1 .. SPDX-License-Identifier: GPL-2.0 2 3 .. _GPIO_HANDLE_SET_LINE_VALUES_IOCTL: 4 5 ********************************* 6 GPIO_HANDLE_SET_LINE_VALUES_IOCTL 7 ********************************* 8 .. warning:: 9 This ioctl is part of chardev_v1.rst and is obsoleted by 10 gpio-v2-line-set-values-ioctl.rst. 11 12 Name 13 ==== 14 15 GPIO_HANDLE_SET_LINE_VALUES_IOCTL - Set the values of all requested output lines. 16 17 Synopsis 18 ======== 19 20 .. c:macro:: GPIO_HANDLE_SET_LINE_VALUES_IOCTL 21 22 ``int ioctl(int handle_fd, GPIO_HANDLE_SET_LINE_VALUES_IOCTL, struct gpiohandle_data *values)`` 23 24 Arguments 25 ========= 26 27 ``handle_fd`` 28 The file descriptor of the GPIO character device, as returned in the 29 :c:type:`request.fd<gpiohandle_request>` by gpio-get-linehandle-ioctl.rst. 30 31 ``values`` 32 The :c:type:`line_values<gpiohandle_data>` to set. 33 34 Description 35 =========== 36 37 Set the values of all requested output lines. 38 39 The values set are logical, indicating if the line is to be active or inactive. 40 The ``GPIOHANDLE_REQUEST_ACTIVE_LOW`` flag controls the mapping between logical 41 values (active/inactive) and physical values (high/low). 42 If ``GPIOHANDLE_REQUEST_ACTIVE_LOW`` is not set then active is high and 43 inactive is low. If ``GPIOHANDLE_REQUEST_ACTIVE_LOW`` is set then active is low 44 and inactive is high. 45 46 Only the values of output lines may be set. 47 Attempting to set the value of input lines is an error (**EPERM**). 48 49 Return Value 50 ============ 51 52 On success 0. 53 54 On error -1 and the ``errno`` variable is set appropriately. 55 Common error codes are described in error-codes.rst.
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