shell: flash: add command to release the current flash device

source/shell/flash.c

@@ -12,6 +12,7 @@
 #include <shell.h>
 
 static void do_flash_probe(const char *s);
+static void do_flash_release(const char *s);
 static void do_flash_info(const char *s);
 static void do_flash_read(const char *s);
 static void do_flash_write(const char *s);
@@ -19,6 +20,7 @@ static void do_flash_erase(const char *s);
 
 static struct cmd flash_cmds[] = {
 	{ "probe", do_flash_probe },
+	{ "release", do_flash_release },
 	{ "info", do_flash_info },
 	{ "read", do_flash_read },
 	{ "write", do_flash_write },
@@ -110,6 +112,17 @@ static void do_flash_probe(const char *s)
 	}
 }
 
+static void do_flash_release(const char *s)
+{
+	(void)s;
+
+	if (!flash)
+		return;
+
+	flash_release(flash);
+	flash = NULL;
+}
+
 static void do_flash_info(const char *s)
 {
 	size_t size, capacity;