Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 37 insertions, 0 deletions

diff --git a/arch/nios2/kernel/prom.c b/arch/nios2/kernel/prom.c
new file mode 100644
index 0000000000..8d98af5c72
--- /dev/null
+++ b/arch/nios2/kernel/prom.c
@@ -0,0 +1,37 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Device tree support
+ *
+ * Copyright (C) 2013, 2015 Altera Corporation
+ * Copyright (C) 2010 Thomas Chou <thomas@wytron.com.tw>
+ *
+ * Based on MIPS support for CONFIG_OF device tree support
+ *
+ * Copyright (C) 2010 Cisco Systems Inc. <dediao@cisco.com>
+ */
+
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/memblock.h>
+#include <linux/of.h>
+#include <linux/of_fdt.h>
+#include <linux/io.h>
+
+#include <asm/sections.h>
+
+void __init early_init_devtree(void *params)
+{
+	__be32 *dtb = (u32 *)__dtb_start;
+#if defined(CONFIG_NIOS2_DTB_AT_PHYS_ADDR)
+	if (be32_to_cpup((__be32 *)CONFIG_NIOS2_DTB_PHYS_ADDR) ==
+		 OF_DT_HEADER) {
+		params = (void *)CONFIG_NIOS2_DTB_PHYS_ADDR;
+		early_init_dt_scan(params);
+		return;
+	}
+#endif
+	if (be32_to_cpu((__be32) *dtb) == OF_DT_HEADER)
+		params = (void *)__dtb_start;
+
+	early_init_dt_scan(params);
+}