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| author | MyungJoo Ham <myungjoo.ham@samsung.com> | 2012-04-20 07:16:26 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-04-20 18:24:03 +0200 |
| commit | bde68e60b18208978c50c6fb9bdf29826d2887f3 (patch) | |
| tree | 62b48807d48c2454c374bede680c9e9c6cf71a0d /Documentation/braille-console.txt | |
| parent | Extcon: support multiple states at a device. (diff) | |
| download | linux-bde68e60b18208978c50c6fb9bdf29826d2887f3.tar.xz linux-bde68e60b18208978c50c6fb9bdf29826d2887f3.zip | |
Extcon: support mutually exclusive relation between cables.
There could be cables that t recannot be attaches simulatenously. Extcon
device drivers may express such information via mutually_exclusive in
struct extcon_dev.
For example, for an extcon device with 16 cables (bits 0 to 15 are
available), if mutually_exclusive = { 0x7, 0xC0, 0x81, 0 }, then, the
following attachments are prohibitted.
{0, 1}
{0, 2}
{1, 2}
{6, 7}
{0, 7}
and every attachment set that are superset of one of the above.
For the detail, please refer to linux/include/linux/extcon.h.
The concept is suggested by NeilBrown <neilb@suse.de>
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
--
Changes from V5:
- Updated sysfs format
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/braille-console.txt')
0 files changed, 0 insertions, 0 deletions