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Date:	Sun, 20 Jul 2014 14:59:57 +0100
From:	Jonathan Cameron <>
To:	Bartlomiej Zolnierkiewicz <>,
	Naveen Krishna Ch <>
CC:	Sachin Kamat <>,
	Naveen Krishna Chatradhi <>,,
	linux-samsung-soc <>,
	"open list:OPEN FIRMWARE AND..." <>,
	open list <>,
	Chanwoo Choi <>,
	Greg Kroah-Hartman <>,
	Lars-Peter Clausen <>,,
	Grant Grundler <>
Subject: Re: [PATCH 1/4 v2] iio: exyno-adc: use syscon for PMU register access

On 17/07/14 14:56, Bartlomiej Zolnierkiewicz wrote:
> Hi,
> On Thursday, July 17, 2014 05:41:16 PM Naveen Krishna Ch wrote:
>> Hello Sachin,
>> On 17 July 2014 17:24, Sachin Kamat <> wrote:
>>> Hi Naveen,
>>> On Thu, Jul 17, 2014 at 4:49 PM, Naveen Krishna Chatradhi
>>> <> 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 <>
>>>> To:
>>> 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).
A very good point.  How to avoid this breakage?  Supporting the whole
old mechanism is going to be a little painful but without that phandle
is there any other way?
> Best regards,
> --
> Bartlomiej Zolnierkiewicz
> Samsung R&D Institute Poland
> Samsung Electronics
> --
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