The sysfs filesystem ABI to load and unload device tree overlays is decribed. Signed-off-by: Heinrich Schuchardt <xypron.glpk@xxxxxx> --- v2: Change sysfs path to /sys/firmware/devicetree/overlays .../ABI/testing/sysfs-firmware-devicetree-overlays | 24 ++++++++++++++++++++++ 1 file changed, 24 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-firmware-devicetree-overlays diff --git a/Documentation/ABI/testing/sysfs-firmware-devicetree-overlays b/Documentation/ABI/testing/sysfs-firmware-devicetree-overlays new file mode 100644 index 0000000..bda0001 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-firmware-devicetree-overlays @@ -0,0 +1,24 @@ +What: /sys/firmware/devicetree/overlays +Date: Dec 2016 +KernelVersion: 4.11 +Contact: Heinrich Schuchardt <xypron.glpk@xxxxxx> +Description: Devicetree overlays can be used to update the devicetree + while the system is running. For details see + Documentation/devicetree/overlay-notes.txt. + + The following attributes are provided: + + load: This is a write only file. + A string written to it is interpreted as the path to a + flattened device tree overlay file. It is used to create + and apply the contained overlays. + + loaded: This is a read only file. + It provides the count of loaded overlays as a decimal + number. + + unload: This is a write only file. + If a positive number n is wrtten to this file the n + most recent overlays are destroyed. + If a negative number is written to this file all + overlays are destroyed. -- 2.10.2 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
