1.. SPDX-License-Identifier: GPL-2.0 2 3.. _GPIO_V2_LINE_SET_VALUES_IOCTL: 4 5***************************** 6GPIO_V2_LINE_SET_VALUES_IOCTL 7***************************** 8 9Name 10==== 11 12GPIO_V2_LINE_SET_VALUES_IOCTL - Set the values of requested output lines. 13 14Synopsis 15======== 16 17.. c:macro:: GPIO_V2_LINE_SET_VALUES_IOCTL 18 19``int ioctl(int req_fd, GPIO_V2_LINE_SET_VALUES_IOCTL, struct gpio_v2_line_values *values)`` 20 21Arguments 22========= 23 24``req_fd`` 25 The file descriptor of the GPIO character device, as returned in the 26 :c:type:`request.fd<gpio_v2_line_request>` by gpio-v2-get-line-ioctl.rst. 27 28``values`` 29 The :c:type:`line_values<gpio_v2_line_values>` to set with the ``mask`` set 30 to indicate the subset of requested lines to set and ``bits`` set to 31 indicate the new value. 32 33Description 34=========== 35 36Set the values of requested output lines. 37 38The values set are logical, indicating if the line is to be active or inactive. 39The ``GPIO_V2_LINE_FLAG_ACTIVE_LOW`` flag controls the mapping between logical 40values (active/inactive) and physical values (high/low). 41If ``GPIO_V2_LINE_FLAG_ACTIVE_LOW`` is not set then active is high and inactive 42is low. If ``GPIO_V2_LINE_FLAG_ACTIVE_LOW`` is set then active is low and 43inactive is high. 44 45Only the values of output lines may be set. 46Attempting to set the value of an input line is an error (**EPERM**). 47 48Return Value 49============ 50 51On success 0. 52 53On error -1 and the ``errno`` variable is set appropriately. 54Common error codes are described in error-codes.rst. 55