--- zzzz-none-000/linux-3.10.107/arch/mips/kernel/csrc-bcm1480.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/mips/kernel/csrc-bcm1480.c	2021-02-04 17:41:59.000000000 +0000
@@ -10,12 +10,9 @@
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  */
 #include <linux/clocksource.h>
+#include <linux/sched_clock.h>
 
 #include <asm/addrspace.h>
 #include <asm/io.h>
@@ -41,6 +38,11 @@
 	.flags	= CLOCK_SOURCE_IS_CONTINUOUS,
 };
 
+static u64 notrace sb1480_read_sched_clock(void)
+{
+	return __raw_readq(IOADDR(A_SCD_ZBBUS_CYCLE_COUNT));
+}
+
 void __init sb1480_clocksource_init(void)
 {
 	struct clocksource *cs = &bcm1480_clocksource;
@@ -50,4 +52,6 @@
 	plldiv = G_BCM1480_SYS_PLL_DIV(__raw_readq(IOADDR(A_SCD_SYSTEM_CFG)));
 	zbbus = ((plldiv >> 1) * 50000000) + ((plldiv & 1) * 25000000);
 	clocksource_register_hz(cs, zbbus);
+
+	sched_clock_register(sb1480_read_sched_clock, 64, zbbus);
 }