From 5df695fa14d866934c9f85c7c9921bf26b6e30ae Mon Sep 17 00:00:00 2001
From: Mykyta Dorokhin <mykyta.dorokhin@globallogic.com>
Date: Tue, 20 Sep 2016 20:37:56 +0300
Subject: mpt: Add preempt to the mLinux kernel for PPS signal

---
 recipes-kernel/linux/linux-3.12.27/mtp/defconfig | 29 ++++++++++++++++--------
 1 file changed, 19 insertions(+), 10 deletions(-)

diff --git a/recipes-kernel/linux/linux-3.12.27/mtp/defconfig b/recipes-kernel/linux/linux-3.12.27/mtp/defconfig
index b0818ff..3a8ef54 100644
--- a/recipes-kernel/linux/linux-3.12.27/mtp/defconfig
+++ b/recipes-kernel/linux/linux-3.12.27/mtp/defconfig
@@ -82,10 +82,16 @@ CONFIG_TICK_CPU_ACCOUNTING=y
 #
 # RCU Subsystem
 #
-CONFIG_TINY_RCU=y
-# CONFIG_PREEMPT_RCU is not set
-# CONFIG_RCU_STALL_COMMON is not set
+CONFIG_TREE_PREEMPT_RCU=y
+# CONFIG_TINY_RCU is not set
+CONFIG_PREEMPT_RCU=y
+CONFIG_RCU_STALL_COMMON=y
+CONFIG_RCU_FANOUT=32
+CONFIG_RCU_FANOUT_LEAF=16
+# CONFIG_RCU_FANOUT_EXACT is not set
 # CONFIG_TREE_RCU_TRACE is not set
+# CONFIG_RCU_BOOST is not set
+# CONFIG_RCU_NOCB_CPU is not set
 # CONFIG_IKCONFIG is not set
 CONFIG_LOG_BUF_SHIFT=14
 CONFIG_GENERIC_SCHED_CLOCK=y
@@ -217,11 +223,7 @@ CONFIG_IOSCHED_CFQ=y
 # CONFIG_DEFAULT_CFQ is not set
 CONFIG_DEFAULT_NOOP=y
 CONFIG_DEFAULT_IOSCHED="noop"
-CONFIG_INLINE_SPIN_UNLOCK_IRQ=y
-CONFIG_INLINE_READ_UNLOCK=y
-CONFIG_INLINE_READ_UNLOCK_IRQ=y
-CONFIG_INLINE_WRITE_UNLOCK=y
-CONFIG_INLINE_WRITE_UNLOCK_IRQ=y
+CONFIG_UNINLINE_SPIN_UNLOCK=y
 CONFIG_ARCH_SUPPORTS_ATOMIC_RMW=y
 CONFIG_FREEZER=y
 
@@ -369,9 +371,10 @@ CONFIG_VMSPLIT_3G=y
 # CONFIG_VMSPLIT_1G is not set
 CONFIG_PAGE_OFFSET=0xC0000000
 CONFIG_ARCH_NR_GPIO=0
-CONFIG_PREEMPT_NONE=y
+# CONFIG_PREEMPT_NONE is not set
 # CONFIG_PREEMPT_VOLUNTARY is not set
-# CONFIG_PREEMPT is not set
+CONFIG_PREEMPT=y
+CONFIG_PREEMPT_COUNT=y
 CONFIG_HZ_FIXED=100
 CONFIG_HZ=100
 CONFIG_SCHED_HRTICK=y
@@ -2618,6 +2621,7 @@ CONFIG_PANIC_ON_OOPS_VALUE=0
 CONFIG_SCHED_DEBUG=y
 # CONFIG_SCHEDSTATS is not set
 # CONFIG_TIMER_STATS is not set
+CONFIG_DEBUG_PREEMPT=y
 
 #
 # Lock Debugging (spinlocks, mutexes, etc...)
@@ -2643,8 +2647,12 @@ CONFIG_DEBUG_BUGVERBOSE=y
 #
 # RCU Debugging
 #
+# CONFIG_PROVE_RCU_DELAY is not set
 # CONFIG_SPARSE_RCU_POINTER is not set
 # CONFIG_RCU_TORTURE_TEST is not set
+CONFIG_RCU_CPU_STALL_TIMEOUT=21
+CONFIG_RCU_CPU_STALL_VERBOSE=y
+# CONFIG_RCU_CPU_STALL_INFO is not set
 # CONFIG_RCU_TRACE is not set
 # CONFIG_DEBUG_BLOCK_EXT_DEVT is not set
 # CONFIG_NOTIFIER_ERROR_INJECTION is not set
@@ -2660,6 +2668,7 @@ CONFIG_TRACING_SUPPORT=y
 CONFIG_FTRACE=y
 # CONFIG_FUNCTION_TRACER is not set
 # CONFIG_IRQSOFF_TRACER is not set
+# CONFIG_PREEMPT_TRACER is not set
 # CONFIG_SCHED_TRACER is not set
 # CONFIG_ENABLE_DEFAULT_TRACERS is not set
 # CONFIG_FTRACE_SYSCALLS is not set
-- 
cgit v1.2.3


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)
-- 
cgit v1.2.3