• Daniel Baluta's avatar
    configfs: allow dynamic group creation · 5cf6a51e
    Daniel Baluta authored
    This patchset introduces IIO software triggers, offers a way of configuring
    them via configfs and adds the IIO hrtimer based interrupt source to be used
    with software triggers.
    
    The architecture is now split in 3 parts, to remove all IIO trigger specific
    parts from IIO configfs core:
    
    (1) IIO configfs - creates the root of the IIO configfs subsys.
    (2) IIO software triggers - software trigger implementation, dynamically
        creating /config/iio/triggers group.
    (3) IIO hrtimer trigger - is the first interrupt source for software triggers
        (with syfs to follow). Each trigger type can implement its own set of
        attributes.
    
    Lockdep seems to be happy with the locking in configfs patch.
    
    This patch (of 5):
    
    We don't want to hardcode default groups at subsystem
    creation time. We export:
    	* configfs_register_group
    	* configfs_unregister_group
    to allow drivers to programatically create/destroy groups
    later, after module init time.
    
    This is needed for IIO configfs support.
    
    (akpm: the other 4 patches to be merged via the IIO tree)
    Signed-off-by: default avatarDaniel Baluta <daniel.baluta@intel.com>
    Suggested-by: default avatarLars-Peter Clausen <lars@metafoo.de>
    Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
    Acked-by: default avatarJoel Becker <jlbec@evilplan.org>
    Cc: Hartmut Knaack <knaack.h@gmx.de>
    Cc: Octavian Purdila <octavian.purdila@intel.com>
    Cc: Paul Bolle <pebolle@tiscali.nl>
    Cc: Adriana Reus <adriana.reus@intel.com>
    Cc: Cristina Opriceana <cristina.opriceana@gmail.com>
    Cc: Peter Meerwald <pmeerw@pmeerw.net>
    Cc: Alexander Viro <viro@zeniv.linux.org.uk>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    5cf6a51e
dir.c 46.5 KB