--- zzzz-none-000/linux-4.9.279/drivers/tty/serial/serial_core.c	2021-08-08 06:38:54.000000000 +0000
+++ puma7-arm-6591-750/linux-4.9.279/drivers/tty/serial/serial_core.c	2023-02-08 10:58:14.000000000 +0000
@@ -20,6 +20,10 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
+/*
+Includes Intel Corporation's changes/modifications dated: 2014, 2017.
+Changed/modified portions - Copyright (c) 2014-2017, Intel Corporation.
+*/
 #include <linux/module.h>
 #include <linux/tty.h>
 #include <linux/tty_flip.h>
@@ -1771,6 +1775,7 @@
 	char stat_buf[32];
 	unsigned int status;
 	int mmio;
+	int j;
 
 	mutex_lock(&port->mutex);
 	uport = uart_port_check(state);
@@ -1834,6 +1839,14 @@
 		seq_puts(m, stat_buf);
 	}
 	seq_putc(m, '\n');
+	seq_printf(m, "Rx histogram (num of bytes read from fifo): \n");
+	if (uport->irq == 8)
+	{
+		for (j = 0; j < 16; j++)
+		{
+			seq_printf(m, "%d bytes: %d\n", j+1, uport->histogram_RX_stats[j]);
+		}
+	}
 #undef STATBIT
 #undef INFOBIT
 out: