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

[Christian Marangi]

On Wed, Jun 05, 2024 at 02:23:21PM -0600, Tom Rini wrote:
> On Wed, Jun 05, 2024 at 09:21:32PM +0200, Christian Marangi wrote:
> 
> > 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.
> 
> Thanks for the work here, this is quite interesting. My only real
> feedback is, can you please rewrite doc/README.LED as doc/api/led.rst
> (and add it to the index), and then document your new functionality
> there as well?
> 

Yes totally, actually my bad for not updating the Documentation.
Honestly I really wanted an early feedback on this for the
implementation. Also I love how it's very easy to add this activity
thing also in other cmd or other task.

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