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- From 3a041ee543cdf2e707a1dd72946cd6a583509b28 Mon Sep 17 00:00:00 2001
- From: Daniel Golle <[email protected]>
- Date: Fri, 21 Jul 2023 19:26:37 +0100
- Subject: [PATCH 06/15] mtd: ubi: populate ubi volume fwnode
- Look for the 'volumes' subnode of an MTD partition attached to a UBI
- device and attach matching child nodes to UBI volumes.
- This allows UBI volumes to be referenced in device tree, e.g. for use
- as NVMEM providers.
- Signed-off-by: Daniel Golle <[email protected]>
- ---
- drivers/mtd/ubi/vmt.c | 27 +++++++++++++++++++++++++++
- 1 file changed, 27 insertions(+)
- --- a/drivers/mtd/ubi/vmt.c
- +++ b/drivers/mtd/ubi/vmt.c
- @@ -124,6 +124,31 @@ static void vol_release(struct device *d
- kfree(vol);
- }
-
- +static struct fwnode_handle *find_volume_fwnode(struct ubi_volume *vol)
- +{
- + struct fwnode_handle *fw_vols, *fw_vol;
- + const char *volname;
- + u32 volid;
- +
- + fw_vols = device_get_named_child_node(vol->dev.parent->parent, "volumes");
- + if (!fw_vols)
- + return NULL;
- +
- + fwnode_for_each_child_node(fw_vols, fw_vol) {
- + if (!fwnode_property_read_string(fw_vol, "volname", &volname) &&
- + strncmp(volname, vol->name, vol->name_len))
- + continue;
- +
- + if (!fwnode_property_read_u32(fw_vol, "volid", &volid) &&
- + vol->vol_id != volid)
- + continue;
- +
- + return fw_vol;
- + }
- +
- + return NULL;
- +}
- +
- /**
- * ubi_create_volume - create volume.
- * @ubi: UBI device description object
- @@ -223,6 +248,7 @@ int ubi_create_volume(struct ubi_device
- vol->name_len = req->name_len;
- memcpy(vol->name, req->name, vol->name_len);
- vol->ubi = ubi;
- + device_set_node(&vol->dev, find_volume_fwnode(vol));
-
- /*
- * Finish all pending erases because there may be some LEBs belonging
- @@ -605,6 +631,7 @@ int ubi_add_volume(struct ubi_device *ub
- vol->dev.class = &ubi_class;
- vol->dev.groups = volume_dev_groups;
- dev_set_name(&vol->dev, "%s_%d", ubi->ubi_name, vol->vol_id);
- + device_set_node(&vol->dev, find_volume_fwnode(vol));
- err = device_register(&vol->dev);
- if (err) {
- cdev_del(&vol->cdev);
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