linux-kernel - Re: [PATCH] input: cpcap-pwrbutton: new driver

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Message-ID: <20170228023213.GR21809@atomide.com>
Date:   Mon, 27 Feb 2017 18:32:13 -0800
From:   Tony Lindgren <tony@...mide.com>
To:     Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:     Sebastian Reichel <sre@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        linux-input@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] input: cpcap-pwrbutton: new driver

* Tony Lindgren <tony@...mide.com> [170225 11:21]:
> * Dmitry Torokhov <dmitry.torokhov@...il.com> [170225 11:00]:
> > On Fri, Feb 24, 2017 at 09:59:09AM +0100, Sebastian Reichel wrote:
> > > +#include <linux/mfd/motorola-cpcap.h>
> > > +
> > > +#define CPCAP_IRQ_ON 23
> > > +#define CPCAP_IRQ_ON_BITMASK (1 << (CPCAP_IRQ_ON % 16))
> > 
> > Is this truly static or it could depend= on IRQ returned by
> > platform_get_irq()?
> 
> I suggest we add it to include/linux/mfd/motorola-cpcap.h:
> 
> static inline int cpcap_get_irq_status(struct device *dev,
> 				       struct regmap *regmap,
> 				       int irq,
> 				       u16 *status);
> 
> Or do you guys have better ideas?

Actually after thinking about it, a macro like Sebastian has
is probably better. Otherwise the interface will be confusing
unless we limit it to getting just one bit instead of the whole
bank. So I now suggest let's just keep it in Sebastian's driver,
then we can move it later as it's just a one line.

Regards,

Tony