linux-kernel - Re: [GIT PULL 3/7] drivers: soc: EXYNOS drivers for v4.6

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Message-id: <56CE4E14.2050701@samsung.com>
Date:	Thu, 25 Feb 2016 09:43:00 +0900
From:	Krzysztof Kozlowski <k.kozlowski@...sung.com>
To:	Olof Johansson <olof@...om.net>
Cc:	Arnd Bergmann <arnd@...db.de>, Kevin Hilman <khilman@...nel.org>,
	arm@...nel.org, Kukjin Kim <kgene@...nel.org>,
	linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
	Pankaj Dubey <pankaj.dubey@...sung.com>,
	Pavel Fedin <p.fedin@...sung.com>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	Javier Martinez Canillas <javier@....samsung.com>
Subject: Re: [GIT PULL 3/7] drivers: soc: EXYNOS drivers for v4.6

On 25.02.2016 07:22, Olof Johansson wrote:
> On Mon, Feb 15, 2016 at 09:34:02AM +0900, Krzysztof Kozlowski wrote:
>> Hi Arnd, Kevin and Olof,
>>
>> This finally moves SROM controller and PMU code to separate
>> driver under drivers/soc/samsung.
>>
>> Kind regards,
>> Krzysztof
>>
>>
>> The following changes since commit 92e963f50fc74041b5e9e744c330dca48e04f08d:
>>
>>   Linux 4.5-rc1 (2016-01-24 13:06:47 -0800)
>>
>> are available in the git repository at:
>>
>>   git://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux.git tags/samsung-drivers-soc-srom-pmu-4.6
>>
>> for you to fetch changes up to 74a6659e8bf193066ba6bf365de66baa897aebb1:
>>
>>   drivers: soc: Add support for Exynos PMU driver (2016-01-25 10:46:59 +0900)
>>
>> ----------------------------------------------------------------
>> A set of changes adding new drivers under drivers/soc/samsung:
>>
>> 1. Split code for handling SROM registers out of arm/mach-exynos
>>    in to separate SROM controller driver under drivers/soc/samsung.
>>    The driver will save and restore SROM registers during Suspend
>>    to RAM.
>>
>> 2. Add to this SROM controller driver support for bank configuration
>>    used by child devices. This allows usage of SMSC9115 Ethernet chip
>>    on SMDK5410 (Exynos5410) directly connected to SROM controller.
> 
> Hi,
> 
> OMAP has GPMC drivers under drivers/memory. I wonder if SROM should go there
> too, since it's a quite similar bus.

I wish I get this feedback before, when we were discussing the SROM
patches. :/

Indeed this sounds reasonable. On some boards the omap-gpmc is used for
the same purpose: interfacing to smsc,lan9115 (like on SMDK5410).


> Feel free to respin this without SROM now, so we can get the other pieces in
> sooner and then revisit the SROM asyncronously. That'll remove the dependencies
> on DT as well.

Okay, I'll rebase all drivers/soc branches and respin the pull request
so PMU driver and other stuff could go in.

BTW, just in case, although PMU stands for "Power Management Unit" I
don't think it should be placed under drivers/power because it is not a
avs/charger/battery/reset driver. Existing power-related drivers are
under driver/soc (bcm, dove, tegra).

Re-work of SROM drivers could be started on top of it.

Best regards,
Krzysztof