--- zzzz-none-000/linux-3.10.107/arch/arm/mach-s3c64xx/s3c6400.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/arm/mach-s3c64xx/s3c6400.c	2021-02-04 17:41:59.000000000 +0000
@@ -9,6 +9,10 @@
  * published by the Free Software Foundation.
 */
 
+/*
+ * NOTE: Code in this file is not used when booting with Device Tree support.
+ */
+
 #include <linux/kernel.h>
 #include <linux/types.h>
 #include <linux/interrupt.h>
@@ -19,7 +23,9 @@
 #include <linux/io.h>
 #include <linux/device.h>
 #include <linux/serial_core.h>
+#include <linux/serial_s3c.h>
 #include <linux/platform_device.h>
+#include <linux/of.h>
 
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
@@ -29,17 +35,15 @@
 #include <asm/irq.h>
 
 #include <plat/cpu-freq.h>
-#include <plat/regs-serial.h>
 #include <mach/regs-clock.h>
 
 #include <plat/cpu.h>
 #include <plat/devs.h>
-#include <plat/clock.h>
 #include <plat/sdhci.h>
 #include <plat/iic-core.h>
-#include <plat/onenand-core.h>
 
 #include "common.h"
+#include "onenand-core.h"
 
 void __init s3c6400_map_io(void)
 {
@@ -58,12 +62,6 @@
 	s3c64xx_onenand1_setname("s3c6400-onenand");
 }
 
-void __init s3c6400_init_clocks(int xtal)
-{
-	s3c64xx_register_clocks(xtal, S3C6400_CLKDIV0_ARM_MASK);
-	s3c64xx_setup_clocks();
-}
-
 void __init s3c6400_init_irq(void)
 {
 	/* VIC0 does not have IRQS 5..7,
@@ -82,6 +80,10 @@
 
 static int __init s3c6400_core_init(void)
 {
+	/* Not applicable when using DT. */
+	if (of_have_populated_dt())
+		return 0;
+
 	return subsys_system_register(&s3c6400_subsys, NULL);
 }