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staging:iio: Documentation, update iio_utils.h for the move to a bus

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Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Jonathan Cameron 2010-05-04 14:43:04 +01:00 committed by Greg Kroah-Hartman
parent 82020b0ef1
commit eaf86ff939
1 changed files with 30 additions and 1 deletions
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31
drivers/staging/iio/Documentation/iio_utils.h
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@ -47,7 +47,7 @@ inline char *find_ring_subelement(const char *directory, const char *subelement)
char *find_type_by_name(const char *name, const char *type)
{
const char *iio_dir = "/sys/class/iio/";
const char *iio_dir = "/sys/bus/iio/devices/";
const struct dirent *ent;
int cnt, pos, pos2;
@ -112,6 +112,35 @@ int write_sysfs_int(char *filename, char *basedir, int val)
return 0;
}
int write_sysfs_int_and_verify(char *filename, char *basedir, int val)
{
int ret;
FILE *sysfsfp;
char temp[100];
int test;
sprintf(temp, "%s%s", basedir, filename);
sysfsfp = fopen(temp, "w");
if (sysfsfp == NULL)
return -1;
fprintf(sysfsfp, "%d", val);
fclose(sysfsfp);
sysfsfp = fopen(temp, "r");
if (sysfsfp == NULL)
return -1;
fscanf(sysfsfp, "%d", &test);
if (test != val) {
printf("Possible failure in int write %d to %s%s\n",
val,
basedir,
filename);
return -1;
}
return 0;
}
/**
* write_sysfs_string_and_verify() - string write, readback and verify
* @filename: name of file to write to