From f9c952de11bd35a83fcaac3d09510772d3905282 Mon Sep 17 00:00:00 2001
From: Marian Buschsieweke <marian.buschsieweke@ml-pa.com>
Date: Thu, 21 Nov 2024 20:26:01 +0100
Subject: [PATCH] boards/adafruit-metro-m4-express: Add I2C and UART Mapping

The M4 Express does now have an I2C and an UART compatible with Arduino
Shields, so we can expose them.
---
 .../Makefile.features                         |  2 ++
 .../include/arduino_iomap.h                   | 22 ++++++++++++++++---
 2 files changed, 21 insertions(+), 3 deletions(-)

diff --git a/boards/adafruit-metro-m4-express/Makefile.features b/boards/adafruit-metro-m4-express/Makefile.features
index acf8475c3f62..12c7dab83d8a 100644
--- a/boards/adafruit-metro-m4-express/Makefile.features
+++ b/boards/adafruit-metro-m4-express/Makefile.features
@@ -19,3 +19,5 @@ FEATURES_PROVIDED += arduino_pins
 FEATURES_PROVIDED += arduino_shield_isp
 FEATURES_PROVIDED += arduino_shield_uno
 FEATURES_PROVIDED += arduino_spi
+FEATURES_PROVIDED += arduino_i2c
+FEATURES_PROVIDED += arduino_uart
diff --git a/boards/adafruit-metro-m4-express/include/arduino_iomap.h b/boards/adafruit-metro-m4-express/include/arduino_iomap.h
index ea620075d5c0..8dc55f42dfda 100644
--- a/boards/adafruit-metro-m4-express/include/arduino_iomap.h
+++ b/boards/adafruit-metro-m4-express/include/arduino_iomap.h
@@ -105,9 +105,25 @@ extern "C" {
  * to a conflicting use of the same SERCOM. If it is available, it is the last
  * SPI bus.
  */
-#if !MODULE_PERIPH_UART
-#  define ARDUINO_SPI_D11D12D13   SPI_DEV(1)
-#endif
+#define ARDUINO_SPI_D11D12D13   SPI_DEV(1)
+/** @} */
+
+/**
+ * @name    Arduino's UART devices
+ * @{
+ */
+#define ARDUINO_UART_D0D1       UART_DEV(0)
+/** @} */
+
+/**
+ * @name    Arduino's I2C buses
+ * @{
+ */
+/**
+ * @brief   The first I2C bus is where shields for the Arduino UNO/Mega expect
+ *          it
+ */
+#define ARDUINO_I2C_UNO         I2C_DEV(0)
 /** @} */
 
 #ifdef __cplusplus