linux-kernel - [PATCH] arm64: dts: qcom: add debug UART pins to reserved GPIO ranges on RB2

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Message-ID: <20250616143341.51944-1-brgl@bgdev.pl>
Date: Mon, 16 Jun 2025 16:33:41 +0200
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Bjorn Andersson <andersson@...nel.org>,
	Konrad Dybcio <konradybcio@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>
Cc: linux-arm-msm@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: [PATCH] arm64: dts: qcom: add debug UART pins to reserved GPIO ranges on RB2

From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>

GPIO12 and GPIO13 are used for the debug UART and must not be available
to drivers or user-space. Add them to the gpio-reserved-ranges.

Fixes: 8d58a8c0d930c ("arm64: dts: qcom: Add base qrb4210-rb2 board dts")
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
---
 arch/arm64/boot/dts/qcom/qrb4210-rb2.dts | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/qrb4210-rb2.dts b/arch/arm64/boot/dts/qcom/qrb4210-rb2.dts
index a37860175d273..384427e98dfbd 100644
--- a/arch/arm64/boot/dts/qcom/qrb4210-rb2.dts
+++ b/arch/arm64/boot/dts/qcom/qrb4210-rb2.dts
@@ -606,9 +606,8 @@ &sleep_clk {
 };
 
 &tlmm {
-	gpio-reserved-ranges = <43 2>, <49 1>, <54 1>,
-			       <56 3>, <61 2>, <64 1>,
-			       <68 1>, <72 8>, <96 1>;
+	gpio-reserved-ranges = <12 2>, <43 2>, <49 1>, <54 1>, <56 3>,
+			       <61 2>, <64 1>, <68 1>, <72 8>, <96 1>;
 
 	uart3_default: uart3-default-state {
 		cts-pins {
-- 
2.48.1