Merge tag 'u-boot-socfpga-next-20250808' of https://source.denx.de/u-boot/custodians/u-boot-socfpgaHEADmaster

This pull request introduces initial U-Boot support for Agilex7 M-series, along
with several enhancements and cleanups across existing Agilex platforms. Key
changes include new board support, DDR driver additions, updated device trees,
and broader SoCFPGA SPL improvements.

Highlights:

- Agilex7 M-series bring-up:
  - Basic DT support and board initialization for Agilex7 M-series SoC and
    SoCDK.
  - New sdram_agilex7m DDR driver with UIBSSM mailbox support and HBM support.
  - Clock driver support for Agilex7 M-series.
  - New defconfig: socfpga_agilex7m_defconfig.
- Agilex and Agilex5 enhancements:
  - Improved SPL support: ASYNC interrupt enabling, system manager init
    refactor, and cold scratch register usage.
  - Updated firewall probing and watchdog support in SPL.
  - Cleaned up DDR code, added secure region support for ATF, and improved warm
    reset handling.
- Device Tree and config updates:
  - Migration to upstream Linux DT layout for Agilex platforms.
  - Consolidated socfpga_agilex_defconfig and removed deprecated configs.
  - Platform-specific environment variables for Distro Boot added.
- Driver fixes and cleanups:
  - dwc_eth_xgmac and clk-agilex cleanup and improvements.
  - Several coverity and style fixes.

Contributions in this PR are from Alif Zakuan Yuslaimi, Tingting Meng, and
Andrew Goodbody.  This patch set has been tested on Agilex 5 devkit, Agilex
devkit and Agilex7m devkit.

Passing all pipeline tests at SoCFPGA U-boot custodian
https://source.denx.de/u-boot/custodians/u-boot-socfpga/-/pipelines/27318

3 files changed, 29 insertions, 0 deletions

diff --git a/board/intel/agilex7m-socdk/MAINTAINERS b/board/intel/agilex7m-socdk/MAINTAINERS
new file mode 100644
index 00000000000..9a5b80ae4df
--- /dev/null
+++ b/board/intel/agilex7m-socdk/MAINTAINERS
@@ -0,0 +1,10 @@
+SOCFPGA BOARD
+M:	Tien Fong Chee <tien.fong.chee@altera.com>
+M:	Alif Zakuan Yuslaimi <alif.zakuan.yuslaimi@altera.com>
+S:	Maintained
+F:	arch/arm/dts/socfpga_soc64_u-boot.dtsi
+F:	arch/arm/dts/socfpga_agilex7m*
+F:	arch/arm/mach-socfpga/spl_agilex7m.c
+F:	board/intel/agilex7m-socdk/
+F:	include/configs/socfpga_agilex7m_socdk.h
+F:	configs/socfpga_agilex7m_sdmmc_defconfig
diff --git a/board/intel/agilex7m-socdk/Makefile b/board/intel/agilex7m-socdk/Makefile
new file mode 100644
index 00000000000..306a8cf5f0b
--- /dev/null
+++ b/board/intel/agilex7m-socdk/Makefile
@@ -0,0 +1,7 @@
+#
+# Copyright (C) 2025 Altera Corporation <www.altera.com>
+#
+# SPDX-License-Identifier:	GPL-2.0
+#
+
+obj-y	:= socfpga.o
diff --git a/board/intel/agilex7m-socdk/socfpga.c b/board/intel/agilex7m-socdk/socfpga.c
new file mode 100644
index 00000000000..60c8704b391
--- /dev/null
+++ b/board/intel/agilex7m-socdk/socfpga.c
@@ -0,0 +1,12 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2025 Altera Corporation <www.altera.com>
+ */
+
+#include <asm/arch/misc.h>
+
+int board_early_init_f(void)
+{
+	socfpga_get_sys_mgr_addr();
+	return 0;
+}