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

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Message-ID: <20151028094853.GM22331@piout.net>
Date:	Wed, 28 Oct 2015 10:48:53 +0100
From:	Alexandre Belloni <alexandre.belloni@...e-electrons.com>
To:	Krzysztof Kozlowski <k.kozlowski@...sung.com>
Cc:	Alim Akhtar <alim.akhtar@...sung.com>,
	Mark Brown <broonie@...nel.org>, 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: [rtc-linux] Re: [PATCH v3 5/5] drivers/rtc/rtc-s5m.c: add
 support for S2MPS15 RTC

On 28/10/2015 at 12:31:43 +0900, Krzysztof Kozlowski wrote :
> The s2mps13 clock driver added new name and compatible... which was
> probably totally unneeded (I missed that during review). We don't have
> to make this as a rule...
> 
> Since we do not have any data about future workarounds and the
> differences then just follow Ockham's razor - use the same name and
> compatible.
> 

So you don't care about DT backward compatibility because when a
workaround will be needed for one of the IPs, then you will have to
update the old dtb to use it.

Unless you are sure that the IP is the same, doing

{ "s2mps15-rtc",	S2MPS14X },

is probably the best way to handle that. Note that I personally don't
care about the DT ABI, I'm just pointing out what may happen ;)

-- 
Alexandre Belloni, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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