From bed8161202dc8d85f8113219d7044938c903168d Mon Sep 17 00:00:00 2001
From: "Alan C. Assis" <acassis@gmail.com>
Date: Fri, 6 Aug 2021 18:33:38 -0300
Subject: [PATCH] Documentation/FAQ: Why /dev/ttySx is not created

---
 Documentation/faq/index.rst | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/Documentation/faq/index.rst b/Documentation/faq/index.rst
index d111001ae7..cb4c7d3f48 100644
--- a/Documentation/faq/index.rst
+++ b/Documentation/faq/index.rst
@@ -82,6 +82,18 @@ You need to enable these options in the menuconfig:
             [*]   Support SIGINT
             (0x03)  Serial parse SIGINT characters
 
+Why isn't /dev/ttySx created when using USB Console even when UART is enabled?
+==============================================================================
+
+If you don't use serial console then /dev/ttyS0 will not be created,
+even if you enable the UART peripheral at "System Type".
+
+You can fix it enabling the Serial Upper-Half Driver:
+
+    Device Drivers --->
+        Serial Driver Support --->
+            [*]   Enable standard "upper-half" serial driver
+
 Network
 =======