linux-kernel - Re: [PATCH v4 2/5] mfd: mp2629: Add support for mps battery charger

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Message-ID: <20200327112523.GC3383@dell>
Date:   Fri, 27 Mar 2020 11:25:23 +0000
From:   Lee Jones <lee.jones@...aro.org>
To:     saravanan sekar <sravanhome@...il.com>
Cc:     robh+dt@...nel.org, jic23@...nel.org, knaack.h@....de,
        lars@...afoo.de, pmeerw@...erw.net, sre@...nel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-iio@...r.kernel.org, linux-pm@...r.kernel.org
Subject: Re: [PATCH v4 2/5] mfd: mp2629: Add support for mps battery charger

On Fri, 27 Mar 2020, saravanan sekar wrote:
> On 27/03/20 11:22 am, Lee Jones wrote:
> > Saravanan, Jonathan,
> > 
> > On Fri, 27 Mar 2020, saravanan sekar wrote:
> > > On 27/03/20 8:55 am, Lee Jones wrote:
> > > > On Sun, 22 Mar 2020, Saravanan Sekar wrote:
> > > > 
> > > > > mp2629 is a highly-integrated switching-mode battery charge management
> > > > > device for single-cell Li-ion or Li-polymer battery.
> > > > > 
> > > > > Add MFD core enables chip access for ADC driver for battery readings,
> > > > > and a power supply battery-charger driver
> > > > > 
> > > > > Signed-off-by: Saravanan Sekar <sravanhome@...il.com>
> > > > > ---
> > > > >    drivers/mfd/Kconfig        |   9 +++
> > > > >    drivers/mfd/Makefile       |   2 +
> > > > >    drivers/mfd/mp2629.c       | 116 +++++++++++++++++++++++++++++++++++++
> > > > >    include/linux/mfd/mp2629.h |  22 +++++++
> > > > >    4 files changed, 149 insertions(+)
> > > > >    create mode 100644 drivers/mfd/mp2629.c
> > > > >    create mode 100644 include/linux/mfd/mp2629.h

[...]

> > > > > +#ifndef __MP2629_H__
> > > > > +#define __MP2629_H__
> > > > > +
> > > > > +#include <linux/types.h>
> > > > > +
> > > > > +struct device;
> > > > > +struct regmap;
> > > > Why not just add the includes?
> > > Some more shared enum added in ADC driver
> > Sorry?
> 
> I misunderstood your previous question that you are asking to remove this
> mp2629.h file
> 
> "No user here. (Hint: Use forward declaration of struct device instead)" -
> review comments on V1 from Andy Shevchenko.
> So remove the includes

So Andy has reviewed, but you still don't have him on Cc?

How are we meant to continue the discussion?

As a general rule I'm not a fan of forward declarations.

I think they should be avoided if at all possible.

> > > > > +struct mp2629_info {
> > > > > +	struct device *dev;
> > > > > +	struct regmap *regmap;
> > > > > +};
> > > > > +
> > > > > +#endif

-- 
Lee Jones [李琼斯]
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
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