--- zzzz-none-000/linux-3.10.107/arch/mips/jz4740/setup.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/mips/jz4740/setup.c	2021-02-04 17:41:59.000000000 +0000
@@ -16,9 +16,14 @@
 
 #include <linux/init.h>
 #include <linux/io.h>
+#include <linux/irqchip.h>
 #include <linux/kernel.h>
+#include <linux/libfdt.h>
+#include <linux/of_fdt.h>
+#include <linux/of_platform.h>
 
 #include <asm/bootinfo.h>
+#include <asm/prom.h>
 
 #include <asm/mach-jz4740/base.h>
 
@@ -32,7 +37,7 @@
 {
 	void __iomem *jz_emc_base;
 	u32 ctrl, bus, bank, rows, cols;
-	phys_t size;
+	phys_addr_t size;
 
 	jz_emc_base = ioremap(JZ4740_EMC_BASE_ADDR, 0x100);
 	ctrl = readl(jz_emc_base + JZ4740_EMC_SDRAM_CTRL);
@@ -51,11 +56,40 @@
 
 void __init plat_mem_setup(void)
 {
+	int offset;
+
 	jz4740_reset_init();
-	jz4740_detect_mem();
+	__dt_setup_arch(__dtb_start);
+
+	offset = fdt_path_offset(__dtb_start, "/memory");
+	if (offset < 0)
+		jz4740_detect_mem();
 }
 
+void __init device_tree_init(void)
+{
+	if (!initial_boot_params)
+		return;
+
+	unflatten_and_copy_device_tree();
+}
+
+static int __init populate_machine(void)
+{
+	of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
+	return 0;
+}
+arch_initcall(populate_machine);
+
 const char *get_system_type(void)
 {
+	if (config_enabled(CONFIG_MACH_JZ4780))
+		return "JZ4780";
+
 	return "JZ4740";
 }
+
+void __init arch_init_irq(void)
+{
+	irqchip_init();
+}