@brief Set the direction of a set of GPIO lines to output.
@param bulk Set of GPIO lines.
@param values An array holding line_bulk->num_lines new logical values
for lines. A NULL pointer is interpreted as a logical low
for all lines.
@return 0 is the operation succeeds. In case of an error this routine
returns -1 and sets the last error number.
If the lines were not previously requested together, the behavior is
undefined.
@brief Set the direction of a set of GPIO lines to output. @param bulk Set of GPIO lines. @param values An array holding line_bulk->num_lines new logical values for lines. A NULL pointer is interpreted as a logical low for all lines. @return 0 is the operation succeeds. In case of an error this routine returns -1 and sets the last error number.
If the lines were not previously requested together, the behavior is undefined.