From 96da997b234cd12d5c5391a8a1cd01710bf89386 Mon Sep 17 00:00:00 2001
From: SPRESENSE <41312067+SPRESENSE@users.noreply.github.com>
Date: Wed, 1 Mar 2023 14:29:03 +0900
Subject: [PATCH] boards: spresense: Add board function for eMMC finalization

- Un-mount the FAT filesystem for eMMC
- Un-initialize eMMC driver
- Turn off the eMMC device
---
 boards/arm/cxd56xx/common/src/cxd56_emmcdev.c | 43 +++++++++++++++++++
 .../cxd56xx/spresense/include/cxd56_emmcdev.h |  1 +
 2 files changed, 44 insertions(+)

diff --git a/boards/arm/cxd56xx/common/src/cxd56_emmcdev.c b/boards/arm/cxd56xx/common/src/cxd56_emmcdev.c
index 03925c5b2a..28acb2fe97 100644
--- a/boards/arm/cxd56xx/common/src/cxd56_emmcdev.c
+++ b/boards/arm/cxd56xx/common/src/cxd56_emmcdev.c
@@ -24,6 +24,8 @@
 
 #include <nuttx/config.h>
 
+#include <sys/mount.h>
+
 #include <stdio.h>
 #include <errno.h>
 #include <debug.h>
@@ -84,3 +86,44 @@ int board_emmc_initialize(void)
 
   return ret;
 }
+
+/****************************************************************************
+ * Name: board_emmc_finalize
+ *
+ * Description:
+ *   Finalize the eMMC device and umount the file system.
+ *
+ ****************************************************************************/
+
+int board_emmc_finalize(void)
+{
+  int ret;
+
+  /* Un-mount the eMMC device */
+
+  ret = nx_umount2("/mnt/emmc", MNT_DETACH);
+  if (ret < 0)
+    {
+      ferr("ERROR: Failed to umount the eMMC. %d\n", ret);
+      return ret;
+    }
+
+  /* Uninitialize the eMMC device */
+
+  ret = cxd56_emmcuninitialize();
+  if (ret < 0)
+    {
+      ferr("ERROR: Failed to uninitialize eMMC. %d\n", ret);
+      return ret;
+    }
+
+  /* Power off the eMMC device */
+
+  ret = board_power_control(POWER_EMMC, false);
+  if (ret)
+    {
+      ferr("ERROR: Failed to power off eMMC. %d\n", ret);
+    }
+
+  return ret;
+}
diff --git a/boards/arm/cxd56xx/spresense/include/cxd56_emmcdev.h b/boards/arm/cxd56xx/spresense/include/cxd56_emmcdev.h
index f0f24f1a2b..a5d3ebf311 100644
--- a/boards/arm/cxd56xx/spresense/include/cxd56_emmcdev.h
+++ b/boards/arm/cxd56xx/spresense/include/cxd56_emmcdev.h
@@ -60,6 +60,7 @@ extern "C"
 
 #ifdef CONFIG_CXD56_EMMC
 int board_emmc_initialize(void);
+int board_emmc_finalize(void);
 #endif
 
 #undef EXTERN