[PATCH v2 5/6] drivers: nvme: Export nvme_shutdown()

[dmukhin at ford.com]

From: Denis Mukhin <dmukhin at ford.com> 

Make nvme_shutdown() public so that it can be re-used in
board-specific board_quiesce_devices() before OS hand-off.

Signed-off-by: Denis Mukhin <dmukhin at ford.com>
---
Changes since v1:
- n/a
---
 drivers/nvme/nvme.h |  7 -------
 include/nvme.h      | 11 +++++++++++
 2 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/drivers/nvme/nvme.h b/drivers/nvme/nvme.h
index bc1d612dde40..25a8b0b17772 100644
--- a/drivers/nvme/nvme.h
+++ b/drivers/nvme/nvme.h
@@ -698,11 +698,4 @@ struct nvme_ops {
  */
 int nvme_init(struct udevice *udev);
 
-/**
- * nvme_shutdown() - Shutdown NVM Express device
- * @udev:	The NVM Express device
- * Return: 0 if OK, -ve on error
- */
-int nvme_shutdown(struct udevice *udev);
-
 #endif /* __DRIVER_NVME_H__ */
diff --git a/include/nvme.h b/include/nvme.h
index 2cdf8ce320c1..c7b301300097 100644
--- a/include/nvme.h
+++ b/include/nvme.h
@@ -90,4 +90,15 @@ int nvme_print_info(struct udevice *udev);
  */
 int nvme_get_namespace_id(struct udevice *udev, u32 *ns_id, u8 *eui64);
 
+/**
+ * nvme_shutdown() - Shutdown NVM Express device
+ *
+ * Must be called before booting an OS to ensure cache is flushed
+ * and the controller is in a clean state for OS to re-initialize.
+ *
+ * @udev:	The NVM Express device
+ * Return: 0 if OK, -ve on error
+ */
+int nvme_shutdown(struct udevice *udev);
+
 #endif /* __NVME_H__ */
-- 
2.54.0