On Wed, 13 Mar 2013 15:04:38 +0000, BrunoFerreira wrote:
I'm currently working with a new board iEi NOVA-PV-D5251 [1] that
have the Fintek F81865 chip for Super I/O support and I will need to
develop the watchdog driver and another to access to the IO that this
board supports (gpio). I made a search and I see that already exists
a
driver for F71808E chip, I use this driver as an example an I made a
new driver for F81865 chip. My driver is working pretty well, but
I've
a question that I can't find the answer on datasheet of this chip
that
may be Wim or Giel could know.
On both chips, we need to configure a pin that can work as a normal
GPIO (F81865: Set pin 70 the function of WDTRST#/GPIO15 is WDTRST# |
F71808E: Set pin 21 to GPIO23/WDTRST#, then to WDTRST#), this is here
where I get myself confused, this WDTRST will be mapped in any GPIO
output on my board? I mean, if the watchdog is enable I will get any
output pin set to 1 (i.e. the GPIO15, output 5?) and when the
watchdog
goes down this output goes to 0?
Sorry, I can't give you a definite answer on that. All Fintek
datasheets I've seen are very poorly written. At one point I actually
stopped trusting the datasheet enough to go through the hassle of
hooking up a scope to the pins of the chip.
Hazarding a guess however, I'd say that when the watchdog is enabled
you cannot use the WDTRST pin as a GPIO pin.
The other question is to Wim, can you tell me if there is interest in
add this chip support to kernel?
This would be a yes, unless there are good reasons not to include it in
mainline.
--
Giel
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