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: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Shivendra Pratap <shivendra.pratap@oss.qualcomm.com>
---
 .../testing/sysfs-class-reboot-mode-reboot_modes   | 36 ++++++++++++++++++++++
 1 file changed, 36 insertions(+)

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 0000000000000000000000000000000000000000..a50f9433942b8cab4cb3d699e9c0955299ec48f0
--- /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:		November 2025
+KernelVersion:	6.18.0-rc5
+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.

-- 
2.34.1

On Sun, Nov 30, 2025 at 7:21 PM Shivendra Pratap
<shivendra.pratap@oss.qualcomm.com> wrote:
>
> 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: Sebastian Reichel <sebastian.reichel@collabora.com>
> Signed-off-by: Shivendra Pratap <shivendra.pratap@oss.qualcomm.com>
> ---

Ah, nevermind my comment under the other patch about documenting it.

Reviewed-by: Bartosz Golaszewski <brgl@kernel.org>