From 37c058354e4c46c1c5394af111b128c366a1c8e3 Mon Sep 17 00:00:00 2001
From: Jared Boone <jboone@earfeast.com>
Date: Wed, 31 May 2017 11:34:16 -0700
Subject: [PATCH] WM8731: Add method to detect codec is present.

Used to determine PortaPack hardware version.
---
 firmware/common/wm8731.cpp | 4 ++++
 firmware/common/wm8731.hpp | 2 ++
 2 files changed, 6 insertions(+)

diff --git a/firmware/common/wm8731.cpp b/firmware/common/wm8731.cpp
index b0b27151..e4c01b1b 100644
--- a/firmware/common/wm8731.cpp
+++ b/firmware/common/wm8731.cpp
@@ -87,6 +87,10 @@ void WM8731::init() {
 	headphone_mute();
 }
 
+bool WM8731::detected() {
+	return reset();
+}
+
 bool WM8731::reset() {
 	return write(0x0f, 0);
 }
diff --git a/firmware/common/wm8731.hpp b/firmware/common/wm8731.hpp
index 1f6b3e53..bca090e9 100644
--- a/firmware/common/wm8731.hpp
+++ b/firmware/common/wm8731.hpp
@@ -292,6 +292,8 @@ public:
 
 	bool reset();
 
+	bool detected();
+
 	void set_line_in_volume(const volume_t volume) {
 		const auto normalized = line_in_gain_range.normalize(volume);
 		auto n = normalized.centibel() / 15;