linux-kernel - Re: [PATCH 1/4 v2] iio: exyno-adc: use syscon for PMU register access

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Message-id: <4202302.OdUuvHROuH@amdc1032>
Date:	Thu, 17 Jul 2014 15:56:55 +0200
From:	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
To:	Naveen Krishna Ch <naveenkrishna.ch@...il.com>
Cc:	Sachin Kamat <spk.linux@...il.com>,
	Naveen Krishna Chatradhi <ch.naveen@...sung.com>,
	linux-iio@...r.kernel.org,
	linux-samsung-soc <linux-samsung-soc@...r.kernel.org>,
	"open list:OPEN FIRMWARE AND..." <devicetree@...r.kernel.org>,
	open list <linux-kernel@...r.kernel.org>,
	Chanwoo Choi <cw00.choi@...sung.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Lars-Peter Clausen <lars@...afoo.de>, cpgs@...sung.com,
	Grant Grundler <grundler@...omium.org>, jic23@...nel.org
Subject: Re: [PATCH 1/4 v2] iio: exyno-adc: use syscon for PMU register access


Hi,

On Thursday, July 17, 2014 05:41:16 PM Naveen Krishna Ch wrote:
> Hello Sachin,
> 
> On 17 July 2014 17:24, Sachin Kamat <spk.linux@...il.com> wrote:
> > Hi Naveen,
> >
> > On Thu, Jul 17, 2014 at 4:49 PM, Naveen Krishna Chatradhi
> > <ch.naveen@...sung.com> wrote:
> >> This patch updates the IIO based ADC driver to use syscon and regmap
> >> APIs to access and use PMU registers instead of remapping the PMU
> >> registers in the driver.
> >>
> >> Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@...sung.com>
> >> To: linux-iio@...r.kernel.org
> >
> > With only this patch applied, I believe the ADC functionality would be broken.
> > Perhaps the DT changes should be merged along with this patch?
> 
> Jonathan already mentioned that, he would wait for Ack from Kukjin.
> With out the dts changes ADC driver will fail to probe but it wont
> crash the system.
> git bisect should still work.

Unless someone bisects things related to ADC functionality..

Also patch #1 seems to break device tree ABI (the old dtb will no longer
work with the new kernel).

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics

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