From 867d87dac9f8a6c536b815805c209a2aa5602e7a Mon Sep 17 00:00:00 2001
From: SPRESENSE <41312067+SPRESENSE@users.noreply.github.com>
Date: Tue, 22 Nov 2022 11:55:56 +0900
Subject: [PATCH] arch: cxd56xx: Fix eMMC uninitialize function

- Fix prototype function with prefix of cxd56.
- Add logic to unregister blockdriver.
- Minor fix nxstyle.
---
 arch/arm/src/cxd56xx/cxd56_emmc.c | 24 ++++++++++++++++--------
 arch/arm/src/cxd56xx/cxd56_emmc.h |  2 +-
 2 files changed, 17 insertions(+), 9 deletions(-)

diff --git a/arch/arm/src/cxd56xx/cxd56_emmc.c b/arch/arm/src/cxd56xx/cxd56_emmc.c
index 39555781188e7..17223d0536523 100644
--- a/arch/arm/src/cxd56xx/cxd56_emmc.c
+++ b/arch/arm/src/cxd56xx/cxd56_emmc.c
@@ -942,6 +942,10 @@ static int cxd56_emmc_geometry(struct inode *inode,
   return OK;
 }
 
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
 int cxd56_emmcinitialize(void)
 {
   struct cxd56_emmc_state_s *priv;
@@ -984,21 +988,25 @@ int cxd56_emmcinitialize(void)
     }
 
   ret = register_blockdriver("/dev/emmc0", &g_bops, 0, priv);
-  if (ret)
+  if (ret < 0)
     {
       ferr("register_blockdriver failed: %d\n", -ret);
-      return ret;
     }
 
-  return OK;
+  return ret;
 }
 
-/****************************************************************************
- * Public Functions
- ****************************************************************************/
-
-int emmc_uninitialize(void)
+int cxd56_emmcuninitialize(void)
 {
+  int ret;
+
+  ret = unregister_blockdriver("/dev/emmc0");
+  if (ret < 0)
+    {
+      ferr("unregister_blockdriver failed: %d\n", -ret);
+      return ret;
+    }
+
   /* Send power off command */
 
   emmc_switchcmd(EXTCSD_PON, EXTCSD_PON_POWERED_OFF_LONG);
diff --git a/arch/arm/src/cxd56xx/cxd56_emmc.h b/arch/arm/src/cxd56xx/cxd56_emmc.h
index 91f3211e43944..5dcd35cee2675 100644
--- a/arch/arm/src/cxd56xx/cxd56_emmc.h
+++ b/arch/arm/src/cxd56xx/cxd56_emmc.h
@@ -43,7 +43,7 @@ extern "C"
  ****************************************************************************/
 
 int cxd56_emmcinitialize(void);
-void cxd56_emmcuninitialize(void);
+int cxd56_emmcuninitialize(void);
 
 #undef EXTERN
 #ifdef __cplusplus