linux-kernel - Re: [PATCH v3 5/5] drivers/rtc/rtc-s5m.c: add support for S2MPS15 RTC

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Date:	Wed, 28 Oct 2015 11:17:56 +0900
From:	Krzysztof Kozlowski <k.kozlowski@...sung.com>
To:	Mark Brown <broonie@...nel.org>
Cc:	Alim Akhtar <alim.akhtar@...sung.com>, lee.jones@...aro.org,
	mturquette@...libre.com, linux-samsung-soc@...r.kernel.org,
	linux-clk@...r.kernel.org, rtc-linux@...glegroups.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 5/5] drivers/rtc/rtc-s5m.c: add support for S2MPS15 RTC

On 28.10.2015 10:53, Mark Brown wrote:
> On Wed, Oct 28, 2015 at 10:29:56AM +0900, Krzysztof Kozlowski wrote:
> 
>> If that's true, then don't add new compatibles, new names etc. Re-use.
>> No new code needed, no changes needed. Keep it simple.
> 
> Well, it depends - it can be useful to get the information about it
> being a different part into DT so that if in future we realise that
> there is some difference (perhaps a bug workaround even if the IP is
> intended to be the same).  Though in the case of a MFD that information
> can be obtained from the MFD for the device.

We can always differentiate later and introduce new compatible.
Declaring a compatible right now would be useful only if we really cared
about using the workaround on older DTBs.

Since I cannot judge the difference (I don't have the datasheet of
S2MPS15) then I don't see the need of adding new compatible/name for the
"same device".

Of course maybe there is such need? Alim?

Best regards,
Krzysztof
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