tools/testing/selftests/gpio/gpio-mockup-sysfs.sh

   1
   2 is_consistent()
   3 {
   4         val=
   5
   6         active_low_sysfs=`cat $GPIO_SYSFS/gpio$nr/active_low`
   7         val_sysfs=`cat $GPIO_SYSFS/gpio$nr/value`
   8         dir_sysfs=`cat $GPIO_SYSFS/gpio$nr/direction`
   9
  10         gpio_this_debugfs=`cat $GPIO_DEBUGFS |grep "gpio-$nr" | sed "s/(.*)//g"`
  11         dir_debugfs=`echo $gpio_this_debugfs | awk '{print $2}'`
  12         val_debugfs=`echo $gpio_this_debugfs | awk '{print $3}'`
  13         if [ $val_debugfs = "lo" ]; then
  14                 val=0
  15         elif [ $val_debugfs = "hi" ]; then
  16                 val=1
  17         fi
  18
  19         if [ $active_low_sysfs = "1" ]; then
  20                 if [ $val = "0" ]; then
  21                         val="1"
  22                 else
  23                         val="0"
  24                 fi
  25         fi
  26
  27         if [ $val_sysfs = $val ] && [ $dir_sysfs = $dir_debugfs ]; then
  28                 echo -n "."
  29         else
  30                 echo "test fail, exit"
  31                 die
  32         fi
  33 }
  34
  35 test_pin_logic()
  36 {
  37         nr=$1
  38         direction=$2
  39         active_low=$3
  40         value=$4
  41
  42         echo $direction > $GPIO_SYSFS/gpio$nr/direction
  43         echo $active_low > $GPIO_SYSFS/gpio$nr/active_low
  44         if [ $direction = "out" ]; then
  45                 echo $value > $GPIO_SYSFS/gpio$nr/value
  46         fi
  47         is_consistent $nr
  48 }
  49
  50 test_one_pin()
  51 {
  52         nr=$1
  53
  54         echo -n "test pin<$nr>"
  55
  56         echo $nr > $GPIO_SYSFS/export 2>/dev/null
  57
  58         if [ X$? != X0 ]; then
  59                 echo "test GPIO pin $nr failed"
  60                 die
  61         fi
  62
  63         #"Checking if the sysfs is consistent with debugfs: "
  64         is_consistent $nr
  65
  66         #"Checking the logic of active_low: "
  67         test_pin_logic $nr out 1 1
  68         test_pin_logic $nr out 1 0
  69         test_pin_logic $nr out 0 1
  70         test_pin_logic $nr out 0 0
  71
  72         #"Checking the logic of direction: "
  73         test_pin_logic $nr in 1 1
  74         test_pin_logic $nr out 1 0
  75         test_pin_logic $nr low 0 1
  76         test_pin_logic $nr high 0 0
  77
  78         echo $nr > $GPIO_SYSFS/unexport
  79
  80         echo "successful"
  81 }
  82
  83 test_one_pin_fail()
  84 {
  85         nr=$1
  86
  87         echo $nr > $GPIO_SYSFS/export 2>/dev/null
  88
  89         if [ X$? != X0 ]; then
  90                 echo "test invalid pin $nr successful"
  91         else
  92                 echo "test invalid pin $nr failed"
  93                 echo $nr > $GPIO_SYSFS/unexport 2>/dev/null
  94                 die
  95         fi
  96 }
  97
  98 list_chip()
  99 {
 100         echo `ls -d $GPIO_DRV_SYSFS/gpiochip* 2>/dev/null`
 101 }
 102
 103 test_chip()
 104 {
 105         chip=$1
 106         name=`basename $chip`
 107         base=`cat $chip/base`
 108         ngpio=`cat $chip/ngpio`
 109         printf "%-10s %-5s %-5s\n" $name $base $ngpio
 110         if [ $ngpio = "0" ]; then
 111                 echo "number of gpio is zero is not allowed".
 112         fi
 113         test_one_pin $base
 114         test_one_pin $(($base + $ngpio - 1))
 115         test_one_pin $((( RANDOM % $ngpio )  + $base ))
 116 }
 117
 118 test_chips_sysfs()
 119 {
 120        gpiochip=`list_chip $module`
 121        if [ X"$gpiochip" = X ]; then
 122                if [ X"$valid" = Xfalse ]; then
 123                        echo "successful"
 124                else
 125                        echo "fail"
 126                        die
 127                fi
 128        else
 129                for chip in $gpiochip; do
 130                        test_chip $chip
 131                done
 132        fi
 133 }
 134