arm64: dts: st: introduce stm32mp21 SoCs family

STM32MP21 family is composed of 3 SoCs defined as following:

-STM32MP211: common part composed of 1*Cortex-A35, common peripherals
like SDMMC, UART, SPI, I2C, parallel display, 1*ETH ...

-STM32MP213: STM32MP211 + a second ETH, CAN-FD.

-STM32MP215: STM32MP213 + Display and CSI2.

A second diversity layer exists for security features/ A35 frequency:
-STM32MP21xY, "Y" gives information:
 -Y = A means A35@1.2GHz + no cryp IP and no secure boot.
 -Y = C means A35@1.2GHz + cryp IP and secure boot.
 -Y = D means A35@1.5GHz + no cryp IP and no secure boot.
 -Y = F means A35@1.5GHz + cryp IP and secure boot.

Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>
Signed-off-by: Amelie Delaunay <amelie.delaunay@foss.st.com>
Link: https://lore.kernel.org/r/20250225-b4-stm32mp2_new_dts-v2-8-1a628c1580c7@foss.st.com
Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/arch/arm64/boot/dts/st/stm32mp21xf.dtsi b/arch/arm64/boot/dts/st/stm32mp21xf.dtsi
new file mode 100644
index 000000000000..e33b00b424e1
--- /dev/null
+++ b/arch/arm64/boot/dts/st/stm32mp21xf.dtsi
@@ -0,0 +1,8 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
+/*
+ * Copyright (C) STMicroelectronics 2025 - All Rights Reserved
+ * Author: Alexandre Torgue <alexandre.torgue@foss.st.com> for STMicroelectronics.
+ */
+
+/ {
+};