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Currently, there is no standardized mechanism for userspace to discover supported reboot modes on a platform. This limits userspace scripts, to rely on hardcoded assumptions about the available reboot-modes. Create a class 'reboot-mode' and a device under it. Use the name of the registering driver as device name. Expose a sysfs interface under this device to show available reboot mode arguments. This results in the creation of: /sys/class/reboot-mode/<driver>/reboot_modes This read-only sysfs file will exposes the supported reboot mode arguments provided by the registering driver, enabling userspace to query the list of arguments. Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com> Signed-off-by: Shivendra Pratap <shivendra.pratap@oss.qualcomm.com> Link: https://patch.msgid.link/20260224-next-15nov_expose_sysfs-v24-2-4ee5b49d5a06@oss.qualcomm.com Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>