1 .. SPDX-License-Identifier: GPL-2.0 2 3 .. _GPIO_V2_LINE_SET_VALUES_IOCTL: 4 5 ***************************** 6 GPIO_V2_LINE_SET_VALUES_IOCTL 7 ***************************** 8 9 Name 10 ==== 11 12 GPIO_V2_LINE_SET_VALUES_IOCTL - Set the values of requested output lines. 13 14 Synopsis 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 21 Arguments 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 33 Description 34 =========== 35 36 Set the values of requested output lines. 37 38 The values set are logical, indicating if the line is to be active or inactive. 39 The ``GPIO_V2_LINE_FLAG_ACTIVE_LOW`` flag controls the mapping between logical 40 values (active/inactive) and physical values (high/low). 41 If ``GPIO_V2_LINE_FLAG_ACTIVE_LOW`` is not set then active is high and inactive 42 is low. If ``GPIO_V2_LINE_FLAG_ACTIVE_LOW`` is set then active is low and 43 inactive is high. 44 45 Only the values of output lines may be set. 46 Attempting to set the value of an input line is an error (**EPERM**). 47 48 Return Value 49 ============ 50 51 On success 0. 52 53 On error -1 and the ``errno`` variable is set appropriately. 54 Common error codes are described in error-codes.rst.
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