1.. SPDX-License-Identifier: GPL-2.0 2 3.. _GPIO_GET_CHIPINFO_IOCTL: 4 5*********************** 6GPIO_GET_CHIPINFO_IOCTL 7*********************** 8 9Name 10==== 11 12GPIO_GET_CHIPINFO_IOCTL - Get the publicly available information for a chip. 13 14Synopsis 15======== 16 17.. c:macro:: GPIO_GET_CHIPINFO_IOCTL 18 19``int ioctl(int chip_fd, GPIO_GET_CHIPINFO_IOCTL, struct gpiochip_info *info)`` 20 21Arguments 22========= 23 24``chip_fd`` 25 The file descriptor of the GPIO character device returned by `open()`. 26 27``info`` 28 The :c:type:`chip_info<gpiochip_info>` to be populated. 29 30Description 31=========== 32 33Gets the publicly available information for a particular GPIO chip. 34 35Return Value 36============ 37 38On success 0 and ``info`` is populated with the chip info. 39 40On error -1 and the ``errno`` variable is set appropriately. 41Common error codes are described in error-codes.rst. 42