Re: [PATCHv3 1/4] staging: OMAP4+: thermal: introduce bandgap temperature sensor

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On Thu, Jul 12, 2012 at 05:45:52AM +0300, Valentin, Eduardo wrote:
> Hello,
> 
> On Thu, Jul 12, 2012 at 3:32 AM, Greg Kroah-Hartman
> <gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
> > On Wed, Jul 11, 2012 at 11:41:06PM +0300, Eduardo Valentin wrote:
> >> In the System Control Module, OMAP supplies a voltage reference
> >> and a temperature sensor feature that are gathered in the band
> >> gap voltage and temperature sensor (VBGAPTS) module. The band
> >> gap provides current and voltage reference for its internal
> >> circuits and other analog IP blocks. The analog-to-digital
> >> converter (ADC) produces an output value that is proportional
> >> to the silicon temperature.
> >>
> >> This patch provides a platform driver which expose this feature.
> >> It is moduled as a MFD child of the System Control Module core
> >> MFD driver.
> >>
> >> This driver provides only APIs to access the device properties,
> >> like temperature, thresholds and update rate.
> >>
> >> Signed-off-by: Eduardo Valentin <eduardo.valentin@xxxxxx>
> >> Signed-off-by: J Keerthy <j-keerthy@xxxxxx>
> >
> > This patch gives me the following build error:
> >
> > rivers/staging/omap-thermal/omap-bandgap.c: In function ‘omap_bandgap_build’:
> > drivers/staging/omap-thermal/omap-bandgap.c:805:2: error: implicit declaration of function ‘of_match_device’ [-Werror=implicit-function-declaration]
> > drivers/staging/omap-thermal/omap-bandgap.c:805:8: warning: assignment makes pointer from integer without a cast [enabled by default]
> 
> OK. Those I didn't see while testing on my side. I didn't use
> -Werror=implicit-function-declaration though.

You shouldn't need to do that, just build this driver on your desktop
and you will see the error (hint, do you really want to build this on
x86-64 platforms?)

thanks,

greg k-h
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