1
  2# SPDX-License-Identifier: GPL-2.0
  3is_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
 36test_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
 51test_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
 84test_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
 99list_chip()
100{
101	echo `ls -d $GPIO_DRV_SYSFS/gpiochip* 2>/dev/null`
102}
103
104test_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
119test_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