From 9f6497b3edd39742fb85b3ad70c0f25251a18cf1 Mon Sep 17 00:00:00 2001
From: Mykyta Dorokhin <mykyta.dorokhin@globallogic.com>
Date: Wed, 21 Sep 2016 01:07:18 +0300
Subject: mtp: remove /dev/modem_at[0,1] before powering down the radio on
 mts-io loading

Graceful cell radio power down can take 15+ seconds (to unregister from the network).
While powering down the radio is still responsive to AT command.
---
 recipes-bsp/multitech/mts-io/mts-io.mtp.init | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/recipes-bsp/multitech/mts-io/mts-io.mtp.init b/recipes-bsp/multitech/mts-io/mts-io.mtp.init
index f8df7ff..d8f8564 100644
--- a/recipes-bsp/multitech/mts-io/mts-io.mtp.init
+++ b/recipes-bsp/multitech/mts-io/mts-io.mtp.init
@@ -1,8 +1,13 @@
 #!/bin/bash
 
-hardware_init() {
+lora_init() {
   # reset lora chip
   mts-io-sysfs store lora-reset 0
+}
+
+cell_init() {
+  # remove /dev/modem_at[0,1] symlinks
+  rm -f /dev/modem_at[0,1]
 
   # power down the cellular chip gracefully
   mts-io-sysfs store radio-power 0
@@ -15,7 +20,8 @@ case $1 in
   start)
     echo "Loading mts-io module"
     modprobe mts_io
-    hardware_init &
+    lora_init
+    cell_init &
     ;;
 
   stop)
-- 
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