The following patch set adds the possibility to change the tty trigger modes. Until now, the LED is flashed when data is transmitted. With a legacy serial interface there are additional signal lines. If this line changes then the LED is turned on/off. CTS: Clear To Send -> DCE is ready to accept data from the DTE DSR: Data Set Ready -> DCE is ready to receive and send data. CAR: Data Carrier Detect -> DCE is receiving a carrier from a remote DCE. RNG: Ring Indicator -> DCE has detected an incoming ring on the line. Florian Eckert (2): tty: new helper function tty_get_mget leds: trigger: ledtrig-tty: add additional modes .../ABI/testing/sysfs-class-led-trigger-tty | 16 ++ drivers/leds/trigger/ledtrig-tty.c | 148 ++++++++++++++++-- drivers/tty/tty_io.c | 32 +++- include/linux/tty.h | 3 +- 4 files changed, 176 insertions(+), 23 deletions(-) -- 2.30.2
