dt-bindings: regulator: Add STM32MP15 SCMI regulator identifiers

These bindings will be used for the SCMI voltage domain.

Signed-off-by: Etienne Carriere <[e-mail]>
Signed-off-by: Pascal Paillet <[e-mail]>
Signed-off-by: Amelie Delaunay <[e-mail]>
Acked-by: Rob Herring (Arm) <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Alexandre Torgue <[e-mail]>

include/dt-bindings/regulator/st,stm32mp15-regulator.h

···
+/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
+/*
+ * Copyright (C) 2025, STMicroelectronics - All Rights Reserved
+ */
+
+#ifndef __DT_BINDINGS_REGULATOR_ST_STM32MP15_REGULATOR_H
+#define __DT_BINDINGS_REGULATOR_ST_STM32MP15_REGULATOR_H
+
+/* SCMI voltage domain identifiers */
+
+/* SOC Internal regulators */
+#define VOLTD_SCMI_REG11		0
+#define VOLTD_SCMI_REG18		1
+#define VOLTD_SCMI_USB33		2
+
+/* STPMIC1 regulators */
+#define VOLTD_SCMI_STPMIC1_BUCK1	3
+#define VOLTD_SCMI_STPMIC1_BUCK2	4
+#define VOLTD_SCMI_STPMIC1_BUCK3	5
+#define VOLTD_SCMI_STPMIC1_BUCK4	6
+#define VOLTD_SCMI_STPMIC1_LDO1		7
+#define VOLTD_SCMI_STPMIC1_LDO2		8
+#define VOLTD_SCMI_STPMIC1_LDO3		9
+#define VOLTD_SCMI_STPMIC1_LDO4		10
+#define VOLTD_SCMI_STPMIC1_LDO5		11
+#define VOLTD_SCMI_STPMIC1_LDO6		12
+#define VOLTD_SCMI_STPMIC1_VREFDDR	13
+#define VOLTD_SCMI_STPMIC1_BOOST	14
+#define VOLTD_SCMI_STPMIC1_PWR_SW1	15
+#define VOLTD_SCMI_STPMIC1_PWR_SW2	16
+#define VOLTD_SCMI_VREFBUF		17
+
+/* External regulators */
+#define VOLTD_SCMI_REGU0		18
+#define VOLTD_SCMI_REGU1		19
+#define VOLTD_SCMI_REGU2		20
+#define VOLTD_SCMI_REGU3		21
+#define VOLTD_SCMI_REGU4		22
+
+#endif /*__DT_BINDINGS_REGULATOR_ST_STM32MP15_REGULATOR_H */