Messages in this thread | | | Date | Thu, 30 Dec 2004 21:21:09 -0800 | From | "Randy.Dunlap" <> | Subject | Re: pcf8591 boot time parameters |
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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.
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