| .. SPDX-License-Identifier: GPL-2.0 |
| |
| .. _GPIO_GET_CHIPINFO_IOCTL: |
| |
| *********************** |
| GPIO_GET_CHIPINFO_IOCTL |
| *********************** |
| |
| Name |
| ==== |
| |
| GPIO_GET_CHIPINFO_IOCTL - Get the publicly available information for a chip. |
| |
| Synopsis |
| ======== |
| |
| .. c:macro:: GPIO_GET_CHIPINFO_IOCTL |
| |
| ``int ioctl(int chip_fd, GPIO_GET_CHIPINFO_IOCTL, struct gpiochip_info *info)`` |
| |
| Arguments |
| ========= |
| |
| ``chip_fd`` |
| The file descriptor of the GPIO character device returned by `open()`. |
| |
| ``info`` |
| The :c:type:`chip_info<gpiochip_info>` to be populated. |
| |
| Description |
| =========== |
| |
| Gets the publicly available information for a particular GPIO chip. |
| |
| Return Value |
| ============ |
| |
| On success 0 and ``info`` is populated with the chip info. |
| |
| On error -1 and the ``errno`` variable is set appropriately. |
| Common error codes are described in error-codes.rst. |
