linux-kernel - [PATCH v3 2/2] arm64: dts: rockchip: fix pinmux of UART5 for PX30 Ringneck on Haikou

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Message-Id: <20250225-ringneck-dtbos-v3-2-853a9a6dd597@cherry.de>
Date: Tue, 25 Feb 2025 12:53:30 +0100
From: Quentin Schulz <foss+kernel@...il.net>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Heiko Stuebner <heiko@...ech.de>, 
 Quentin Schulz <quentin.schulz@...obroma-systems.com>, 
 Farouk Bouabid <farouk.bouabid@...obroma-systems.com>
Cc: devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 Quentin Schulz <quentin.schulz@...rry.de>, stable@...r.kernel.org
Subject: [PATCH v3 2/2] arm64: dts: rockchip: fix pinmux of UART5 for PX30
 Ringneck on Haikou

From: Quentin Schulz <quentin.schulz@...rry.de>

UART5 uses GPIO0_B5 as UART RTS but muxed in its GPIO function,
therefore UART5 must request this pin to be muxed in that function, so
let's do that.

Fixes: 5963d97aa780 ("arm64: dts: rockchip: add rs485 support on uart5 of px30-ringneck-haikou")
Cc: stable@...r.kernel.org
Signed-off-by: Quentin Schulz <quentin.schulz@...rry.de>
---
 arch/arm64/boot/dts/rockchip/px30-ringneck-haikou.dts | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/px30-ringneck-haikou.dts b/arch/arm64/boot/dts/rockchip/px30-ringneck-haikou.dts
index 9a568f3d0a9916dff22222c59e5e0c94ce226858..0e0d7b755b8733ff03083665f76807cc6954ca3e 100644
--- a/arch/arm64/boot/dts/rockchip/px30-ringneck-haikou.dts
+++ b/arch/arm64/boot/dts/rockchip/px30-ringneck-haikou.dts
@@ -194,6 +194,13 @@ sd_card_led_pin: sd-card-led-pin {
 			  <3 RK_PB3 RK_FUNC_GPIO &pcfg_pull_none>;
 		};
 	};
+
+	uart {
+		uart5_rts_pin: uart5-rts-pin {
+			rockchip,pins =
+			  <0 RK_PB5 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+	};
 };
 
 &pwm0 {
@@ -227,6 +234,8 @@ &uart0 {
 };
 
 &uart5 {
+	/* Add pinmux for rts-gpios (uart5_rts_pin) */
+	pinctrl-0 = <&uart5_xfer &uart5_rts_pin>;
 	rts-gpios = <&gpio0 RK_PB5 GPIO_ACTIVE_HIGH>;
 	status = "okay";
 };

-- 
2.48.1