From 909a554dbd4ec10fd0e24528151de4024fd8844e Mon Sep 17 00:00:00 2001
From: tekktrik <89490472+tekktrik@users.noreply.github.com>
Date: Mon, 7 Feb 2022 18:10:09 -0500
Subject: [PATCH] Expand AnalogIn.reference_voltage description

---
 shared-bindings/analogio/AnalogIn.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/shared-bindings/analogio/AnalogIn.c b/shared-bindings/analogio/AnalogIn.c
index e1f9f195c8..636c2500bf 100644
--- a/shared-bindings/analogio/AnalogIn.c
+++ b/shared-bindings/analogio/AnalogIn.c
@@ -126,7 +126,8 @@ const mp_obj_property_t analogio_analogin_value_obj = {
 
 //|     reference_voltage: float
 //|     """The maximum voltage measurable (also known as the reference voltage) as a
-//|     `float` in Volts."""
+//|     `float` in Volts.  Note the ADC value may not scale to the actual voltage linearly
+//|     at ends of the analog range."""
 //|
 STATIC mp_obj_t analogio_analogin_obj_get_reference_voltage(mp_obj_t self_in) {
     analogio_analogin_obj_t *self = MP_OBJ_TO_PTR(self_in);