[U-Boot] [RFC 04/11] misc: fs_loader: Allow initializing blkdev using platform data

[Andreas Dannenberg <dannenberg@ti.com>]

To give us more flexibility using the FS loader eliminate the need of
always having to use the ENV to configure the block device but rather
allow the respective block device and partition to be setup through
platform data.

Signed-off-by: Andreas Dannenberg <dannenberg@ti.com>
---
 drivers/misc/fs_loader.c | 17 ++++++++++++++++-
 include/fs_loader.h      |  4 ++++
 2 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/drivers/misc/fs_loader.c b/drivers/misc/fs_loader.c
index f42eeff8f6..69f474da99 100644
--- a/drivers/misc/fs_loader.c
+++ b/drivers/misc/fs_loader.c
@@ -81,6 +81,15 @@ static int select_fs_dev(struct device_platdata *plat)
 				return -ENODEV;
 			}
 		}
+	} else if (plat->blkdev) {
+		struct blk_desc *desc = blk_get_by_device(plat->blkdev);
+
+		if (desc) {
+			ret = fs_set_blk_dev_with_part(desc, plat->blkpart);
+		} else {
+			debug("%s: No device found\n", __func__);
+			return -ENODEV;
+		}
 	} else if (plat->mtdpart && plat->ubivol) {
 		ret = mount_ubifs(plat->mtdpart, plat->ubivol);
 		if (ret)
@@ -138,13 +147,18 @@ static int _request_firmware_prepare(struct udevice *dev,
 static int fw_get_filesystem_firmware(struct udevice *dev)
 {
 	loff_t actread;
-	char *storage_interface, *dev_part, *ubi_mtdpart, *ubi_volume;
+	char *storage_interface = NULL;
+	char *dev_part = NULL;
+	char *ubi_mtdpart = NULL;
+	char *ubi_volume = NULL;
 	int ret;
 
+#if CONFIG_IS_ENABLED(ENV_SUPPORT)
 	storage_interface = env_get("storage_interface");
 	dev_part = env_get("fw_dev_part");
 	ubi_mtdpart = env_get("fw_ubi_mtdpart");
 	ubi_volume = env_get("fw_ubi_volume");
+#endif
 
 	if (storage_interface && dev_part) {
 		ret = fs_set_blk_dev(storage_interface, dev_part, FS_TYPE_ANY);
@@ -159,6 +173,7 @@ static int fw_get_filesystem_firmware(struct udevice *dev)
 		else
 			ret = -ENODEV;
 	} else {
+		debug("%s: init via platdata\n", __func__);
 		ret = select_fs_dev(dev->platdata);
 	}
 
diff --git a/include/fs_loader.h b/include/fs_loader.h
index b728c06fcf..adaa2b5db8 100644
--- a/include/fs_loader.h
+++ b/include/fs_loader.h
@@ -28,11 +28,15 @@ struct phandle_part {
  * This holds information about all supported storage devices for driver use.
  *
  * @phandlepart: Attribute data for block device.
+ * @blkdev: Block device (alternative to using phandlepart)
+ * @blkpart: Partition number of block device (alternative to using phandlepart)
  * @mtdpart: MTD partition for ubi partition.
  * @ubivol: UBI volume-name for ubifsmount.
  */
 struct device_platdata {
 	struct phandle_part phandlepart;
+	struct udevice *blkdev;
+	u32 blkpart;
 	char *mtdpart;
 	char *ubivol;
 };
-- 
2.17.1