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

   1
   2 # SPDX-License-Identifier: GPL-2.0
   3 is_consistent()
   4 {
   5         val=
   6
   7         active_low_sysfs=`cat $GPIO_SYSFS/gpio$nr/active_low`
   8         val_sysfs=`cat $GPIO_SYSFS/gpio$nr/value`
   9         dir_sysfs=`cat $GPIO_SYSFS/gpio$nr/direction`
  10
  11         gpio_this_debugfs=`cat $GPIO_DEBUGFS |grep "gpio-$nr" | sed "s/(.*)//g"`
  12         dir_debugfs=`echo $gpio_this_debugfs | awk '{print $2}'`
  13         val_debugfs=`echo $gpio_this_debugfs | awk '{print $3}'`
  14         if [ $val_debugfs = "lo" ]; then
  15                 val=0
  16         elif [ $val_debugfs = "hi" ]; then
  17                 val=1
  18         fi
  19
  20         if [ $active_low_sysfs = "1" ]; then
  21                 if [ $val = "0" ]; then
  22                         val="1"
  23                 else
  24                         val="0"
  25                 fi
  26         fi
  27
  28         if [ $val_sysfs = $val ] && [ $dir_sysfs = $dir_debugfs ]; then
  29                 echo -n "."
  30         else
  31                 echo "test fail, exit"
  32                 die
  33         fi
  34 }
  35
  36 test_pin_logic()
  37 {
  38         nr=$1
  39         direction=$2
  40         active_low=$3
  41         value=$4
  42
  43         echo $direction > $GPIO_SYSFS/gpio$nr/direction
  44         echo $active_low > $GPIO_SYSFS/gpio$nr/active_low
  45         if [ $direction = "out" ]; then
  46                 echo $value > $GPIO_SYSFS/gpio$nr/value
  47         fi
  48         is_consistent $nr
  49 }
  50
  51 test_one_pin()
  52 {
  53         nr=$1
  54
  55         echo -n "test pin<$nr>"
  56
  57         echo $nr > $GPIO_SYSFS/export 2>/dev/null
  58
  59         if [ X$? != X0 ]; then
  60                 echo "test GPIO pin $nr failed"
  61                 die
  62         fi
  63
  64         #"Checking if the sysfs is consistent with debugfs: "
  65         is_consistent $nr
  66
  67         #"Checking the logic of active_low: "
  68         test_pin_logic $nr out 1 1
  69         test_pin_logic $nr out 1 0
  70         test_pin_logic $nr out 0 1
  71         test_pin_logic $nr out 0 0
  72
  73         #"Checking the logic of direction: "
  74         test_pin_logic $nr in 1 1
  75         test_pin_logic $nr out 1 0
  76         test_pin_logic $nr low 0 1
  77         test_pin_logic $nr high 0 0
  78
  79         echo $nr > $GPIO_SYSFS/unexport
  80
  81         echo "successful"
  82 }
  83
  84 test_one_pin_fail()
  85 {
  86         nr=$1
  87
  88         echo $nr > $GPIO_SYSFS/export 2>/dev/null
  89
  90         if [ X$? != X0 ]; then
  91                 echo "test invalid pin $nr successful"
  92         else
  93                 echo "test invalid pin $nr failed"
  94                 echo $nr > $GPIO_SYSFS/unexport 2>/dev/null
  95                 die
  96         fi
  97 }
  98
  99 list_chip()
 100 {
 101         echo `ls -d $GPIO_DRV_SYSFS/gpiochip* 2>/dev/null`
 102 }
 103
 104 test_chip()
 105 {
 106         chip=$1
 107         name=`basename $chip`
 108         base=`cat $chip/base`
 109         ngpio=`cat $chip/ngpio`
 110         printf "%-10s %-5s %-5s\n" $name $base $ngpio
 111         if [ $ngpio = "0" ]; then
 112                 echo "number of gpio is zero is not allowed".
 113         fi
 114         test_one_pin $base
 115         test_one_pin $(($base + $ngpio - 1))
 116         test_one_pin $((( RANDOM % $ngpio )  + $base ))
 117 }
 118
 119 test_chips_sysfs()
 120 {
 121        gpiochip=`list_chip $module`
 122        if [ X"$gpiochip" = X ]; then
 123                if [ X"$valid" = Xfalse ]; then
 124                        echo "successful"
 125                else
 126                        echo "fail"
 127                        die
 128                fi
 129        else
 130                for chip in $gpiochip; do
 131                        test_chip $chip
 132                done
 133        fi
 134 }
 135