From 01cd8c7776d4ab5ebcdeedad504700e2a61acf35 Mon Sep 17 00:00:00 2001
From: Jared Boone <jboone@earfeast.com>
Date: Wed, 21 Dec 2016 22:24:07 -0800
Subject: [PATCH] GPIO: Fix PinConfig -> uint16_t type conversion signature.

---
 firmware/common/gpio.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/firmware/common/gpio.hpp b/firmware/common/gpio.hpp
index 97e69952..69e12c91 100644
--- a/firmware/common/gpio.hpp
+++ b/firmware/common/gpio.hpp
@@ -35,7 +35,7 @@ struct PinConfig {
 	const uint32_t input;
 	const uint32_t ifilt;
 
-	constexpr operator uint16_t() {
+	constexpr operator uint16_t() const {
 		return
 			  (((~ifilt) & 1) << 7)
 			|  ((input   & 1) << 6)