diff options
| author | Daniel Golle <daniel@makrotopia.org> | 2023-12-19 02:33:38 +0000 |
|---|---|---|
| committer | Richard Weinberger <richard@nod.at> | 2024-02-25 22:41:33 +0100 |
| commit | 51932f9fc4871619e93abf4de6f1282ec23d936c (patch) | |
| tree | d907318fc870d9104f73713dad248d631a2d3c5e /drivers/mtd | |
| parent | 7e84c961b2eb062d2f47037dcca52dcd1d3615b5 (diff) | |
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 <daniel@makrotopia.org>
Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/ubi/vmt.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/mtd/ubi/vmt.c b/drivers/mtd/ubi/vmt.c index eaf8328f6fc3..5a3558bbb903 100644 --- a/drivers/mtd/ubi/vmt.c +++ b/drivers/mtd/ubi/vmt.c @@ -124,6 +124,31 @@ static void vol_release(struct device *dev) 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 *ubi, struct ubi_mkvol_req *req) 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 @@ -614,6 +640,7 @@ int ubi_add_volume(struct ubi_device *ubi, struct ubi_volume *vol) 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); |