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SubjectRe: pcf8591 boot time parameters
Karel Kulhavy wrote:
> Is it possible to configure pcf8591 driver using boot time commandline
> parameters?
>
> If yes, where are they described? I didn't find it. (<Help> doesn't say
> anything). also /linux-2.6.10/Documentation/i2c$ fgrep PCF * didn't reveal
> anything related.
>
> I only found documentation for module parameters by means of modinfo pcf8591

and what did it tell you? I see (when built as a loadable module,\
but they are still valid when built in-kernel):

parm: force:List of adapter,address pairs to boldly assume
to be present
parm: force_pcf8591:List of adapter,address pairs which are
unquestionably assumed to contain a `pcf8591' chip
parm: probe:List of adapter,address pairs to scan additionally
parm: ignore:List of adapter,address pairs not to scan
parm: input_mode:Analog input mode:
0 = four single ended inputs
1 = three differential inputs
2 = single ended and differential mixed
3 = two differential inputs


It seems that there is a list of i2c client parameters in
Documentation/i2c/writing-clients .

I don't know i2c, but any driver that #includes
linux/i2c.h has defined for it these parameters:
probe, probe_range
ignore, ignore_range
force

and any driver that #includes linux/i2c-sensor.h
has defined for it these parameters:
force_<driver_basename>
probe
ignore
force

but it would be better for someone who is familiar with those
twisted macros to document all of this.

--
~Randy
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