From 4e98eb758168ca8f3018ba699ff6236c73841f26 Mon Sep 17 00:00:00 2001 From: Gregory Nutt Date: Wed, 16 Jan 2019 15:04:25 -0600 Subject: [PATCH] include/nuttx/lcd/tda19988.h: Trivial update to some comments. --- include/nuttx/lcd/tda19988.h | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/include/nuttx/lcd/tda19988.h b/include/nuttx/lcd/tda19988.h index 1e35b6d3f3..a9c0c98c2c 100644 --- a/include/nuttx/lcd/tda19988.h +++ b/include/nuttx/lcd/tda19988.h @@ -133,7 +133,16 @@ struct tda19988_lower_s struct tda19988_i2c_s cec; struct tda19988_i2c_s hdmi; - /* Interrupt controls */ + /* Interrupt controls + * + * The interrupt output (open-drain) is used as dual function pin + * selectable through I2C-bus. In calibration mode this pin is used as + * input for 10 ms +/- 1% calibration pulse. In operational mode this pin + * is used to warn the external microprocessor that a special event has + * occurred for HDMI or CEC + * + * REVISIT: The interrupt is not currently used by the upper half driver. + */ CODE int (*attach)(FAR const struct tda19988_lower_s *lower, xcpt_t handler, FAR void *arg);