[PATCH 0/7] misc: introduce STATUS LED activity function

[Christian Marangi]

This series expand the STATUS LED framework with a new color
and a big new feature. 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.

To fix this and handle the problem of device not supporting
HW blink, expand the STATUS LED framework with new API.

We introduce a new config LED_STATUS_ACTIVITY, that similar
to the RED, GREEN and others, takes the LED ID set in
the LED_STATUS config and is used as the global LED for activity
operations.

We add status_led_activity() that simulate software blink.
Any function that signal activity will call this function.
At each call a counter is increased. When the counter reach
the freq value, the LED is toggled simulating a blink and
the counter is zeroed. When the counter reach the freq value
again, the LED is toggled again and so on...

Call to this function is added to the usual operation for
recovery. Currently added to tftp traffic and mtd spi and
nand write and erase operation.

This also contains a big fixup for the gpio_led driver that
currently deviates from the Documentation and make the
coloured status led feature unusable.

Christian Marangi (7):
  misc: gpio_led: fix broken coloured LED status functions
  led: status_led: add support for white LED colour
  led: status_led: add function to toggle a status LED
  led: status_led: add new activity LED config and functions
  tftp: implement support for LED status activity
  mtd: implement support for LED status activity
  ubi: implement support for LED status activity

 cmd/legacy_led.c               |  6 ++++
 cmd/mtd.c                      | 23 +++++++++++++++
 cmd/ubi.c                      | 17 ++++++++++-
 common/board_f.c               |  2 ++
 drivers/led/Kconfig            | 29 +++++++++++++++++++
 drivers/misc/gpio_led.c        | 41 +++++++++++++++++++-------
 drivers/misc/status_led.c      | 53 +++++++++++++++++++++++++++-------
 drivers/mtd/nand/core.c        |  4 +++
 drivers/mtd/nand/spi/core.c    |  5 ++++
 drivers/mtd/spi/spi-nor-core.c |  9 ++++++
 include/status_led.h           |  6 ++++
 net/tftp.c                     | 16 ++++++++++
 12 files changed, 189 insertions(+), 22 deletions(-)

-- 
2.43.0