1 // SPDX-License-Identifier: GPL-2.0-only
3  * GPIO chardev test helper
20 #include <linux/gpio.h>
21 #include "../../../gpio/gpio-utils.h"
23 #define CONSUMER	"gpio-selftest"
58 		ret = asprintf(path, "%s/gpio", mnt_fs_get_target(fs));  in get_debugfs()
67 		return -1;  in get_debugfs()
75 	FILE *f;  in gpio_debugfs_get()  local
84 	f = fopen(debugfs, "r");  in gpio_debugfs_get()
85 	if (!f)  in gpio_debugfs_get()
86 		err(EXIT_FAILURE, "read from gpio debugfs failed");  in gpio_debugfs_get()
89 	 * gpio-2   (                    |gpio-selftest               ) in  lo  in gpio_debugfs_get()
91 	while (getline(&line, &len, f) != -1) {  in gpio_debugfs_get()
118 	fclose(f);  in gpio_debugfs_get()
122 		return -1;  in gpio_debugfs_get()
144 		*ret = -errno;  in list_gpiochip()
151 		if (check_prefix(ent->d_name, "gpiochip")) {  in list_gpiochip()
152 			*ret = asprintf(&chrdev_name, "/dev/%s", ent->d_name);  in list_gpiochip()
157 			if (fd == -1) {  in list_gpiochip()
158 				*ret = -errno;  in list_gpiochip()
164 			if (*ret == -1) {  in list_gpiochip()
169 			if (strcmp(current->label, gpiochip_name) == 0  in list_gpiochip()
170 			    || check_prefix(current->label, gpiochip_name)) {  in list_gpiochip()
206 	ret = gpiotools_request_linehandle(cinfo->name, lines, 1, flag, &data,  in gpio_pin_test()
215 		ret = -EINVAL;  in gpio_pin_test()
220 			errno = -EINVAL;  in gpio_pin_test()
221 			ret = -errno;  in gpio_pin_test()
228 			errno = -EINVAL;  in gpio_pin_test()
229 			ret = -errno;  in gpio_pin_test()
236 		err(EXIT_FAILURE, "gpio<%s> line<%d> test flag<0x%x> value<%d>",  in gpio_pin_test()
237 		    cinfo->name, line, flag, value);  in gpio_pin_test()
262  * ./gpio-mockup-chardev gpio_chip_name_prefix is_valid_gpio_chip
265  *			  gpio-mockup
295 			ret = -EINVAL;  in main()
299 		ret = -EINVAL;  in main()
305 		gpio_pin_tests(current, current->lines - 1);  in main()
306 		gpio_pin_tests(current, random() % current->lines);  in main()
314 		fprintf(stderr, "gpio<%s> test failed\n", prefix);  in main()