From: Bruce Fortnam <bfortnam@GlobalLocate.com> - 2006-10-13 17:27:24
On 10/13/06, Dave Hylands wrote:
> I stumbled across this today, and since this particular topic came up
recently on the list, I figured it was worth posting.
> The article is titled:
> SPST pushbutton switch combines power-control, user-input functions
> HTML version of the article:
> PDF version of the article:
> In order to be useful, it would require some changes in u-boot (in
order to assert the P1.1 (aka Power Hold) signal,
> although this could also be done using bootcmd commands as well.
The LTC2954 from Linear Tech performs essentially the same function
without requiring the Power Hold signal from the CPU:
Once it turns on, it stays on until it gets a kill signal from the CPU
or you hold the button down for a long time.