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authorCrestez Dan Leonard <leonard.crestez@intel.com>2016-05-23 21:39:57 +0300
committerJonathan Cameron <jic23@kernel.org>2016-05-29 22:39:41 +0300
commitde397db8ab9e292ed3b5be42d0892a0ec717330d (patch)
tree7c6b47e59cb1f02534ab3f24011504c69882ab9a /tools
parent4f20d5927b8e900ff1c3ee590b700ca71cd3f3ca (diff)
downloadlinux-de397db8ab9e292ed3b5be42d0892a0ec717330d.tar.xz
iio: iio_generic_buffer: Add --device-num option
This makes it possible to distinguish between iio devices with the same name. Signed-off-by: Crestez Dan Leonard <leonard.crestez@intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'tools')
-rw-r--r--tools/iio/iio_generic_buffer.c69
1 files changed, 51 insertions, 18 deletions
diff --git a/tools/iio/iio_generic_buffer.c b/tools/iio/iio_generic_buffer.c
index 972f40008a49..3f16e9f08d20 100644
--- a/tools/iio/iio_generic_buffer.c
+++ b/tools/iio/iio_generic_buffer.c
@@ -251,7 +251,9 @@ void print_usage(void)
" -e Disable wait for event (new data)\n"
" -g Use trigger-less mode\n"
" -l <n> Set buffer length to n samples\n"
- " -n <name> Set device name (mandatory)\n"
+ " --device-name -n <name>\n"
+ " --device-num -N <num>\n"
+ " Set device by name or number (mandatory)\n"
" -t <name> Set trigger name\n"
" -w <n> Set delay between reads in us (event-less mode)\n");
}
@@ -315,6 +317,12 @@ void register_cleanup(void)
}
}
+static const struct option longopts[] = {
+ { "device-name", 1, 0, 'n' },
+ { "device-num", 1, 0, 'N' },
+ { },
+};
+
int main(int argc, char **argv)
{
unsigned long num_loops = 2;
@@ -329,7 +337,7 @@ int main(int argc, char **argv)
char *data = NULL;
ssize_t read_size;
- int dev_num, trig_num;
+ int dev_num = -1, trig_num;
char *buffer_access = NULL;
int scan_size;
int noevents = 0;
@@ -340,7 +348,7 @@ int main(int argc, char **argv)
register_cleanup();
- while ((c = getopt(argc, argv, "ac:egl:n:t:w:")) != -1) {
+ while ((c = getopt_long(argc, argv, "ac:egl:n:N:t:w:", longopts, NULL)) != -1) {
switch (c) {
case 'a':
autochannels = AUTOCHANNELS_ENABLED;
@@ -370,7 +378,15 @@ int main(int argc, char **argv)
break;
case 'n':
- device_name = optarg;
+ device_name = strdup(optarg);
+ break;
+ case 'N':
+ errno = 0;
+ dev_num = strtoul(optarg, &dummy, 10);
+ if (errno) {
+ ret = -errno;
+ goto error;
+ }
break;
case 't':
trigger_name = strdup(optarg);
@@ -390,26 +406,42 @@ int main(int argc, char **argv)
}
}
- if (!device_name) {
- fprintf(stderr, "Device name not set\n");
- print_usage();
- return -1;
- }
-
/* Find the device requested */
- dev_num = find_type_by_name(device_name, "iio:device");
- if (dev_num < 0) {
- fprintf(stderr, "Failed to find the %s\n", device_name);
- ret = dev_num;
+ if (dev_num < 0 && !device_name) {
+ fprintf(stderr, "Device not set\n");
+ print_usage();
+ ret = -1;
+ goto error;
+ } else if (dev_num >= 0 && device_name) {
+ fprintf(stderr, "Only one of --device-num or --device-name needs to be set\n");
+ print_usage();
+ ret = -1;
goto error;
+ } else if (dev_num < 0) {
+ dev_num = find_type_by_name(device_name, "iio:device");
+ if (dev_num < 0) {
+ fprintf(stderr, "Failed to find the %s\n", device_name);
+ ret = dev_num;
+ goto error;
+ }
}
-
printf("iio device number being used is %d\n", dev_num);
ret = asprintf(&dev_dir_name, "%siio:device%d", iio_dir, dev_num);
- if (ret < 0) {
- ret = -ENOMEM;
- goto error;
+ if (ret < 0)
+ return -ENOMEM;
+ /* Fetch device_name if specified by number */
+ if (!device_name) {
+ device_name = malloc(IIO_MAX_NAME_LENGTH);
+ if (!device_name) {
+ ret = -ENOMEM;
+ goto error;
+ }
+ ret = read_sysfs_string("name", dev_dir_name, device_name);
+ if (ret < 0) {
+ fprintf(stderr, "Failed to read name of device %d\n", dev_num);
+ goto error;
+ }
}
if (!notrigger) {
@@ -619,6 +651,7 @@ error:
}
free(channels);
free(trigger_name);
+ free(device_name);
free(dev_dir_name);
return ret;