linux-kernel - Re: [PATCH 0/8] rtc: max77686: Extend driver and add max77802 support

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Date:	Thu, 21 Jan 2016 09:48:20 +0900
From:	Krzysztof Kozlowski <k.kozlowski@...sung.com>
To:	Javier Martinez Canillas <javier@....samsung.com>,
	linux-kernel@...r.kernel.org
Cc:	Kukjin Kim <kgene@...nel.org>, rtc-linux@...glegroups.com,
	Chanwoo Choi <cw00.choi@...sung.com>,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
	Laxman Dewangan <ldewangan@...dia.com>,
	linux-samsung-soc@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
	Olof Johansson <olof@...om.net>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 0/8] rtc: max77686: Extend driver and add max77802 support

On 21.01.2016 02:14, Javier Martinez Canillas wrote:
> Hello,
> 
> On a recent disussion [0] with Krzysztof Kozlowski and Laxman Dewangan,
> we came to the conclusion that the max77686 and max77802 RTC are almost
> the same with only a few differences so there shouldn't be two separate
> drivers and is better to extend max77686 driver and delete rtc-max77802.
> 
> By making the driver more generic, other RTC IP blocks from Maxim PMICs
> could be supported as well like the max77620.
> 
> Patches #1 is just a trivial cleanup.
> 
> Patch #2 allows to support RTCs that need a shorter delay when updating
> the RTC.
> 
> Patch #3 adds a driver data structure to avoid hard-coding parameters
> specific to a certain RTC such as the needed delay and RTC register mask.
> 
> Patch #4 changes the driver to use a mapping table instead of using the
> max77686 registers offsets directly to allow supporting RTC with other
> registers addresses and layout.
> 
> Patch #5 Adds support for max77802 to max77686 RTC driver and patch #6
> removes the old driver since is not needed anymore.
> 
> Finally patch #7 and patch #8 removes the Kconfig symbol from defconfigs.
> 
> I've tested this patch-set on an Exynos5800 Peach Pi Chromebook that has
> a max77802 PMIC and the RTC was working correctly but I don't have a
> machine with max77686 so I will really appreaciate if someone can test
> that no regressions were introduced.
> 

Thanks for the submission. I like the approach. I'll start reviewing the
code and testing it... or maybe I'll wait with testing for v2 because I
already sent some comments. :)

Anyway I will provide later tested-by on max77686.

Best regards,
Krzysztof