[PATCH 0/3] Add SCMI regulators description on STM32MP21

[PATCH 0/3] Add SCMI regulators description on STM32MP21

[Patrick Delaunay]

Add the description for SCMI regulators provided by OP-TEE firmware.
The binding file named st,stm32mp21-regulator.h will be also used in
the OP-TEE firmware.



Patrick Delaunay (3):
  dt-bindings: add STM32MP21 regulator bindings
  arm64: dts: st: add SCMI voltage domain regulators for STM32MP211
  arm64: dts: st: add SCMI regulators for stm32mp215f-dk board

 arch/arm64/boot/dts/st/stm32mp211.dtsi        | 27 +++++++++++
 arch/arm64/boot/dts/st/stm32mp215f-dk.dts     | 23 +++++++++
 .../regulator/st,stm32mp21-regulator.h        | 48 +++++++++++++++++++
 3 files changed, 98 insertions(+)
 create mode 100644 include/dt-bindings/regulator/st,stm32mp21-regulator.h

---
base-commit: 7475ea8b58616b33c04afb976cf0fbaad9dd63fb
branch: fsdffsf

-- 
2.43.0

[PATCH 1/3] dt-bindings: add STM32MP21 regulator bindings

[Patrick Delaunay]

These bindings will be used for the SCMI voltage domain.

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
---

 .../regulator/st,stm32mp21-regulator.h        | 48 +++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100644 include/dt-bindings/regulator/st,stm32mp21-regulator.h

diff --git a/include/dt-bindings/regulator/st,stm32mp21-regulator.h b/include/dt-bindings/regulator/st,stm32mp21-regulator.h
new file mode 100644
index 000000000000..fcafcfb6dc54
--- /dev/null
+++ b/include/dt-bindings/regulator/st,stm32mp21-regulator.h
@@ -0,0 +1,48 @@
+/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) */
+/*
+ * Copyright (C) 2026, STMicroelectronics - All Rights Reserved
+ */
+
+#ifndef __DT_BINDINGS_REGULATOR_ST_STM32MP21_REGULATOR_H
+#define __DT_BINDINGS_REGULATOR_ST_STM32MP21_REGULATOR_H
+
+/* SCMI voltage domains identifiers */
+
+/* SOC Internal regulators */
+#define VOLTD_SCMI_VDDIO1		0
+#define VOLTD_SCMI_VDDIO2		1
+#define VOLTD_SCMI_VDDIO3		2
+#define VOLTD_SCMI_ADC			3
+#define VOLTD_SCMI_VREFBUF		4
+
+/* STPMIC regulators (STPMIC25/STM32MP2L/STPMIC1L) */
+#define VOLTD_SCMI_STPMIC_BUCK1		5
+#define VOLTD_SCMI_STPMIC_BUCK2		6
+#define VOLTD_SCMI_STPMIC_BUCK3		7
+#define VOLTD_SCMI_STPMIC_BUCK4		8
+#define VOLTD_SCMI_STPMIC_BUCK5		9
+#define VOLTD_SCMI_STPMIC_BUCK6		10
+#define VOLTD_SCMI_STPMIC_BUCK7		11
+#define VOLTD_SCMI_STPMIC_LDO1		12
+#define VOLTD_SCMI_STPMIC_LDO2		13
+#define VOLTD_SCMI_STPMIC_LDO3		14
+#define VOLTD_SCMI_STPMIC_LDO4		15
+#define VOLTD_SCMI_STPMIC_LDO5		16
+#define VOLTD_SCMI_STPMIC_LDO6		17
+#define VOLTD_SCMI_STPMIC_LDO7		18
+#define VOLTD_SCMI_STPMIC_LDO8		19
+#define VOLTD_SCMI_STPMIC_REFDDR	20
+#define VOLTD_SCMI_STPMIC_GPO1		21
+#define VOLTD_SCMI_STPMIC_GPO2		22
+#define VOLTD_SCMI_STPMIC_GPO3		23
+#define VOLTD_SCMI_STPMIC_GPO4		24
+#define VOLTD_SCMI_STPMIC_GPO5		25
+
+/* External regulators */
+#define VOLTD_SCMI_REGU0		26
+#define VOLTD_SCMI_REGU1		27
+#define VOLTD_SCMI_REGU2		28
+#define VOLTD_SCMI_REGU3		29
+#define VOLTD_SCMI_REGU4		30
+
+#endif /*__DT_BINDINGS_REGULATOR_ST_STM32MP21_REGULATOR_H */
-- 
2.43.0

[PATCH 2/3] arm64: dts: st: add SCMI voltage domain regulators for STM32MP211

[Patrick Delaunay]

Add SCMI-based regulator descriptions in the STM32MP211 SoC DTS,
covering VDDIO1, VDDIO2, VDDIO3 and VDDA18ADC voltage domains.

