GPIO_V2_LINE_SET_VALUES_IOCTL¶
Name¶
GPIO_V2_LINE_SET_VALUES_IOCTL - Set the values of requested output lines.
Synopsis¶
-
GPIO_V2_LINE_SET_VALUES_IOCTL¶
int ioctl(int req_fd, GPIO_V2_LINE_SET_VALUES_IOCTL, struct gpio_v2_line_values *values)
Arguments¶
req_fdThe file descriptor of the GPIO character device, as returned in the
request.fdby GPIO_V2_GET_LINE_IOCTL.valuesThe
line_valuesto set with themaskset to indicate the subset of requested lines to set andbitsset to indicate the new value.
Description¶
Set the values of requested output lines.
Only the values of output lines may be set. Attempting to set the value of an input line is an error (EPERM).
Return Value¶
On success 0.
On error -1 and the errno variable is set appropriately.
Common error codes are described in GPIO Error Codes.