staging: iio: Add notrigger mode for generic_buffer (b6d5be57) · Commits · 戴 / test

drivers/staging/iio/Documentation/generic_buffer.c

+45 −32

Original line number	Diff line number	Diff line
		@@ -158,11 +158,12 @@ int main(int argc, char **argv)
		char *buffer_access;
		int scan_size;
		int noevents = 0;
		int notrigger = 0;
		char *dummy;

		struct iio_channel_info *channels;

		while ((c = getopt(argc, argv, "l:w:c:et:n:")) != -1) {
		while ((c = getopt(argc, argv, "l:w:c:et:n:g")) != -1) {
		switch (c) {
		case 'n':
		device_name = optarg;
		@@ -183,6 +184,9 @@ int main(int argc, char **argv)
		case 'l':
		buf_len = strtoul(optarg, &dummy, 10);
		break;
		case 'g':
		notrigger = 1;
		break;
		case '?':
		return -1;
		}
		@@ -201,11 +205,13 @@ int main(int argc, char **argv)
		printf("iio device number being used is %d\n", dev_num);

		asprintf(&dev_dir_name, "%siio:device%d", iio_dir, dev_num);

		if (!notrigger) {
		if (trigger_name == NULL) {
		/*
		* Build the trigger name. If it is device associated its
		* name is <device_name>_dev[n] where n matches the device
		* number found above
		* Build the trigger name. If it is device associated
		* its name is <device_name>_dev[n] where n matches
		* the device number found above.
		*/
		ret = asprintf(&trigger_name,
		"%s-dev%d", device_name, dev_num);
		@@ -223,6 +229,8 @@ int main(int argc, char **argv)
		goto error_free_triggername;
		}
		printf("iio trigger number being used is %d\n", trig_num);
		} else
		printf("trigger-less mode selected\n");

		/*
		* Parse the files in scan_elements to identify what channels are
		@@ -246,8 +254,11 @@ int main(int argc, char **argv)
		ret = -ENOMEM;
		goto error_free_triggername;
		}

		if (!notrigger) {
		printf("%s %s\n", dev_dir_name, trigger_name);
		/* Set the device trigger to be the data ready trigger found above */
		/* Set the device trigger to be the data ready trigger found
		* above */
		ret = write_sysfs_string_and_verify("trigger/current_trigger",
		dev_dir_name,
		trigger_name);
		@@ -255,6 +266,7 @@ int main(int argc, char **argv)
		printf("Failed to write current_trigger file\n");
		goto error_free_buf_dir_name;
		}
		}

		/* Setup ring buffer parameters */
		ret = write_sysfs_int("length", buf_dir_name, buf_len);
		@@ -323,6 +335,7 @@ int main(int argc, char **argv)
		if (ret < 0)
		goto error_close_buffer_access;

		if (!notrigger)
		/* Disconnect the trigger - just write a dummy name. */
		write_sysfs_string("trigger/current_trigger",
		dev_dir_name, "NULL");

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