docs/library/machine: Add machine.bootloader docs.
This is provide by a few ports now, and is very useful.
@@ -37,6 +37,14 @@ Reset related functions
Get the reset cause. See :ref:`constants <machine_constants>` for the possible return values.
+.. function:: bootloader([value])
+
+ Reset the device and enter its bootloader. This is typically used to put the
+ device into a state where it can be programmed with new firmware.
+
+ Some ports support passing in an optional *value* argument which can control
+ which bootloader to enter, what to pass to it, or other things.
+
Interrupt related functions
---------------------------
