From 391927c12634e3b80882499de5e92740c8472452 Mon Sep 17 00:00:00 2001
From: Damien George <damien.p.george@gmail.com>
Date: Thu, 30 Apr 2020 23:50:53 +1000
Subject: [PATCH] docs/library: Note that machine.Pin.irq's hard arg may not be
 supported.

---
 docs/library/machine.Pin.rst | 1 +
 1 file changed, 1 insertion(+)

diff --git a/docs/library/machine.Pin.rst b/docs/library/machine.Pin.rst
index 5254e163c0..3055491ebb 100644
--- a/docs/library/machine.Pin.rst
+++ b/docs/library/machine.Pin.rst
@@ -216,6 +216,7 @@ Methods
      - ``hard`` if true a hardware interrupt is used. This reduces the delay
        between the pin change and the handler being called. Hard interrupt
        handlers may not allocate memory; see :ref:`isr_rules`.
+       Not all ports support this argument.
 
    This method returns a callback object.