[Arm-netbook] [advice sought] EOMA68 kernel support

Baybal Ni nikulinpi at gmail.com
Sat Mar 10 20:44:11 GMT 2012

I think good first step would be just to submit all drivers for
hardware that will we will use on I2C

On 10 March 2012 12:20, lkcl luke <luke.leighton at gmail.com> wrote:
> On Sat, Mar 10, 2012 at 7:51 PM, Alan Cox <alan at lxorguk.ukuu.org.uk> wrote:
>>>  of particular concern is that a CPU card could be running on (small!)
>>> backup battery / supercapacitor whilst being hot-swapped, and thus
>>> that means that the LCD module (drivers/eoma68/lcd.ko?) would need to
>>> be loaded and unloaded from userspace (udev).  that's not going to be
>>> a problem, is it?  i may just be imagining skeletons in the closet,
>>> here.
>> Your device tree describes devices. Your bus creates them when you
>> hotplug and it removes them when you hot unplug. The rest is the drivers
>> problem to behave properly, and refcount right.
>>>  * it's the purposes to which the 16 GPIOs can be put that will be
>>> radically different from one I/O board to the next.  GPIO 0 could be
>>> "powerup for WIFI" on one I/O board, but "lid open/shut switch" on
>>> another.
>> It's "GPIO 0 of card X" and providing you remember that, watch your
>> refcounting and don't remap a new device over the address space of an old
>> one during a hotplug you should be fine.
>  allright.  thanks alan.  that's clear.
> honest opinion sought: is this something that would keep a (good) gsoc
> student occupied full-time?  you or i could complete it in a week, 2
> weeks, whatever, but i'm concerned that a gsoc student would go "um is
> that it??"
> yes we'll have by then one or two reference platforms, but that's not
> going to be rocket science to get the device drivers for them
> up-and-running [non-eoma-compliant].
> i guess i'm talking myself out of the proposal, am looking for advocates :)
> l.
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