[media] rc: add wakeup_protocols sysfs file

Add a wakeup_protocols sysfs file which controls the new
rc_dev::enabled_protocols[RC_FILTER_WAKEUP], which is the mask of
protocols that are used for the wakeup filter.

A new RC driver callback change_wakeup_protocol() is called to change
the wakeup protocol mask.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Reviewed-by: Antti Seppälä <a.seppala@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

1 files changed, 21 insertions, 2 deletions

diff --git a/Documentation/ABI/testing/sysfs-class-rc b/Documentation/ABI/testing/sysfs-class-rc
index c0e1d14cae6e..b65674da43bb 100644
--- a/Documentation/ABI/testing/sysfs-class-rc
+++ b/Documentation/ABI/testing/sysfs-class-rc
@@ -61,6 +61,25 @@ Description:
                 an error.
                 This value may be reset to 0 if the current protocol is altered.
 
+What:           /sys/class/rc/rcN/wakeup_protocols
+Date:           Feb 2014
+KernelVersion:  3.15
+Contact:        Mauro Carvalho Chehab <m.chehab@samsung.com>
+Description:
+                Reading this file returns a list of available protocols to use
+                for the wakeup filter, something like:
+                    "rc5 rc6 nec jvc [sony]"
+                The enabled wakeup protocol is shown in [] brackets.
+                Writing "+proto" will add a protocol to the list of enabled
+                wakeup protocols.
+                Writing "-proto" will remove a protocol from the list of enabled
+                wakeup protocols.
+                Writing "proto" will use "proto" for wakeup events.
+                Writing "none" will disable wakeup.
+                Write fails with EINVAL if an invalid protocol combination or
+                unknown protocol name is used, or if wakeup is not supported by
+                the hardware.
+
 What:           /sys/class/rc/rcN/wakeup_filter
 Date:           Jan 2014
 KernelVersion:  3.15
@@ -74,7 +93,7 @@ Description:
                 scancodes which match the filter will wake the system from e.g.
                 suspend to RAM or power off.
                 Otherwise the write will fail with an error.
-                This value may be reset to 0 if the current protocol is altered.
+                This value may be reset to 0 if the wakeup protocol is altered.
 
 What:           /sys/class/rc/rcN/wakeup_filter_mask
 Date:           Jan 2014
@@ -89,4 +108,4 @@ Description:
                 scancodes which match the filter will wake the system from e.g.
                 suspend to RAM or power off.
                 Otherwise the write will fail with an error.
-                This value may be reset to 0 if the current protocol is altered.
+                This value may be reset to 0 if the wakeup protocol is altered.