--- zzzz-none-000/linux-4.9.279/drivers/tty/serial/8250/8250_core.c	2021-08-08 06:38:54.000000000 +0000
+++ puma7-atom-6591-750/linux-4.9.279/drivers/tty/serial/8250/8250_core.c	2023-02-08 11:43:42.000000000 +0000
@@ -17,6 +17,10 @@
  * the Free Software Foundation; either version 2 of the License, or
  * (at your option) any later version.
  */
+/*
+ * Includes Intel Corporation's changes/modifications dated: 2017, 2019.
+ * Changed/modified portions - Copyright (c) 2017-2019, Intel Corporation.
+ */
 
 #include <linux/module.h>
 #include <linux/moduleparam.h>
@@ -45,6 +49,8 @@
 
 #include "8250.h"
 
+#include <asm/intel-ce2700.h>
+
 /*
  * Configuration:
  *   share_irqs - whether we pass IRQF_SHARED to request_irq().  This option
@@ -1124,6 +1130,13 @@
 	ret = sunserial_register_minors(&serial8250_reg, UART_NR);
 #else
 	serial8250_reg.nr = UART_NR;
+
+#ifdef CONFIG_INTEL_UART_ENABLE_CONTROL
+	if (uart_sysfs_create_uart_enable_ctrl()) {
+		ret = -ENOMEM;
+		goto out;
+	}
+#endif
 	ret = uart_register_driver(&serial8250_reg);
 #endif
 	if (ret)
@@ -1162,6 +1175,9 @@
 	uart_unregister_driver(&serial8250_reg);
 #endif
 out:
+#ifndef CONFIG_INTEL_UART_ENABLE
+	intel_ce2700_config_atom_uartctrl(0);
+#endif
 	return ret;
 }