linux-kernel - Re: [PATCH 1/5] rtc: s5m: Fix register updating by adding regmap for RTC

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Date:	Tue, 26 Nov 2013 15:26:12 +0100
From:	Krzysztof Kozlowski <k.kozlowski@...sung.com>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:	Sangbeom Kim <sbkim73@...sung.com>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Lee Jones <lee.jones@...aro.org>,
	Alessandro Zummo <a.zummo@...ertech.it>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	rtc-linux@...glegroups.com,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Kyungmin Park <kyungmin.park@...sung.com>
Subject: Re: [PATCH 1/5] rtc: s5m: Fix register updating by adding regmap for
 RTC

On Tue, 2013-11-26 at 15:07 +0100, Geert Uytterhoeven wrote:
> On Tue, Nov 26, 2013 at 2:50 PM, Krzysztof Kozlowski
> <k.kozlowski@...sung.com> wrote:
> > On S5M8767A registers were not properly updated and read due to usage of
> > the same regmap as the PMIC. This could be observed in various hangs,
> > e.g. in infinite loop during waiting for UDR field change.
> >
> > On this chip family the RTC has different I2C address than PMIC so
> > additional regmap is needed.
> >
> > Signed-off-by: Krzysztof Kozlowski <k.kozlowski@...sung.com>
> > Signed-off-by: Kyungmin Park <kyungmin.park@...sung.com>
> > ---
> >  drivers/mfd/sec-core.c           |   14 ++++++++++++++
> >  drivers/rtc/rtc-s5m.c            |    2 +-
> >  include/linux/mfd/samsung/core.h |    1 +
> >  3 files changed, 16 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/mfd/sec-core.c b/drivers/mfd/sec-core.c
> > index 34c18fb..a1a413a 100644
> > --- a/drivers/mfd/sec-core.c
> > +++ b/drivers/mfd/sec-core.c
> > @@ -166,6 +166,11 @@ static struct regmap_config s5m8767_regmap_config = {
> >         .cache_type = REGCACHE_FLAT,
> >  };
> >
> > +static struct regmap_config sec_rtc_regmap_config = {
> 
> const please

Sure.

> > --- a/include/linux/mfd/samsung/core.h
> > +++ b/include/linux/mfd/samsung/core.h
> > @@ -40,6 +40,7 @@ struct sec_pmic_dev {
> >         struct device *dev;
> >         struct sec_platform_data *pdata;
> >         struct regmap *regmap;
> > +       struct regmap *regmap_rtc;
> 
> Do you think it makes sense to rename the plain "regmap" to "regmap_pmic"?

Yes, I think it would make the code more readable. I'll change it.

Best regards,
Krzysztof

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