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

1 files changed, 106 insertions, 0 deletions

diff --git a/arch/arm/mach-socfpga/spl_agilex7m.c b/arch/arm/mach-socfpga/spl_agilex7m.c
new file mode 100644
index 00000000000..90065ccee6f
--- /dev/null
+++ b/arch/arm/mach-socfpga/spl_agilex7m.c
@@ -0,0 +1,106 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2025 Altera Corporation <www.altera.com>
+ */
+
+#include <hang.h>
+#include <image.h>
+#include <init.h>
+#include <log.h>
+#include <spl.h>
+#include <wdt.h>
+#include <asm/arch/clock_manager.h>
+#include <asm/arch/firewall.h>
+#include <asm/arch/mailbox_s10.h>
+#include <asm/arch/misc.h>
+#include <asm/arch/reset_manager.h>
+#include <asm/arch/system_manager.h>
+#include <asm/global_data.h>
+#include <asm/io.h>
+#include <asm/u-boot.h>
+#include <asm/utils.h>
+#include <dm/uclass.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+void board_init_f(ulong dummy)
+{
+	int ret;
+	struct udevice *dev;
+
+	/* Enable Async */
+	asm volatile("msr daifclr, #4");
+
+#ifdef CONFIG_XPL_BUILD
+	spl_save_restore_data();
+#endif
+
+	ret = spl_early_init();
+	if (ret)
+		hang();
+
+	socfpga_get_sys_mgr_addr();
+	socfpga_get_managers_addr();
+
+	/* Ensure watchdog is paused when debugging is happening */
+	writel(SYSMGR_WDDBG_PAUSE_ALL_CPU,
+	       socfpga_get_sysmgr_addr() + SYSMGR_SOC64_WDDBG);
+
+	/* ensure all processors are not released prior Linux boot */
+	writeq(0, CPU_RELEASE_ADDR);
+
+	timer_init();
+
+	mbox_init();
+
+	mbox_hps_stage_notify(HPS_EXECUTION_STATE_FSBL);
+
+	sysmgr_pinmux_init();
+
+	ret = uclass_get_device(UCLASS_CLK, 0, &dev);
+	if (ret) {
+		debug("Clock init failed: %d\n", ret);
+		hang();
+	}
+
+	/*
+	 * Enable watchdog as early as possible before initializing other
+	 * component. Watchdog need to be enabled after clock driver because
+	 * it will retrieve the clock frequency from clock driver.
+	 */
+	if (CONFIG_IS_ENABLED(WDT))
+		initr_watchdog();
+
+	preloader_console_init();
+	print_reset_info();
+	cm_print_clock_quick_summary();
+
+	ret = uclass_get_device_by_name(UCLASS_NOP, "socfpga-system-mgr-firewall", &dev);
+	if (ret) {
+		printf("System manager firewall configuration failed: %d\n", ret);
+		hang();
+	}
+
+	ret = uclass_get_device_by_name(UCLASS_NOP, "socfpga-l3interconnect-firewall", &dev);
+	if (ret) {
+		printf("L3 interconnect firewall configuration failed: %d\n", ret);
+		hang();
+	}
+
+	ret = uclass_get_device(UCLASS_CACHE, 0, &dev);
+	if (ret) {
+		debug("CCU init failed: %d\n", ret);
+		hang();
+	}
+
+	if (IS_ENABLED(CONFIG_SPL_ALTERA_SDRAM)) {
+		ret = uclass_get_device(UCLASS_RAM, 0, &dev);
+		if (ret) {
+			debug("DRAM init failed: %d\n", ret);
+			hang();
+		}
+	}
+
+	if (IS_ENABLED(CONFIG_CADENCE_QSPI))
+		mbox_qspi_open();
+}