These regulators are exposed through the SCMI voltage protocol
and will be referenced by board-level DTS files.

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
---

 arch/arm64/boot/dts/st/stm32mp211.dtsi | 27 ++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/arch/arm64/boot/dts/st/stm32mp211.dtsi b/arch/arm64/boot/dts/st/stm32mp211.dtsi
index 4bfd58b26b51..8ae19e1aedcc 100644
--- a/arch/arm64/boot/dts/st/stm32mp211.dtsi
+++ b/arch/arm64/boot/dts/st/stm32mp211.dtsi
@@ -4,6 +4,7 @@
  * Author: Alexandre Torgue <alexandre.torgue@foss.st.com> for STMicroelectronics.
  */
 #include <dt-bindings/interrupt-controller/arm-gic.h>
+#include <dt-bindings/regulator/st,stm32mp21-regulator.h>
 
 / {
 	#address-cells = <2>;
@@ -67,6 +68,32 @@ scmi_reset: protocol@16 {
 				reg = <0x16>;
 				#reset-cells = <1>;
 			};
+
+			scmi_voltd: protocol@17 {
+				reg = <0x17>;
+
+				scmi_regu: regulators {
+					#address-cells = <1>;
+					#size-cells = <0>;
+
+					scmi_vddio1: regulator@0 {
+						reg = <VOLTD_SCMI_VDDIO1>;
+						regulator-name = "vddio1";
+					};
+					scmi_vddio2: regulator@1 {
+						reg = <VOLTD_SCMI_VDDIO2>;
+						regulator-name = "vddio2";
+					};
+					scmi_vddio3: regulator@2 {
+						reg = <VOLTD_SCMI_VDDIO3>;
+						regulator-name = "vddio3";
+					};
+					scmi_vdda18adc: regulator@3 {
+						reg = <VOLTD_SCMI_ADC>;
+						regulator-name = "vdda18adc";
+					};
+				};
+			};
 		};
 	};
 
-- 
2.43.0

[PATCH 3/3] arm64: dts: st: add SCMI regulators for stm32mp215f-dk board

[Patrick Delaunay]

Add SCMI-based regulator nodes:
- vddcore (BUCK1)
- vdd3v3_usb (LDO4)
- vdd_flash (LDO5)
- vdda_1v8 (LDO6)
- v3v3 (GPO1)

These regulators are provided through the SCMI voltage protocol
and will be used by on-board peripherals.

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
---

 arch/arm64/boot/dts/st/stm32mp215f-dk.dts | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/arch/arm64/boot/dts/st/stm32mp215f-dk.dts b/arch/arm64/boot/dts/st/stm32mp215f-dk.dts
index a1285abc80ca..fc7010bf8d88 100644
--- a/arch/arm64/boot/dts/st/stm32mp215f-dk.dts
+++ b/arch/arm64/boot/dts/st/stm32mp215f-dk.dts
@@ -48,6 +48,29 @@ &bsec {
 	bootph-all;
 };
 
+&scmi_regu {
+	scmi_vddcore: regulator@5 {
+		reg = <VOLTD_SCMI_STPMIC_BUCK1>;
+		regulator-name = "vddcore";
+	};
+	scmi_vdd3v3_usb: regulator@f {
+		reg = <VOLTD_SCMI_STPMIC_LDO4>;
+		regulator-name = "vdd3v3_usb";
+	};
+	scmi_vdd_flash: regulator@10 {
+		reg = <VOLTD_SCMI_STPMIC_LDO5>;
+		regulator-name = "vdd_flash";
+	};
+	scmi_vdda_1v8: regulator@11 {
+		reg = <VOLTD_SCMI_STPMIC_LDO6>;
+		regulator-name = "vdda_1v8";
+	};
+	scmi_v3v3: regulator@15 {
+		reg = <VOLTD_SCMI_STPMIC_GPO1>;
+		regulator-name = "v3v3";
+	};
+};
+
 &usart2 {
 	status = "okay";
 };
-- 
2.43.0

Re: [PATCH 1/3] dt-bindings: add STM32MP21 regulator bindings

[Mark Brown]

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On Fri, Nov 13, 2026 at 03:10:39PM +0100, Patrick Delaunay wrote:

> These bindings will be used for the SCMI voltage domain.

Please submit patches using subject lines reflecting the style for the
subsystem, this makes it easier for people to identify relevant patches.
Look at what existing commits in the area you're changing are doing and
make sure your subject lines visually resemble what they're doing.
There's no need to resubmit to fix this alone.

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