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fc153aa8d9
Similar to supporting nvmem-layouts on MTD devices, also allow referencing UBI and MMC devices in DT. Signed-off-by: Daniel Golle <daniel@makrotopia.org>
66 lines
2.0 KiB
Diff
66 lines
2.0 KiB
Diff
From 3a041ee543cdf2e707a1dd72946cd6a583509b28 Mon Sep 17 00:00:00 2001
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From: Daniel Golle <daniel@makrotopia.org>
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Date: Fri, 21 Jul 2023 19:26:37 +0100
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Subject: [PATCH 06/15] mtd: ubi: populate ubi volume fwnode
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Look for the 'volumes' subnode of an MTD partition attached to a UBI
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device and attach matching child nodes to UBI volumes.
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This allows UBI volumes to be referenced in device tree, e.g. for use
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as NVMEM providers.
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Signed-off-by: Daniel Golle <daniel@makrotopia.org>
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---
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drivers/mtd/ubi/vmt.c | 27 +++++++++++++++++++++++++++
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1 file changed, 27 insertions(+)
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--- a/drivers/mtd/ubi/vmt.c
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+++ b/drivers/mtd/ubi/vmt.c
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@@ -124,6 +124,31 @@ static void vol_release(struct device *d
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kfree(vol);
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}
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+static struct fwnode_handle *find_volume_fwnode(struct ubi_volume *vol)
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+{
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+ struct fwnode_handle *fw_vols, *fw_vol;
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+ const char *volname;
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+ u32 volid;
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+
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+ fw_vols = device_get_named_child_node(vol->dev.parent->parent, "volumes");
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+ if (!fw_vols)
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+ return NULL;
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+
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+ fwnode_for_each_child_node(fw_vols, fw_vol) {
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+ if (!fwnode_property_read_string(fw_vol, "volname", &volname) &&
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+ strncmp(volname, vol->name, vol->name_len))
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+ continue;
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+
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+ if (!fwnode_property_read_u32(fw_vol, "volid", &volid) &&
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+ vol->vol_id != volid)
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+ continue;
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+
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+ return fw_vol;
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+ }
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+
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+ return NULL;
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+}
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+
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/**
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* ubi_create_volume - create volume.
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* @ubi: UBI device description object
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@@ -223,6 +248,7 @@ int ubi_create_volume(struct ubi_device
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vol->name_len = req->name_len;
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memcpy(vol->name, req->name, vol->name_len);
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vol->ubi = ubi;
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+ device_set_node(&vol->dev, find_volume_fwnode(vol));
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/*
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* Finish all pending erases because there may be some LEBs belonging
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@@ -605,6 +631,7 @@ int ubi_add_volume(struct ubi_device *ub
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vol->dev.class = &ubi_class;
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vol->dev.groups = volume_dev_groups;
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dev_set_name(&vol->dev, "%s_%d", ubi->ubi_name, vol->vol_id);
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+ device_set_node(&vol->dev, find_volume_fwnode(vol));
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err = device_register(&vol->dev);
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if (err) {
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cdev_del(&vol->cdev);
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