1 // SPDX-License-Identifier: GPL-2.0-only
12  * generic_buffer -n <device_name> -t <trigger_name>
36  * enum autochan - state for the automatic channel enabling mechanism
45  * size_from_channelarray() - calculate the storage size of a scan
61 			channels[i].location = bytes - bytes % channels[i].bytes  in size_from_channelarray()
77 	input >>= info->shift;  in print1byte()
78 	input &= info->mask;  in print1byte()
79 	if (info->is_signed) {  in print1byte()
80 		int8_t val = (int8_t)(input << (8 - info->bits_used)) >>  in print1byte()
81 			     (8 - info->bits_used);  in print1byte()
82 		printf("%05f ", ((float)val + info->offset) * info->scale);  in print1byte()
84 		printf("%05f ", ((float)input + info->offset) * info->scale);  in print1byte()
91 	if (info->be)  in print2byte()
100 	input >>= info->shift;  in print2byte()
101 	input &= info->mask;  in print2byte()
102 	if (info->is_signed) {  in print2byte()
103 		int16_t val = (int16_t)(input << (16 - info->bits_used)) >>  in print2byte()
104 			      (16 - info->bits_used);  in print2byte()
105 		printf("%05f ", ((float)val + info->offset) * info->scale);  in print2byte()
107 		printf("%05f ", ((float)input + info->offset) * info->scale);  in print2byte()
114 	if (info->be)  in print4byte()
123 	input >>= info->shift;  in print4byte()
124 	input &= info->mask;  in print4byte()
125 	if (info->is_signed) {  in print4byte()
126 		int32_t val = (int32_t)(input << (32 - info->bits_used)) >>  in print4byte()
127 			      (32 - info->bits_used);  in print4byte()
128 		printf("%05f ", ((float)val + info->offset) * info->scale);  in print4byte()
130 		printf("%05f ", ((float)input + info->offset) * info->scale);  in print4byte()
137 	if (info->be)  in print8byte()
146 	input >>= info->shift;  in print8byte()
147 	input &= info->mask;  in print8byte()
148 	if (info->is_signed) {  in print8byte()
149 		int64_t val = (int64_t)(input << (64 - info->bits_used)) >>  in print8byte()
150 			      (64 - info->bits_used);  in print8byte()
152 		if (info->scale == 1.0f && info->offset == 0.0f)  in print8byte()
156 			       ((float)val + info->offset) * info->scale);  in print8byte()
158 		printf("%05f ", ((float)input + info->offset) * info->scale);  in print8byte()
163  * process_scan() - print out the values in SI units
210 	scanelemdir[sizeof(scanelemdir)-1] = '\0';  in enable_disable_all_channels()
216 		return -EIO;  in enable_disable_all_channels()
219 	ret = -ENOENT;  in enable_disable_all_channels()
221 		if (iioutils_check_suffix(ent->d_name, "_en")) {  in enable_disable_all_channels()
224 			       ent->d_name);  in enable_disable_all_channels()
225 			ret = write_sysfs_int(ent->d_name, scanelemdir,  in enable_disable_all_channels()
229 					ent->d_name);  in enable_disable_all_channels()
233 	if (closedir(dp) == -1) {  in enable_disable_all_channels()
236 		return -errno;  in enable_disable_all_channels()
245 		"  -a         Auto-activate all available channels\n"  in print_usage()
246 		"  -A         Force-activate ALL channels\n"  in print_usage()
247 		"  -c <n>     Do n conversions, or loop forever if n < 0\n"  in print_usage()
248 		"  -e         Disable wait for event (new data)\n"  in print_usage()
249 		"  -g         Use trigger-less mode\n"  in print_usage()
250 		"  -l <n>     Set buffer length to n samples\n"  in print_usage()
251 		"  --device-name -n <name>\n"  in print_usage()
252 		"  --device-num -N <num>\n"  in print_usage()
254 		"  --trigger-name -t <name>\n"  in print_usage()
255 		"  --trigger-num -T <num>\n"  in print_usage()
257 		"  -w <n>     Set delay between reads in us (event-less mode)\n");  in print_usage()
271 		/* Disconnect the trigger - just write a dummy name. */  in cleanup()
276 				strerror(-ret));  in cleanup()
285 				strerror(-ret));  in cleanup()
288 	/* Disable channels if auto-enabled */  in cleanup()
301 	exit(-signum);  in sig_handler()
314 			exit(-1);  in register_cleanup()
320 	{ "device-name",	1, 0, 'n' },
321 	{ "device-num",		1, 0, 'N' },
322 	{ "trigger-name",	1, 0, 't' },
323 	{ "trigger-num",	1, 0, 'T' },
337 	int fp = -1;  in main()
344 	int dev_num = -1, trig_num = -1;  in main()
356 	while ((c = getopt_long(argc, argv, "aAc:egl:n:N:t:T:w:?", longopts,  in main()
357 				NULL)) != -1) {  in main()
370 				ret = -errno;  in main()
385 				ret = -errno;  in main()
397 				ret = -errno;  in main()
408 				return -errno;  in main()
414 				ret = -errno;  in main()
420 			ret = -1;  in main()
429 		ret = -1;  in main()
432 		fprintf(stderr, "Only one of --device-num or --device-name needs to be set\n");  in main()
434 		ret = -1;  in main()
448 		return -ENOMEM;  in main()
453 			ret = -ENOMEM;  in main()
464 		printf("trigger-less mode selected\n");  in main()
469 			return -ENOMEM;  in main()
487 				       "%s-dev%d", device_name, dev_num);  in main()
489 				ret = -ENOMEM;  in main()
494 		/* Look for this "-devN" trigger */  in main()
497 			/* OK try the simpler "-trigger" suffix instead */  in main()
500 				       "%s-trigger", device_name);  in main()
502 				ret = -ENOMEM;  in main()
530 		fprintf(stderr, "Auto-channels selected but some channels "  in main()
558 				"auto-enabling, giving up\n");  in main()
568 			"/*_en or pass -a to autoenable channels and "  in main()
570 		ret = -ENOENT;  in main()
582 		ret = -ENOMEM;  in main()
611 			"Failed to enable buffer: %s\n", strerror(-ret));  in main()
618 		ret = -ENOMEM;  in main()
624 		ret = -ENOMEM;  in main()
630 	if (fp == -1) { /* TODO: If it isn't there make the node */  in main()
631 		ret = -errno;  in main()
643 			ret = poll(&pfd, 1, -1);  in main()
645 				ret = -errno;  in main()
674 	if (fp >= 0 && close(fp) == -1)  in main()
679 	for (i = num_channels - 1; i >= 0; i--) {  in main()