--- In "Charles" <> wrote:
>
>
> Hi --
> --- In "j.chitte" <j.chitte@> wrote:
> >
> > Hi,
> >
> > I'm working on using the lastest matt patchset linux-2.6.32.3-ts7200_matt-4
> > http://mcrapet.free.fr/
> >
> > The doc states that the max197 is now mainline and he has dropped this 197
> > patch. But I can't find it when doing menuconfig.
>
> It is not in mainline, AFAIK. (In menuconfig, type '/', and enter text to
> search for.... I found that very useful when I discovered it). Nor did I
> find any mention of it on the linux arm kernel ML.
>
> Matt dropped the max197 patch from his patchset, but it should be a simple
> matter to add it back in again if you need it. Not sure why he dropped it.
>
> There is also a device driver for the max197 in the files section of this
> group, if you need more speed.
>
> regards, ...... Charlie
>
> >
> > Maybe I need to enable something else first to see it.
> >
> > Anyone point me in the right direction>
> >
> > TIA/
> >
>
Thanks,
He says he dropped it because it is now in mainline. The change log documents
the feature but I can't find out how to enable it.
http://mcrapet.free.fr/linux-2.6.32.3-ts7200_matt-4.txt
- Max197 option (platform driver)
# MAX197 option. 8 (12-bit) ADC channels (module named ts72xx_max197)
$ cd /sys/devices/platform/ts72xx-max197
$ cat ch1
0.000
For configuring range input:
$ echo 5 >ch2 // range 0..5V (this is the default)
$ echo 10 >ch3 // range 0..10V
$ echo -5 >ch4 // range -5..5V
$ echo -10 >ch5 // range -10..10V
If average option is compiled:
$ cd /sys/module/ts72xx_max197/parameters
$ cat average
1
$ echo 2 >average // two samples are acquired foa one request
The old config option (still in his example configs) gets filtered out my make
menuconfig and grepping .config for TS or MAX does not show anything relevant.
The search feature is very useful, thanks for the cheat code ;)
But similarly nothing relevant shows up for 197.
Maybe matt pre-empted it getting into mainline. I'll see if his older patch
still works.
I'm already getting about 24kS/s from userland code now I'm on eabi, which is
starting to get interesting. I think with the kernel driver I should be able to
get closer to the MAX spec of 100kS/s
That is starting to get interesting.
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