[media] rc: nuvoton-cir: Add support for writing wakeup samples via sysfs filter callback

Nuvoton-cir utilizes the encoding capabilities of rc-core to convert
scancodes from user space to pulse/space format understood by the
underlying hardware.

Converted samples are then written to the wakeup fifo along with other
necessary configuration to enable wake up functionality.

Signed-off-by: Antti Seppälä <a.seppala@gmail.com>
Signed-off-by: James Hogan <james@albanarts.com>
Cc: Jarod Wilson <jarod@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/media/rc-core.h b/include/media/rc-core.h
index 9ae433c7f14b..f1cb9daba489 100644
--- a/include/media/rc-core.h
+++ b/include/media/rc-core.h
@@ -246,6 +246,7 @@ static inline void init_ir_raw_event(struct ir_raw_event *ev)
 #define US_TO_NS(usec)          ((usec) * 1000)
 #define MS_TO_US(msec)          ((msec) * 1000)
 #define MS_TO_NS(msec)          ((msec) * 1000 * 1000)
+#define NS_TO_US(nsec)          DIV_ROUND_UP(nsec, 1000L)
 
 void ir_raw_event_handle(struct rc_dev *dev);
 int ir_raw_event_store(struct rc_dev *dev, struct ir_raw_event *ev);