[U-Boot] [PATCH v13 1/7] mtd: uclass: add probe function

[Miquel Raynal <miquel.raynal@bootlin.com>]

The user might want to trigger the probe of any MTD device, export these
functions so they can be called from a command source file.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Jagan Teki <jagan@openedev.com>
Reviewed-by: Stefan Roese <sr@denx.de>
Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com>
---
 drivers/mtd/mtd-uclass.c | 16 ++++++++++++++++
 include/mtd.h            |  2 ++
 2 files changed, 18 insertions(+)

diff --git a/drivers/mtd/mtd-uclass.c b/drivers/mtd/mtd-uclass.c
index 9ca049c437..5418217431 100644
--- a/drivers/mtd/mtd-uclass.c
+++ b/drivers/mtd/mtd-uclass.c
@@ -5,9 +5,25 @@
 
 #include <common.h>
 #include <dm.h>
+#include <dm/device-internal.h>
 #include <errno.h>
 #include <mtd.h>
 
+/**
+ * mtd_probe - Probe the device @dev if not already done
+ *
+ * @dev: U-Boot device to probe
+ *
+ * @return 0 on success, an error otherwise.
+ */
+int mtd_probe(struct udevice *dev)
+{
+	if (device_active(dev))
+		return 0;
+
+	return device_probe(dev);
+}
+
 /*
  * Implement a MTD uclass which should include most flash drivers.
  * The uclass private is pointed to mtd_info.
diff --git a/include/mtd.h b/include/mtd.h
index 548e7f191b..6e6da3002f 100644
--- a/include/mtd.h
+++ b/include/mtd.h
@@ -19,4 +19,6 @@ static inline struct mtd_info *mtd_get_info(struct udevice *dev)
 	return dev_get_uclass_priv(dev);
 }
 
+int mtd_probe(struct udevice *dev);
+
 #endif	/* _MTD_H_ */
-- 
2.17.1