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* [PATCH v1] arm: dts: imx: Add watchdog support for early boot stages
@ 2026-05-12  2:48 alice.guo
  2026-05-12  3:01 ` Fabio Estevam
  0 siblings, 1 reply; 2+ messages in thread
From: alice.guo @ 2026-05-12  2:48 UTC (permalink / raw)
  To: Frank.Li, s.hauer; +Cc: kernel, festevam, imx, linux-arm-kernel, linux-kernel

From: Alice Guo <alice.guo@nxp.com>

Add bootph-all property to watchdog nodes to enable them in U-Boot's
early boot phases. This allows U-Boot to utilize these watchdogs for
system monitoring and reset functionality during boot.

The bootph-all property ensures these watchdog devices are available
across all U-Boot boot phases (TPL, SPL, and U-Boot proper).

Signed-off-by: Alice Guo <alice.guo@nxp.com>
---
 arch/arm/boot/dts/nxp/imx/imx7ulp.dtsi             | 11 +++++++++++
 arch/arm64/boot/dts/freescale/imx8ulp.dtsi         |  1 +
 arch/arm64/boot/dts/freescale/imx91_93_common.dtsi |  3 +++
 arch/arm64/boot/dts/freescale/imx94.dtsi           | 12 ++++++++++++
 arch/arm64/boot/dts/freescale/imx95.dtsi           | 11 +++++++++++
 arch/arm64/boot/dts/freescale/imx952.dtsi          | 11 +++++++++++
 6 files changed, 49 insertions(+)

diff --git a/arch/arm/boot/dts/nxp/imx/imx7ulp.dtsi b/arch/arm/boot/dts/nxp/imx/imx7ulp.dtsi
index 1355feda1aa7..c29a767df925 100644
--- a/arch/arm/boot/dts/nxp/imx/imx7ulp.dtsi
+++ b/arch/arm/boot/dts/nxp/imx/imx7ulp.dtsi
@@ -325,6 +325,17 @@ smc1: clock-controller@40410000 {
 			clock-names = "divcore", "hsrun_divcore";
 		};
 
+		wdog2: watchdog@40430000 {
+			compatible = "fsl,imx7ulp-wdt";
+			reg = <0x40430000 0x10000>;
+			interrupts = <GIC_SPI 56 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&pcc2 IMX7ULP_CLK_WDG2>;
+			assigned-clocks = <&pcc2 IMX7ULP_CLK_WDG2>;
+			assigned-clock-parents = <&scg1 IMX7ULP_CLK_FIRC_BUS_CLK>;
+			timeout-sec = <40>;
+			status = "disabled";
+		};
+
 		pcc3: clock-controller@40b30000 {
 			compatible = "fsl,imx7ulp-pcc3";
 			reg = <0x40b30000 0x10000>;
diff --git a/arch/arm64/boot/dts/freescale/imx8ulp.dtsi b/arch/arm64/boot/dts/freescale/imx8ulp.dtsi
index 1de3ad60c6aa..df06f03624d6 100644
--- a/arch/arm64/boot/dts/freescale/imx8ulp.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8ulp.dtsi
@@ -302,6 +302,7 @@ wdog3: watchdog@292a0000 {
 				assigned-clocks = <&pcc3 IMX8ULP_CLK_WDOG3>;
 				assigned-clock-parents = <&cgc1 IMX8ULP_CLK_SOSC_DIV2>;
 				timeout-sec = <40>;
+				bootph-all;
 			};
 
 			cgc1: clock-controller@292c0000 {
diff --git a/arch/arm64/boot/dts/freescale/imx91_93_common.dtsi b/arch/arm64/boot/dts/freescale/imx91_93_common.dtsi
index 46a5d2df074d..a1a7e6a0571b 100644
--- a/arch/arm64/boot/dts/freescale/imx91_93_common.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx91_93_common.dtsi
@@ -525,6 +525,7 @@ wdog3: watchdog@42490000 {
 				clocks = <&clk IMX93_CLK_WDOG3_GATE>;
 				timeout-sec = <40>;
 				status = "disabled";
+				bootph-all;
 			};
 
