From e61d51dab3fce109dc31ac88dbbc3701ea23bd6d Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Tue, 17 Nov 2015 08:39:06 -0600
Subject: [PATCH] If multiple AT24xx devices are supported and resources are
 allocated, then it may also be necessary to free those resource

---
 drivers/mtd/at24xx.c    | 19 ++++++++++++++++++-
 include/nuttx/mtd/mtd.h | 13 +++++++++++++
 2 files changed, 31 insertions(+), 1 deletion(-)

diff --git a/drivers/mtd/at24xx.c b/drivers/mtd/at24xx.c
index f928f27d4a..9ce0ee31c8 100644
--- a/drivers/mtd/at24xx.c
+++ b/drivers/mtd/at24xx.c
@@ -540,7 +540,7 @@ static int at24c_ioctl(FAR struct mtd_dev_s *dev, int cmd, unsigned long arg)
  * Name: at24c_initialize
  *
  * Description:
- *   Create an initialize MTD device instance.  MTD devices are not registered
+ *   Create an initialized MTD device instance.  MTD devices are not registered
  *   in the file system, but are created as instances that can be bound to
  *   other functions (such as a block or character driver front end).
  *
@@ -618,4 +618,21 @@ FAR struct mtd_dev_s *at24c_initialize(FAR struct i2c_dev_s *dev)
   return (FAR struct mtd_dev_s *)priv;
 }
 
+/************************************************************************************
+ * Name: at24c_uninitialize
+ *
+ * Description:
+ *   Release resources held by an allocated MTD device instance.  Resources are only
+ *   allocated for the case where multiple AT24xx devices are support.
+ *
+ ************************************************************************************/
+
+#ifdef CONFIG_AT24XX_MULTI
+void at24c_uninitialize(FAR struct mtd_dev_s *mtd)
+{
+  FAR struct at24c_dev_s *priv = (FAR struct at24c_dev_s *)mtd;
+  DEBUGASSERT(priv != NULL);
+  kmm_free(priv);
+}
+#endif /* CONFIG_AT24XX_MULTI */
 #endif /* CONFIG_MTD_AT24XX */
diff --git a/include/nuttx/mtd/mtd.h b/include/nuttx/mtd/mtd.h
index 69866d1752..4bd25a612f 100644
--- a/include/nuttx/mtd/mtd.h
+++ b/include/nuttx/mtd/mtd.h
@@ -390,6 +390,19 @@ FAR struct mtd_dev_s *at24c_initialize(FAR struct i2c_dev_s *dev,
 FAR struct mtd_dev_s *at24c_initialize(FAR struct i2c_dev_s *dev);
 #endif
 
+/************************************************************************************
+ * Name: at24c_uninitialize
+ *
+ * Description:
+ *   Release resources held by an allocated MTD device instance.  Resources are only
+ *   allocated for the case where multiple AT24xx devices are support.
+ *
+ ************************************************************************************/
+
+#ifdef CONFIG_AT24XX_MULTI
+void at24c_uninitialize(FAR struct mtd_dev_s *mtd);
+#endif
+
 /****************************************************************************
  * Name: at25_initialize
  *