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95 lines
3.4 KiB
Diff
95 lines
3.4 KiB
Diff
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From e5f587242b6072ffab4f4a084a459a59f3035873 Mon Sep 17 00:00:00 2001
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From: Christian Marangi <ansuelsmth@gmail.com>
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Date: Thu, 3 Oct 2024 00:11:43 +0200
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Subject: [PATCH 3/5] block: introduce add_disk_fwnode()
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Introduce add_disk_fwnode() as a replacement of device_add_disk() that
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permits to pass and attach a fwnode to disk dev.
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This variant can be useful for eMMC that might have the partition table
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for the disk defined in DT. A parser can later make use of the attached
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fwnode to parse the related table and init the hardcoded partition for
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the disk.
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device_add_disk() is converted to a simple wrapper of add_disk_fwnode()
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with the fwnode entry set as NULL.
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Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
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Reviewed-by: Christoph Hellwig <hch@lst.de>
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Link: https://lore.kernel.org/r/20241002221306.4403-4-ansuelsmth@gmail.com
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Signed-off-by: Jens Axboe <axboe@kernel.dk>
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---
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block/genhd.c | 28 ++++++++++++++++++++++++----
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include/linux/blkdev.h | 3 +++
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2 files changed, 27 insertions(+), 4 deletions(-)
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--- a/block/genhd.c
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+++ b/block/genhd.c
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@@ -383,16 +383,18 @@ int disk_scan_partitions(struct gendisk
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}
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/**
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- * device_add_disk - add disk information to kernel list
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+ * add_disk_fwnode - add disk information to kernel list with fwnode
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* @parent: parent device for the disk
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* @disk: per-device partitioning information
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* @groups: Additional per-device sysfs groups
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+ * @fwnode: attached disk fwnode
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*
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* This function registers the partitioning information in @disk
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- * with the kernel.
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+ * with the kernel. Also attach a fwnode to the disk device.
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*/
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-int __must_check device_add_disk(struct device *parent, struct gendisk *disk,
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- const struct attribute_group **groups)
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+int __must_check add_disk_fwnode(struct device *parent, struct gendisk *disk,
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+ const struct attribute_group **groups,
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+ struct fwnode_handle *fwnode)
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{
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struct device *ddev = disk_to_dev(disk);
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@@ -451,6 +453,8 @@ int __must_check device_add_disk(struct
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ddev->parent = parent;
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ddev->groups = groups;
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dev_set_name(ddev, "%s", disk->disk_name);
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+ if (fwnode)
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+ device_set_node(ddev, fwnode);
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if (!(disk->flags & GENHD_FL_HIDDEN))
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ddev->devt = MKDEV(disk->major, disk->first_minor);
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ret = device_add(ddev);
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@@ -552,6 +556,22 @@ out_exit_elevator:
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elevator_exit(disk->queue);
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return ret;
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}
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+EXPORT_SYMBOL_GPL(add_disk_fwnode);
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+
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+/**
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+ * device_add_disk - add disk information to kernel list
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+ * @parent: parent device for the disk
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+ * @disk: per-device partitioning information
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+ * @groups: Additional per-device sysfs groups
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+ *
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+ * This function registers the partitioning information in @disk
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+ * with the kernel.
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+ */
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+int __must_check device_add_disk(struct device *parent, struct gendisk *disk,
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+ const struct attribute_group **groups)
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+{
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+ return add_disk_fwnode(parent, disk, groups, NULL);
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+}
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EXPORT_SYMBOL(device_add_disk);
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static void blk_report_disk_dead(struct gendisk *disk, bool surprise)
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--- a/include/linux/blkdev.h
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+++ b/include/linux/blkdev.h
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@@ -741,6 +741,9 @@ static inline unsigned int blk_queue_dep
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#define for_each_bio(_bio) \
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for (; _bio; _bio = _bio->bi_next)
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+int __must_check add_disk_fwnode(struct device *parent, struct gendisk *disk,
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+ const struct attribute_group **groups,
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+ struct fwnode_handle *fwnode);
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int __must_check device_add_disk(struct device *parent, struct gendisk *disk,
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const struct attribute_group **groups);
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static inline int __must_check add_disk(struct gendisk *disk)
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