 			wdog4: watchdog@424a0000 {
@@ -534,6 +535,7 @@ wdog4: watchdog@424a0000 {
 				clocks = <&clk IMX93_CLK_WDOG4_GATE>;
 				timeout-sec = <40>;
 				status = "disabled";
+				bootph-all;
 			};
 
 			wdog5: watchdog@424b0000 {
@@ -543,6 +545,7 @@ wdog5: watchdog@424b0000 {
 				clocks = <&clk IMX93_CLK_WDOG5_GATE>;
 				timeout-sec = <40>;
 				status = "disabled";
+				bootph-all;
 			};
 
 			tpm3: pwm@424e0000 {
diff --git a/arch/arm64/boot/dts/freescale/imx94.dtsi b/arch/arm64/boot/dts/freescale/imx94.dtsi
index c460ece6070f..9420519b5be1 100644
--- a/arch/arm64/boot/dts/freescale/imx94.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx94.dtsi
@@ -1283,6 +1283,18 @@ wdog3: watchdog@49220000 {
 				timeout-sec = <40>;
 				fsl,ext-reset-output;
 				status = "disabled";
+				bootph-all;
+			};
+
+			wdog4: watchdog@49230000 {
+				compatible = "fsl,imx94-wdt", "fsl,imx93-wdt";
+				reg = <0x49230000 0x10000>;
+				interrupts = <GIC_SPI 91 IRQ_TYPE_LEVEL_HIGH>;
+				clocks = <&scmi_clk IMX94_CLK_BUSWAKEUP>;
+				timeout-sec = <40>;
+				fsl,ext-reset-output;
+				status = "disabled";
+				bootph-all;
 			};
 		};
 
diff --git a/arch/arm64/boot/dts/freescale/imx95.dtsi b/arch/arm64/boot/dts/freescale/imx95.dtsi
index 71394871d8dd..7caacdc819c4 100644
--- a/arch/arm64/boot/dts/freescale/imx95.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx95.dtsi
@@ -795,6 +795,17 @@ wdog3: watchdog@42490000 {
 				clocks = <&scmi_clk IMX95_CLK_BUSWAKEUP>;
 				timeout-sec = <40>;
 				status = "disabled";
+				bootph-all;
+			};
+
+			wdog4: watchdog@424a0000 {
+				compatible = "fsl,imx93-wdt";
+				reg = <0x424a0000 0x10000>;
+				interrupts = <GIC_SPI 78 IRQ_TYPE_LEVEL_HIGH>;
+				clocks = <&scmi_clk IMX95_CLK_BUSWAKEUP>;
+				timeout-sec = <40>;
+				status = "disabled";
+				bootph-all;
 			};
 
 			tpm3: pwm@424e0000 {
diff --git a/arch/arm64/boot/dts/freescale/imx952.dtsi b/arch/arm64/boot/dts/freescale/imx952.dtsi
index b30707837f35..59f829004000 100644
--- a/arch/arm64/boot/dts/freescale/imx952.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx952.dtsi
@@ -349,6 +349,17 @@ wdog3: watchdog@420b0000 {
 				clocks = <&scmi_clk IMX952_CLK_BUSWAKEUP>;
 				timeout-sec = <40>;
 				status = "disabled";
+				bootph-all;
+			};
+
+			wdog4: watchdog@420c0000 {
+				compatible = "fsl,imx93-wdt";
+				reg = <0x420c0000 0x10000>;
+				interrupts = <GIC_SPI 78 IRQ_TYPE_LEVEL_HIGH>;
+				clocks = <&scmi_clk IMX952_CLK_BUSWAKEUP>;
+				timeout-sec = <40>;
+				status = "disabled";
+				bootph-all;
 			};
 
 			tpm3: pwm@42100000 {
-- 
2.34.1



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2026-05-12  2:48 [PATCH v1] arm: dts: imx: Add watchdog support for early boot stages alice.guo
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