Documentation/userspace-api/gpio/gpio-v2-line-set-values-ioctl.rst
.. SPDX-License-Identifier: GPL-2.0
.. _GPIO_V2_LINE_SET_VALUES_IOCTL:
GPIO_V2_LINE_SET_VALUES_IOCTL
GPIO_V2_LINE_SET_VALUES_IOCTL - Set the values of requested output lines.
.. c:macro:: GPIO_V2_LINE_SET_VALUES_IOCTL
int ioctl(int req_fd, GPIO_V2_LINE_SET_VALUES_IOCTL, struct gpio_v2_line_values *values)
req_fd
The file descriptor of the GPIO character device, as returned in the
:c:type:request.fd<gpio_v2_line_request> by gpio-v2-get-line-ioctl.rst.
values
The :c:type:line_values<gpio_v2_line_values> to set with the mask set
to indicate the subset of requested lines to set and bits set to
indicate the new value.
Set the values of requested output lines.
The values set are logical, indicating if the line is to be active or inactive.
The GPIO_V2_LINE_FLAG_ACTIVE_LOW flag controls the mapping between logical
values (active/inactive) and physical values (high/low).
If GPIO_V2_LINE_FLAG_ACTIVE_LOW is not set then active is high and inactive
is low. If GPIO_V2_LINE_FLAG_ACTIVE_LOW is set then active is low and
inactive is high.
Only the values of output lines may be set. Attempting to set the value of an input line is an error (EPERM).
On success 0.
On error -1 and the errno variable is set appropriately.
Common error codes are described in error-codes.rst.