From 6e22092c67a3cc52d5d0bf56e9b746fb12cffaa7 Mon Sep 17 00:00:00 2001
From: Alan Carvalho de Assis <acassis@gmail.com>
Date: Tue, 28 Nov 2017 12:23:02 -0600
Subject: [PATCH] configs/stm32f4discovery/src:  Add stm32f4discovery board
 support for Nunchuck joystick

---
 configs/stm32f4discovery/src/Makefile           |  4 ++++
 configs/stm32f4discovery/src/stm32_bringup.c    | 10 ++++++++++
 configs/stm32f4discovery/src/stm32f4discovery.h | 12 ++++++++++++
 3 files changed, 26 insertions(+)

diff --git a/configs/stm32f4discovery/src/Makefile b/configs/stm32f4discovery/src/Makefile
index 68c8eae9813..535440d6e52 100644
--- a/configs/stm32f4discovery/src/Makefile
+++ b/configs/stm32f4discovery/src/Makefile
@@ -72,6 +72,10 @@ ifeq ($(CONFIG_LCD_ST7567),y)
   CSRCS += stm32_st7567.c
 endif
 
+ifeq ($(CONFIG_INPUT_NUNCHUCK),y)
+  CSRCS += stm32_nunchuck.c
+endif
+
 ifeq ($(CONFIG_SENSORS_MAX31855),y)
 CSRCS += stm32_max31855.c
 endif
diff --git a/configs/stm32f4discovery/src/stm32_bringup.c b/configs/stm32f4discovery/src/stm32_bringup.c
index 5e9b1a86e8a..16349a413c3 100644
--- a/configs/stm32f4discovery/src/stm32_bringup.c
+++ b/configs/stm32f4discovery/src/stm32_bringup.c
@@ -208,6 +208,16 @@ int stm32_bringup(void)
     }
 #endif
 
+#ifdef CONFIG_INPUT_NUNCHUCK
+  /* Register the Nunchuck driver */
+
+  ret = nunchuck_initialize("/dev/nunchuck0");
+  if (ret < 0)
+    {
+      syslog(LOG_ERR, "ERROR: nunchuck_initialize() failed: %d\n", ret);
+    }
+#endif
+
 #ifdef CONFIG_SENSORS_QENCODER
   /* Initialize and register the qencoder driver */
 
diff --git a/configs/stm32f4discovery/src/stm32f4discovery.h b/configs/stm32f4discovery/src/stm32f4discovery.h
index 45efcd76017..ef4cae05947 100644
--- a/configs/stm32f4discovery/src/stm32f4discovery.h
+++ b/configs/stm32f4discovery/src/stm32f4discovery.h
@@ -453,6 +453,18 @@ int stm32_bmp180initialize(FAR const char *devpath);
 int stm32_lis3dshinitialize(FAR const char *devpath);
 #endif
 
+/****************************************************************************
+ * Name: nunchuck_initialize
+ *
+ * Description:
+ *   Initialize and register the button joystick driver
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_INPUT_NUNCHUCK
+int nunchuck_initialize(FAR char *devname);
+#endif
+
 /****************************************************************************
  * Name: stm32_bringup
  *