linux-kernel - Re: [PATCH 2/3] iio: imu: mpu6050: add support for regulator framework

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Message-ID: <20180711103129.ql4txni63i2m7m4r@d08157822050>
Date:   Wed, 11 Jul 2018 06:31:29 -0400
From:   Brian Masney <masneyb@...tation.org>
To:     Himanshu Jha <himanshujha199640@...il.com>
Cc:     jic23@...nel.org, robh+dt@...nel.org, mark.rutland@....com,
        andy.gross@...aro.org, david.brown@...aro.org,
        linux-iio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-soc@...r.kernel.org, jonathan@...ek.ca,
        jmaneyrol@...ensense.com, knaack.h@....de, lars@...afoo.de,
        pmeerw@...erw.net, mkelly@...o.com, fischerdouglasc@...il.com,
        bshah@....org, ctatlor97@...il.com
Subject: Re: [PATCH 2/3] iio: imu: mpu6050: add support for regulator
 framework

On Wed, Jul 11, 2018 at 03:34:43PM +0530, Himanshu Jha wrote:
> Hi Brain,
> 
> On Tue, Jul 10, 2018 at 09:09:31PM -0400, Brian Masney wrote:
> > This patch adds support for the regulator framework to the mpu6050
> > driver.
> > 
> > Signed-off-by: Brian Masney <masneyb@...tation.org>
> > Signed-off-by: Jonathan Marek <jonathan@...ek.ca>
> > ---
> >  }
> >  EXPORT_SYMBOL_GPL(inv_mpu_core_probe);
> >  
> > +int inv_mpu_core_remove(struct inv_mpu6050_state *st)
> > +{
> > +	return regulator_disable(st->vddio_supply);
> > +}
> EXPORT_SYMBOL_GPL(inv_mpu_core_remove); ?
> 
> This is causing 0-day test build failure perhaps.

You are right. It compiles if I have CONFIG_INV_MPU6050_IIO built into
the kernel, which is what I'm using to boot the board, but fails when
compiled as a module. Good catch 0-day!

The patch won't apply to Linus's current master branch and I assumed
that iio/togreg didn't have the required changes as well. Sorry about
the noise.

I'll send a v2 before the weekend.

Brian