1 files changed, 159 insertions, 0 deletions
diff --git a/drivers/staging/iio/Documentation/iio_utils.h b/drivers/staging/iio/Documentation/iio_utils.h
new file mode 100644
index 000000000000..74d312473378
--- /dev/null
+++ b/drivers/staging/iio/Documentation/iio_utils.h
@@ -0,0 +1,159 @@
+/* IIO - useful set of util functionality
+ *
+ * Copyright (c) 2008 Jonathan Cameron
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ */
+
+#define IIO_EVENT_CODE_RING_50_FULL 200
+#define IIO_EVENT_CODE_RING_75_FULL 201
+#define IIO_EVENT_CODE_RING_100_FULL 202
+
+struct iio_event_data {
+	int id;
+	__s64 timestamp;
+};
+
+
+inline char *find_ring_subelement(const char *directory, const char *subelement)
+{
+	DIR *dp;
+	const struct dirent *ent;
+	int pos;
+	char temp[100];
+	char *returnstring;
+	dp = opendir(directory);
+	if (dp == NULL) {
+		printf("could not directory: %s\n", directory);
+		return NULL;
+	}
+	while (ent = readdir(dp), ent != NULL) {
+		if (strcmp(ent->d_name, ".") != 0 &&
+		    strcmp(ent->d_name, "..") != 0)  {
+			if (strncmp(ent->d_name, subelement, strlen(subelement)) == 0) {
+				int length = sprintf(temp, "%s%s%s", directory, ent->d_name, "/");
+				returnstring = malloc(length+1);
+				strncpy(returnstring, temp, length+1);
+				return returnstring;
+
+			}
+		}
+	}
+	return 0;
+}
+
+
+char *find_type_by_name(const char *name, const char *type)
+{
+	const char *iio_dir = "/sys/class/iio/";
+	const struct dirent *ent;
+	int cnt, pos, pos2;
+
+	FILE *nameFile;
+	DIR *dp;
+	char thisname[100];
+	char temp[100];
+
+	char *returnstring = NULL;
+	struct stat Stat;
+	pos = sprintf(temp, "%s", iio_dir);
+	dp = opendir(iio_dir);
+	if (dp == NULL) {
+		printf("No industrialio devices available");
+		return NULL;
+	}
+	while (ent = readdir(dp), ent != NULL) {
+		cnt++;
+		/*reject . and .. */
+		if (strcmp(ent->d_name, ".") != 0 &&
+		    strcmp(ent->d_name, "..") != 0)  {
+			/*make sure it isn't a trigger!*/
+			if (strncmp(ent->d_name, type, strlen(type)) == 0) {
+				/* build full path to new file */
+				pos2 = pos + sprintf(temp + pos, "%s/", ent->d_name);
+				sprintf(temp + pos2, "name");
+				printf("search location %s\n", temp);
+				nameFile = fopen(temp, "r");
+				if (!nameFile) {
+					sprintf(temp + pos2, "modalias", ent->d_name);
+					nameFile = fopen(temp, "r");
+					if (!nameFile) {
+						printf("Failed to find a name for device\n");
+						return NULL;
+					}
+				}
+				fscanf(nameFile, "%s", thisname);
+				if (strcmp(name, thisname) == 0) {
+					returnstring = malloc(strlen(temp) + 1);
+					sprintf(temp + pos2, "");
+					strcpy(returnstring, temp);
+					return returnstring;
+				}
+				fclose(nameFile);
+
+			}
+		}
+	}
+}
+
+int write_sysfs_int(char *filename, char *basedir, int val)
+{
+	int ret;
+	FILE  *sysfsfp;
+	char temp[100];
+	sprintf(temp, "%s%s", basedir, filename);
+	sysfsfp = fopen(temp, "w");
+	if (sysfsfp == NULL)
+		return -1;
+	fprintf(sysfsfp, "%d", val);
+	fclose(sysfsfp);
+	return 0;
+}
+
+/**
+ * write_sysfs_string_and_verify() - string write, readback and verify
+ * @filename: name of file to write to
+ * @basedir: the sysfs directory in which the file is to be found
+ * @val: the string to write
+ **/
+int write_sysfs_string_and_verify(char *filename, char *basedir, char *val)
+{
+	int ret;
+	FILE  *sysfsfp;
+	char temp[100];
+	sprintf(temp, "%s%s", basedir, filename);
+	sysfsfp = fopen(temp, "w");
+	if (sysfsfp == NULL)
+		return -1;
+	fprintf(sysfsfp, "%s", val);
+	fclose(sysfsfp);
+
+	sysfsfp = fopen(temp, "r");
+	if (sysfsfp == NULL)
+		return -1;
+	fscanf(sysfsfp, "%s", temp);
+	if (strcmp(temp, val) != 0) {
+		printf("Possible failure in string write %s to %s%s \n",
+		       val,
+		       basedir,
+		       filename);
+		return -1;
+	}
+	return 0;
+}
+
+int read_sysfs_posint(char *filename, char *basedir)
+{
+	int ret;
+	FILE  *sysfsfp;
+	char temp[100];
+	sprintf(temp, "%s%s", basedir, filename);
+	sysfsfp = fopen(temp, "r");
+	if (sysfsfp == NULL)
+		return -1;
+	fscanf(sysfsfp, "%d\n", &ret);
+	fclose(sysfsfp);
+	return ret;
+}