/**
* fwnode_property_match_string - find a string in an array and return index
* @fwnode: Firmware node to get the property of
* @propname: Name of the property holding the array
* @string: String to look for
*
* Find a given string in a string array and if it is found return the
* index back.
*
* Return: %0 if the property was found (success),
* %-EINVAL if given arguments are not valid,
* %-ENODATA if the property does not have a value,
* %-EPROTO if the property is not an array of strings,
* %-ENXIO if no suitable firmware interface is present.
*/
int fwnode_property_match_string(struct fwnode_handle *fwnode,
const char *propname, const char *string)
{
const char **values;
int nval, ret, i;
nval = fwnode_property_read_string_array(fwnode, propname, NULL, 0);
if (nval < 0)
return nval;
if (nval == 0)
return -ENODATA;
values = kcalloc(nval, sizeof(*values), GFP_KERNEL);
if (!values)
return -ENOMEM;
ret = fwnode_property_read_string_array(fwnode, propname, values, nval);
if (ret < 0)
goto out;
ret = -ENODATA;
for (i = 0; i < nval; i++) {
if (!strcmp(values[i], string)) {
ret = i;
break;
}
}
out:
kfree(values);
return ret;
}
/**
* fwnode_property_match_string - find a string in an array and return index
* @fwnode: Firmware node to get the property of
* @propname: Name of the property holding the array
* @string: String to look for
*
* Find a given string in a string array and if it is found return the
* index back.
*
* Return: %0 if the property was found (success),
* %-EINVAL if given arguments are not valid,
* %-ENODATA if the property does not have a value,
* %-EPROTO if the property is not an array of strings,
* %-ENXIO if no suitable firmware interface is present.
*/
int fwnode_property_match_string(const struct fwnode_handle *fwnode,
const char *propname, const char *string)
{
const char **values;
int nval, ret;
nval = fwnode_property_read_string_array(fwnode, propname, NULL, 0);
if (nval < 0)
return nval;
if (nval == 0)
return -ENODATA;
values = kcalloc(nval, sizeof(*values), GFP_KERNEL);
if (!values)
return -ENOMEM;
ret = fwnode_property_read_string_array(fwnode, propname, values, nval);
if (ret < 0)
goto out;
ret = match_string(values, nval, string);
if (ret < 0)
ret = -ENODATA;
out:
kfree(values);
return ret;
}
/**
* fwnode_property_read_string - return a string property of a firmware node
* @fwnode: Firmware node to get the property of
* @propname: Name of the property
* @val: The value is stored here
*
* Read property @propname from the given firmware node and store the value into
* @val if found. The value is checked to be a string.
*
* Return: %0 if the property was found (success),
* %-EINVAL if given arguments are not valid,
* %-ENODATA if the property does not have a value,
* %-EPROTO or %-EILSEQ if the property is not a string,
* %-ENXIO if no suitable firmware interface is present.
*/
int fwnode_property_read_string(const struct fwnode_handle *fwnode,
const char *propname, const char **val)
{
int ret = fwnode_property_read_string_array(fwnode, propname, val, 1);
return ret < 0 ? ret : 0;
}
/**
* device_property_read_string_array - return a string array property of device
* @dev: Device to get the property of
* @propname: Name of the property
* @val: The values are stored here or %NULL to return the number of values
* @nval: Size of the @val array
*
* Function reads an array of string properties with @propname from the device
* firmware description and stores them to @val if found.
*
* Return: number of values if @val was %NULL,
* %0 if the property was found (success),
* %-EINVAL if given arguments are not valid,
* %-ENODATA if the property does not have a value,
* %-EPROTO or %-EILSEQ if the property is not an array of strings,
* %-EOVERFLOW if the size of the property is not as expected.
* %-ENXIO if no suitable firmware interface is present.
*/
int device_property_read_string_array(struct device *dev, const char *propname,
const char **val, size_t nval)
{
return fwnode_property_read_string_array(dev_fwnode(dev), propname, val, nval);
}
