Based on kernel version 6.11
. Page generated on 2024-09-24 08:21 EST
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 | .. SPDX-License-Identifier: GPL-2.0 .. _GPIO_GET_LINEINFO_IOCTL: *********************** GPIO_GET_LINEINFO_IOCTL *********************** .. warning:: This ioctl is part of chardev_v1.rst and is obsoleted by gpio-v2-get-lineinfo-ioctl.rst. Name ==== GPIO_GET_LINEINFO_IOCTL - Get the publicly available information for a line. Synopsis ======== .. c:macro:: GPIO_GET_LINEINFO_IOCTL ``int ioctl(int chip_fd, GPIO_GET_LINEINFO_IOCTL, struct gpioline_info *info)`` Arguments ========= ``chip_fd`` The file descriptor of the GPIO character device returned by `open()`. ``info`` The :c:type:`line_info<gpioline_info>` to be populated, with the ``offset`` field set to indicate the line to be collected. Description =========== Get the publicly available information for a line. This information is available independent of whether the line is in use. .. note:: The line info does not include the line value. The line must be requested using gpio-get-linehandle-ioctl.rst or gpio-get-lineevent-ioctl.rst to access its value. 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. |