[PATCH 5/8] nvme: Add shutdown function

[Mark Kettenis]

Add a function to disable the NVMe controller. This will be used
to let the driver for the NVMe storage integrated on Apple SoCs
shutdown the NVMe controller such we can shutdown the NVMe
IOP controller in a clean way afterwards before handing control
to the OS.

Signed-off-by: Mark Kettenis <kettenis at openbsd.org>
---
 drivers/nvme/nvme.c | 7 +++++++
 drivers/nvme/nvme.h | 1 +
 2 files changed, 8 insertions(+)

diff --git a/drivers/nvme/nvme.c b/drivers/nvme/nvme.c
index e2d0f9c668..3b1a5c718f 100644
--- a/drivers/nvme/nvme.c
+++ b/drivers/nvme/nvme.c
@@ -896,3 +896,10 @@ free_queue:
 free_nvme:
 	return ret;
 }
+
+int nvme_shutdown(struct udevice *udev)
+{
+	struct nvme_dev *ndev = dev_get_priv(udev);
+
+	return nvme_disable_ctrl(ndev);
+}
diff --git a/drivers/nvme/nvme.h b/drivers/nvme/nvme.h
index 57803b43fd..6e39af8831 100644
--- a/drivers/nvme/nvme.h
+++ b/drivers/nvme/nvme.h
@@ -670,5 +670,6 @@ struct nvme_ops {
 };
 
 int nvme_init(struct udevice *udev);
+int nvme_shutdown(struct udevice *udev);
 
 #endif /* __DRIVER_NVME_H__ */
-- 
2.34.1