl-names = "default"; pinctrl-0 = <&uart1_bt_pins>; + uart-has-rtscts; status = "okay"; };