Merge tag 'u-boot-socfpga-next-20250225' of https://source.denx.de/u-boot/custodians/u-boot-socfpga into next

CI: https://source.denx.de/u-boot/custodians/u-boot-socfpga/-/pipelines/24816

Please pull the SoCFPGA changes for next from u-boot-socfpga, containing
boot support for the  Altera SoCFPGA Agilex 5 platform in U-Boot. The
changes include:

1. Board-specific configurations and setup required to enable Agilex 5
   operation in U-Boot.
2. Integration of cache coherency unit (CCU) initialization routine,
   including CCU conguration in DT.
3. Clock, firewall (configured in DT), SMMU, low level initialization
   specific to Agilex 5.
4. Integration of memory initialization routine, including DDR setup.

This patch set has been tested on Agilex 5 devkit with QSPI boot
(UBI/UBIFS) and RAM boot (TFTP & ARM DS debugger).

1 files changed, 113 insertions, 0 deletions

diff --git a/arch/arm/mach-socfpga/altera-sysmgr.c b/arch/arm/mach-socfpga/altera-sysmgr.c
new file mode 100644
index 00000000000..ca3f5ca7dd5
--- /dev/null
+++ b/arch/arm/mach-socfpga/altera-sysmgr.c
@@ -0,0 +1,113 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2025 Altera Corporation <www.altera.com>
+ */
+
+/*
+ * This driver supports the SOCFPGA System Manager Register block which
+ * aggregates different peripheral function into one area.
+ * On 64 bit ARM parts, the system manager only can be accessed during
+ * EL3 mode. At lower exception level a SMC call is required to perform
+ * the read and write operation.
+ */
+
+#define LOG_CATEGORY UCLASS_NOP
+
+#include <dm.h>
+#include <log.h>
+#include <misc.h>
+#include <asm/io.h>
+#include <asm/system.h>
+#include <asm/arch/altera-sysmgr.h>
+#include <asm/arch/smc_api.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/intel-smc.h>
+
+static int altr_sysmgr_read_generic(struct udevice *dev, u32 *addr, u32 *value)
+{
+	u64 args[1];
+	u64 ret_arg;
+	int ret = 0;
+
+	debug("%s: %s(dev=%p, addr=0x%lx):\n", __func__,
+	      dev->name, dev, (uintptr_t)addr);
+
+	if (current_el() == 3) {
+		ret_arg = readl((uintptr_t)addr);
+	} else {
+		if (!(IS_ENABLED(CONFIG_SPL_BUILD)) && IS_ENABLED(CONFIG_SPL_ATF)) {
+			args[0] = (u64)(uintptr_t)addr;
+			ret = invoke_smc(INTEL_SIP_SMC_REG_READ, args, 1, &ret_arg, 1);
+		} else {
+			pr_err("%s Failed to read system manager at lower privilege and without BL31\n",
+			       dev->name);
+			return -EPROTONOSUPPORT;
+		}
+	}
+
+	*value = (u32)ret_arg;
+	return ret;
+}
+
+static int altr_sysmgr_write_generic(struct udevice *dev, u32 *addr, u32 value)
+{
+	u64 args[2];
+	int ret = 0;
+
+	debug("%s: %s(dev=%p, addr=0x%lx, val=0x%x):\n", __func__,
+	      dev->name, dev, (uintptr_t)addr, value);
+
+	if (current_el() == 3) {
+		writel(value, (uintptr_t)addr);
+	} else {
+		if (!(IS_ENABLED(CONFIG_SPL_BUILD)) && IS_ENABLED(CONFIG_SPL_ATF)) {
+			args[0] = (u64)(uintptr_t)(addr);
+			args[1] = value;
+			ret = invoke_smc(INTEL_SIP_SMC_REG_WRITE, args, 2, NULL, 0);
+		} else {
+			pr_err("%s Failed to write to system manager at lower privilege and without BL31\n",
+			       dev->name);
+			return -EPROTONOSUPPORT;
+		}
+	}
+
+	return ret;
+}
+
+static int altr_sysmgr_probe(struct udevice *dev)
+{
+	fdt_addr_t addr;
+	struct altr_sysmgr_priv *altr_priv = dev_get_priv(dev);
+
+	debug("%s: %s(dev=%p):\n", __func__, dev->name, dev);
+	addr = dev_read_addr(dev);
+	if (addr == FDT_ADDR_T_NONE) {
+		pr_err("%s dev_read_addr() failed\n", dev->name);
+		return -ENODEV;
+	}
+
+	altr_priv->regs = (void __iomem *)addr;
+	return 0;
+}
+
+static const struct altr_sysmgr_ops sysmgr_ops = {
+	.read = altr_sysmgr_read_generic,
+	.write = altr_sysmgr_write_generic,
+};
+
+static const struct udevice_id altr_sysmgr_ids[] = {
+	{ .compatible = "altr,sys-mgr-s10" },
+	{ .compatible = "altr,sys-mgr" },
+	{ },
+};
+
+U_BOOT_DRIVER(altr_sysmgr) = {
+	.name	= "altr_sysmgr",
+	.id	= UCLASS_NOP,
+	.of_match = altr_sysmgr_ids,
+	.probe	= altr_sysmgr_probe,
+	.ops	= &sysmgr_ops,
+	.priv_auto = sizeof(struct altr_sysmgr_priv),
+	.flags = DM_FLAG_PRE_RELOC,
+};