--- zzzz-none-000/linux-3.10.107/arch/arm64/kernel/time.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/arm64/kernel/time.c	2021-02-04 17:41:59.000000000 +0000
@@ -18,6 +18,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <linux/clockchips.h>
 #include <linux/export.h>
 #include <linux/kernel.h>
 #include <linux/interrupt.h>
@@ -33,13 +34,14 @@
 #include <linux/irq.h>
 #include <linux/delay.h>
 #include <linux/clocksource.h>
+#include <linux/clk-provider.h>
+#include <linux/acpi.h>
 
 #include <clocksource/arm_arch_timer.h>
 
 #include <asm/thread_info.h>
 #include <asm/stacktrace.h>
 
-#ifdef CONFIG_SMP
 unsigned long profile_pc(struct pt_regs *regs)
 {
 	struct stackframe frame;
@@ -59,28 +61,20 @@
 	return frame.pc;
 }
 EXPORT_SYMBOL(profile_pc);
-#endif
-
-static u64 sched_clock_mult __read_mostly;
-
-unsigned long long notrace sched_clock(void)
-{
-	return arch_timer_read_counter() * sched_clock_mult;
-}
 
 void __init time_init(void)
 {
 	u32 arch_timer_rate;
 
-	clocksource_of_init();
+	of_clk_init(NULL);
+	clocksource_probe();
+
+	tick_setup_hrtimer_broadcast();
 
 	arch_timer_rate = arch_timer_get_rate();
 	if (!arch_timer_rate)
 		panic("Unable to initialise architected timer.\n");
 
-	/* Cache the sched_clock multiplier to save a divide in the hot path. */
-	sched_clock_mult = NSEC_PER_SEC / arch_timer_rate;
-
 	/* Calibrate the delay loop directly */
 	lpj_fine = arch_timer_rate / HZ;
 }