From: Shivendra Pratap <shivendra.pratap@oss.qualcomm.com>
Date: Tue, 24 Feb 2026 06:42:26 +0000 (+0530)
Subject: Documentation: ABI: Add sysfs-class-reboot-mode-reboot_modes
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=d3da03025e6de538ca5af346c43526a2d5494582;p=thirdparty%2Fkernel%2Flinux.git

Documentation: ABI: Add sysfs-class-reboot-mode-reboot_modes

Add ABI documentation for /sys/class/reboot-mode/*/reboot_modes, a
read-only sysfs attribute exposing the list of supported reboot-mode
arguments. This file is created by reboot-mode framework and provides a
user-readable interface to query available reboot-mode arguments.

Reviewed-by: Bartosz Golaszewski <brgl@kernel.org>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Shivendra Pratap <shivendra.pratap@oss.qualcomm.com>
Link: https://patch.msgid.link/20260224-next-15nov_expose_sysfs-v24-1-4ee5b49d5a06@oss.qualcomm.com
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
---

diff --git a/Documentation/ABI/testing/sysfs-class-reboot-mode-reboot_modes b/Documentation/ABI/testing/sysfs-class-reboot-mode-reboot_modes
new file mode 100644
index 0000000000000..a16c54ab841bb
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-class-reboot-mode-reboot_modes
@@ -0,0 +1,36 @@
+What:		/sys/class/reboot-mode/<driver>/reboot_modes
+Date:		March 2026(TBD)
+KernelVersion:	TBD
+Contact:	linux-pm@vger.kernel.org
+		Description:
+		This interface exposes the reboot-mode arguments
+		registered with the reboot-mode framework. It is
+		a read-only interface and provides a space
+		separated list of reboot-mode arguments supported
+		on the current platform.
+		Example:
+		 recovery fastboot bootloader
+
+		The exact sysfs path may vary depending on the
+		name of the driver that registers the arguments.
+		Example:
+		 /sys/class/reboot-mode/nvmem-reboot-mode/reboot_modes
+		 /sys/class/reboot-mode/syscon-reboot-mode/reboot_modes
+		 /sys/class/reboot-mode/qcom-pon/reboot_modes
+
+		The supported arguments can be used by userspace to
+		invoke device reset using the standard reboot() system
+		call interface, with the "argument" as string to "*arg"
+		parameter along with LINUX_REBOOT_CMD_RESTART2.
+
+		A driver can expose the supported arguments by
+		registering them with the reboot-mode framework
+		using the property names that follow the
+		mode-<argument> format.
+		Example:
+		 mode-bootloader, mode-recovery.
+
+		This attribute is useful for scripts or initramfs
+		logic that need to programmatically determine
+		which reboot-mode arguments are valid before
+		triggering a reboot.