meta-bletchley: motor-ctrl: Change sled numbering to 1-based

switch sled to 1-based numbering to align with multi host systems
tools only accept input sled1 to sled6

Change-Id: Ic372e011716d8de7edf2eebdf8667e44b2179e64
Signed-off-by: Allen.Wang <Allen_Wang@quantatw.com>
diff --git a/meta-facebook/meta-bletchley/recipes-bletchley/motor-ctrl/files/power-ctrl b/meta-facebook/meta-bletchley/recipes-bletchley/motor-ctrl/files/power-ctrl
index eebe50c..83d65df 100755
--- a/meta-facebook/meta-bletchley/recipes-bletchley/motor-ctrl/files/power-ctrl
+++ b/meta-facebook/meta-bletchley/recipes-bletchley/motor-ctrl/files/power-ctrl
@@ -62,9 +62,9 @@
 function get_bus_num() {
     SLED_NUM=$1
     local bus=0
-
-    if [[ "$SLED_NUM" = [0-5] ]]; then
-        bus="$SLED_NUM"
+    #Mapping Sled number 1~6 to i2c bus number 0~5
+    if [[ "$SLED_NUM" = [1-6] ]]; then
+        bus=$(( SLED_NUM - 1 ))
     fi
     echo "$bus"
 }
@@ -120,7 +120,7 @@
 }
 
 function show_usage(){
-    echo "Usage: power-ctrl [sled0 | sled1 | sled2 | sled3 | sled4 | sled5]  [on off ac-on ac-off status]"
+    echo "Usage: power-ctrl [sled1 | sled2 | sled3 | sled4 | sled5 | sled6]  [on off ac-on ac-off status]"
     echo "       power-ctrl chassis-cycle"
 }
 
@@ -142,7 +142,7 @@
   exit  1;
 fi
 
-if [[ "$1" =~ ^(slot[0-5]{1})$ ]] || [[ "$1" =~ ^(sled[0-5]{1})$ ]]; then
+if [[ "$1" =~ ^(sled[1-6]{1})$ ]]; then
   SLED=$1
   ACTION=$2
   SLED_NUM=${SLED:4}