From b6f0b9ae2aab863590cc236f599c802cfcee3a1a Mon Sep 17 00:00:00 2001
From: David Cermak <cermak@espressif.com>
Date: Tue, 30 Mar 2021 16:38:22 +0200
Subject: [PATCH] esp_modem: Add option which enables UART_ISR_IN_IRAM to
 support OTA

Closes https://github.com/espressif/esp-idf/issues/4582
---
 examples/protocols/pppos_client/main/Kconfig.projbuild | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/examples/protocols/pppos_client/main/Kconfig.projbuild b/examples/protocols/pppos_client/main/Kconfig.projbuild
index aa8848b7fe..a7f45c7bd0 100644
--- a/examples/protocols/pppos_client/main/Kconfig.projbuild
+++ b/examples/protocols/pppos_client/main/Kconfig.projbuild
@@ -54,6 +54,15 @@ menu "Example Configuration"
                 Enter the peer phone number that you want to send message to.
     endif
 
+    config EXAMPLE_UART_ISR_IN_RAM
+        bool "Use UART ISR in RAM"
+        default n
+        select UART_ISR_IN_IRAM
+        help
+            Enable placing UART ISR to IRAM.
+            This options is useful if PPPoS client needs to perform
+            flash operations (e.g. OTA) while keeping the network operational.
+
     config EXAMPLE_LCP_ECHO
         bool "Enable LCP ECHO"
         default n