[PATCH v2 0/9] led: introduce LED boot and activity function

[Christian Marangi <ansuelsmth@gmail.com>]

This series is a reworked version of the previous seried: 
misc: introduce STATUS LED activity function

This series port and expand the legacy concept of LED boot from
the legacy Status LED API to new LED API.

One thing that many device need is a way to communicate to the
user that the device is actually doing something.

This is especially useful for recovery steps where an
user (for example) insert an USB drive, keep a button pressed
and the device autorecover.

There is currently no way to signal the user externally that
the bootloader is processing/recoverying aside from setting
a LED on.

A solid LED on is not enough and won't actually signal any
kind of progress.
Solution is the good old blinking LED but uboot doesn't
suggest (and support) interrupts and almost all the LED
are usually GPIO LED that doesn't support HW blink.

Additional Kconfg are also introduced to set the LED boot and
activity. Those are referenced by label.

A documentation for old and these new LED API is created.

(world tested with the azure pipeline)

Changes v2:
- Drop GPIO SW implementation
- Add fix for new LED SW BLINK

Christian Marangi (9):
  led: turn LED ON on initial SW blink
  led: implement led_set_state/period_by_label
  led: implement LED boot API
  common: board_r: rework BOOT LED handling
  led: implement LED activity API
  tftp: implement support for LED activity
  mtd: implement support for LED activity
  ubi: implement support for LED activity
  doc: introduce led.rst documentation

 cmd/mtd.c                  |  19 +++++
 cmd/ubi.c                  |  15 +++-
 common/board_r.c           |  25 ++++++-
 doc/api/index.rst          |   1 +
 doc/api/led.rst            |  10 +++
 drivers/led/Kconfig        |  41 +++++++++++
 drivers/led/led-uclass.c   |  28 ++++++++
 drivers/led/led_sw_blink.c |   5 +-
 include/led.h              | 144 +++++++++++++++++++++++++++++++++++++
 net/tftp.c                 |   7 ++
 10 files changed, 290 insertions(+), 5 deletions(-)
 create mode 100644 doc/api/led.rst

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2.45.2