linux-kernel - [PATCH 07/11] arm: dts: stm32: enable the debug bus on stm32mp1x boards

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Message-ID: <20260109-debug_bus-v1-7-8f2142b5a738@foss.st.com>
Date: Fri, 9 Jan 2026 11:55:07 +0100
From: Gatien Chevallier <gatien.chevallier@...s.st.com>
To: Suzuki K Poulose <suzuki.poulose@....com>,
        Mike Leach
	<mike.leach@...aro.org>,
        James Clark <james.clark@...aro.org>, Rob Herring
	<robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
	<conor+dt@...nel.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Leo Yan
	<leo.yan@...ux.dev>,
        Clément Le Goffic
	<legoffic.clement@...il.com>,
        Linus Walleij <linusw@...nel.org>,
        "Maxime
 Coquelin" <mcoquelin.stm32@...il.com>,
        Alexandre Torgue
	<alexandre.torgue@...s.st.com>
CC: <coresight@...ts.linaro.org>, <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-gpio@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        Gatien Chevallier <gatien.chevallier@...s.st.com>
Subject: [PATCH 07/11] arm: dts: stm32: enable the debug bus on stm32mp1x
 boards

On stm32mp1x boards, enable the debug bus so we always try to probe
the debug peripherals, if their status and the debug configuration
allow it.

Signed-off-by: Gatien Chevallier <gatien.chevallier@...s.st.com>
---
 arch/arm/boot/dts/st/stm32mp135f-dk.dts   | 4 ++++
 arch/arm/boot/dts/st/stm32mp157c-ev1.dts  | 4 ++++
 arch/arm/boot/dts/st/stm32mp15xx-dkx.dtsi | 4 ++++
 3 files changed, 12 insertions(+)

diff --git a/arch/arm/boot/dts/st/stm32mp135f-dk.dts b/arch/arm/boot/dts/st/stm32mp135f-dk.dts
index f894ee35b3db..ebc719797271 100644
--- a/arch/arm/boot/dts/st/stm32mp135f-dk.dts
+++ b/arch/arm/boot/dts/st/stm32mp135f-dk.dts
@@ -174,6 +174,10 @@ &cryp {
 	status = "okay";
 };
 
+&dbg_bus {
+	status = "okay";
+};
+
 &dcmipp {
 	pinctrl-names = "default", "sleep";
 	pinctrl-0 = <&dcmipp_pins_a>;
diff --git a/arch/arm/boot/dts/st/stm32mp157c-ev1.dts b/arch/arm/boot/dts/st/stm32mp157c-ev1.dts
index 8f99c30f1af1..e69c8e282c8b 100644
--- a/arch/arm/boot/dts/st/stm32mp157c-ev1.dts
+++ b/arch/arm/boot/dts/st/stm32mp157c-ev1.dts
@@ -81,6 +81,10 @@ &cec {
 	status = "okay";
 };
 
+&dbg_bus {
+	status = "okay";
+};
+
 &dcmi {
 	status = "okay";
 	pinctrl-names = "default", "sleep";
diff --git a/arch/arm/boot/dts/st/stm32mp15xx-dkx.dtsi b/arch/arm/boot/dts/st/stm32mp15xx-dkx.dtsi
index 8cea6facd27b..fe2ab07ea4a8 100644
--- a/arch/arm/boot/dts/st/stm32mp15xx-dkx.dtsi
+++ b/arch/arm/boot/dts/st/stm32mp15xx-dkx.dtsi
@@ -140,6 +140,10 @@ &crc1 {
 	status = "okay";
 };
 
+&dbg_bus {
+	status = "okay";
+};
+
 &dts {
 	status = "okay";
 };

-- 
2.43.0