[v8,0/3] leds: ledtrig-tty: add tty_led_mode xtension

Hello,

here commes v8 of this series to add additional tty_led_modes.

v8:
Changes compared to the v7 patchset with
20230222083335.847655-1-fe@dev.tdt.de are.

* Update 'Documentation/ABI/testing/sysfs-class-led-trigger-tty'
  with the suggested changes.
* Use a meaningfull name for the Rx/Tx enum.
* Do not use C++ comments style

Add a new patch 'ledtrig-tty-fix-brightness-set' to fix an issue with
LEDs that are connected via GPIOs to the SOC with the device driver
'leds-gpio'. In my view, the wrong function is being used here. LEDs
that do not need and do not have a delayed call do not work with the
current implementation. Therefore, the 'led_set_brightness_nosleep'
function must be used.


v7:
Changes compared to the v5 patchset with
20230222075539.484878-1-fe@dev.tdt.de are.

Addressed review comments by Jiri Slaby are:

Thanks for the hint with the command 'make htmldocs SPHINXDIRS="admin-guide"'.
Unfortunately, I did not know that. I have now verified it also in the
browser. In my opinion, the list is now also displayed correctly in
the documentation.


v6:
Changes compared to the v5 patchset with
20230221081901.15557-1-fe@dev.tdt.de are.

Addressed review comments by kernel test robot are:

* fix Documentation/ABI/testing/sysfs-class-led-trigger-tty:9:
  WARNING: Unexpected indentation.
* fix Documentation/ABI/testing/sysfs-class-led-trigger-tty:9:
  WARNING: Block quote ends without a blank line; unexpected unindent.

Thanks to Jiri Slaby, who gave me the crucial hint of what I need to fix,
to possibly make the 'Kernel test robot' happy.


v5:
Changes compared to the v4 patchset with
20230220152038.3877596-1-fe@dev.tdt.de are.

Sorry for the inconvenience, but I sent the wrong patch for
ledtrig-tty.c in v4. The v5 patchset now includes all the changes I
specified in the v4 patchset.


v4:
Changes compared to the v3 patchset with
20230220093739.320478-1-fe@dev.tdt.de are.

Addressed review comments by Jiri Slaby are:

ledtrig-tty.c:
- Do not use __TTY_LED_MAX pattern us instead __TTY_LED_LAST = TTY_LED_RNG
- Move declartion and assignment into one singel line
- Use __TTY_LED_LAST pattern, to simplify tty_mode_show and
  tty_mode_store handling


v3:
Changes compared to the v2 patchset with
20230217094403.1574468-1-fe@dev.tdt.de are.

Addressed review comments by Greg K-H are:

tty.h:
- Fix first comment line and remark -%ENOTTY for the new function
  'tty_get_mget' to make a proper kernel doc.
- Add the return value -%ENOTTY again, I thought it was no longer needed.


v2:
Changes compared to the initial patchset with
20230213140638.620206-1-fe@dev.tdt.de are.

Addressed review comments by Jiri Slaby are:

tty.h:
- Fix compilation error because of wrong rebaseing
- Remove empty lines
- Use new 'tty_get_mget' in 'tty_tiocmget'

ledtrig-tty.c:
- Update commit description
- Use enum for tty_led_mod in struct ledtrig_tty_date
- Rename sysfs file from 'mode' to 'tty_led_mode'
- Change tty_led_mode show function to use loop instead of switch/case
- Change tty_led_mode store function to use loop instead of switch/case
- Check return value of function tty_get_mget

Florian Eckert (3):
  tty: new helper function tty_get_mget
  trigger: ledtrig-tty: add additional modes
  ledtrig-tty: call correct brightness set function

 .../ABI/testing/sysfs-class-led-trigger-tty   |  18 +++
 drivers/leds/trigger/ledtrig-tty.c            | 145 ++++++++++++++++--
 drivers/tty/tty_io.c                          |  28 +++-
 include/linux/tty.h                           |   1 +
 4 files changed, 171 insertions(+), 21 deletions(-)