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mtd: create per-device and module-scope debugfs entries

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Several MTD devices are using debugfs entries created in the root.
This commit provides the means for a standardized subtree, creating
one "mtd" entry at root, and one entry per device inside it, named
after the device.
The tree is registered in add_mtd_device, and released in
del_mtd_device.
Devices docg3, mtdswap and nandsim were updated to use this subtree
instead of custom ones, and their entries were prefixed with the
drivers' names.

Signed-off-by: Mario J. Rugiero <mrugiero@gmail.com>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
This commit is contained in:
Mario Rugiero 2017-05-29 08:38:41 -03:00 • committed by Brian Norris
parent 5771a8c088
commit e8e3edb95c
6 changed files with 57 additions and 82 deletions
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10
include/linux/mtd/mtd.h
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@ -206,6 +206,15 @@ struct mtd_pairing_scheme {
struct module; /* only needed for owner field in mtd_info */
/**
* struct mtd_debug_info - debugging information for an MTD device.
*
* @dfs_dir: direntry object of the MTD device debugfs directory
*/
struct mtd_debug_info {
struct dentry *dfs_dir;
};
struct mtd_info {
u_char type;
uint32_t flags;
@ -346,6 +355,7 @@ struct mtd_info {
struct module *owner;
struct device dev;
int usecount;
struct mtd_debug_info dbg;
};
int mtd_ooblayout_ecc(struct mtd_info *mtd, int section,