linux-hardening - [PATCH 13/25] dts: unisoc: orangepi: Disable UART with no users

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Message-Id: <20250917-rda8810pl-drivers-v1-13-9ca9184ca977@mainlining.org>
Date: Wed, 17 Sep 2025 03:25:10 +0700
From: Dang Huynh via B4 Relay <devnull+dang.huynh.mainlining.org@...nel.org>
To: Manivannan Sadhasivam <mani@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Linus Walleij <linus.walleij@...aro.org>, 
 Bartosz Golaszewski <brgl@...ev.pl>, 
 Alexandre Belloni <alexandre.belloni@...tlin.com>, 
 Michael Turquette <mturquette@...libre.com>, 
 Stephen Boyd <sboyd@...nel.org>, Philipp Zabel <p.zabel@...gutronix.de>, 
 Sebastian Reichel <sre@...nel.org>, Vinod Koul <vkoul@...nel.org>, 
 Kees Cook <kees@...nel.org>, "Gustavo A. R. Silva" <gustavoars@...nel.org>, 
 Ulf Hansson <ulf.hansson@...aro.org>
Cc: linux-arm-kernel@...ts.infradead.org, linux-unisoc@...ts.infradead.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-gpio@...r.kernel.org, linux-rtc@...r.kernel.org, 
 linux-clk@...r.kernel.org, linux-pm@...r.kernel.org, 
 dmaengine@...r.kernel.org, linux-hardening@...r.kernel.org, 
 linux-mmc@...r.kernel.org, Dang Huynh <dang.huynh@...nlining.org>
Subject: [PATCH 13/25] dts: unisoc: orangepi: Disable UART with no users

From: Dang Huynh <dang.huynh@...nlining.org>

By default, we should keep unused peripherals disabled.

Signed-off-by: Dang Huynh <dang.huynh@...nlining.org>
---
 arch/arm/boot/dts/unisoc/rda8810pl-orangepi-2g-iot.dts | 10 ----------
 arch/arm/boot/dts/unisoc/rda8810pl-orangepi-i96.dts    | 10 ----------
 2 files changed, 20 deletions(-)

diff --git a/arch/arm/boot/dts/unisoc/rda8810pl-orangepi-2g-iot.dts b/arch/arm/boot/dts/unisoc/rda8810pl-orangepi-2g-iot.dts
index 98e34248ae80b1fcd673ff01fe045db412d5bcc9..46ccb9ad510c0df142b845d6fc5633b69c2298dd 100644
--- a/arch/arm/boot/dts/unisoc/rda8810pl-orangepi-2g-iot.dts
+++ b/arch/arm/boot/dts/unisoc/rda8810pl-orangepi-2g-iot.dts
@@ -34,16 +34,6 @@ uart_clk: uart-clk {
 	};
 };

-&uart1 {
-	status = "okay";
-	clocks = <&uart_clk>;
-};
-
-&uart2 {
-	status = "okay";
-	clocks = <&uart_clk>;
-};
-
 &uart3 {
 	status = "okay";
 	clocks = <&uart_clk>;
diff --git a/arch/arm/boot/dts/unisoc/rda8810pl-orangepi-i96.dts b/arch/arm/boot/dts/unisoc/rda8810pl-orangepi-i96.dts
index 728f76931b995fdfc036b586f899b15a7f07528b..a1d61ef138d12bb3ecb4b24513cc1a7dfbac3107 100644
--- a/arch/arm/boot/dts/unisoc/rda8810pl-orangepi-i96.dts
+++ b/arch/arm/boot/dts/unisoc/rda8810pl-orangepi-i96.dts
@@ -34,16 +34,6 @@ uart_clk: uart-clk {
 	};
 };

-&uart1 {
-	status = "okay";
-	clocks = <&uart_clk>;
-};
-
-&uart2 {
-	status = "okay";
-	clocks = <&uart_clk>;
-};
-
 &uart3 {
 	status = "okay";
 	clocks = <&uart_clk>;

-- 
2.51.0