linux-kernel - Re: [PATCH 1/2] clk: samsung: Don't build ARMv8 clock drivers on ARMv7

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Date:	Thu, 19 Nov 2015 18:41:16 +0900
From:	Krzysztof Kozlowski <k.kozlowski@...sung.com>
To:	Tomasz Figa <tomasz.figa@...il.com>
Cc:	k.kozlowski.k@...il.com,
	Sylwester Nawrocki <s.nawrocki@...sung.com>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...eaurora.org>,
	"linux-samsung-soc@...r.kernel.org" 
	<linux-samsung-soc@...r.kernel.org>, linux-clk@...r.kernel.org,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>,
	Kukjin Kim <kgene@...nel.org>, Olof Johansson <olof@...om.net>,
	Arnd Bergmann <arnd@...db.de>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	Kevin Hilman <khilman@...aro.org>,
	Pankaj Dubey <pankaj.dubey@...sung.com>
Subject: Re: [PATCH 1/2] clk: samsung: Don't build ARMv8 clock drivers on
 ARMv7

W dniu 19.11.2015 o 18:16, Tomasz Figa pisze:
> 2015-11-19 13:51 GMT+09:00 Krzysztof Kozlowski <k.kozlowski@...sung.com>:
>> On 19.11.2015 13:18, Tomasz Figa wrote:
>>> However, I don't think we can disable compilation of particular 64-bit
>>> SoCs, so maybe there isn't much sense in splitting their clock drivers
>>> into separate symbols?
>>
>> To me it does not really matter. Indeed as you said one cannot disable
>> building of one particular Exynos SoCs.
>>
>> However we could still want not build some parts of such SoCs (like
>> clock, pinctrl etc). I don't see much benefit for such case except when
>> someone would like to drastically reduce the size of kernel image (for
>> whatever reasons he has.).
> 
> Can we really build a kernel that support selected Exynos SoC without
> its clock driver? Actually I don't think we even allow deselecting
> clock drivers currently, because they are not visible in menuconfig.
> Unless there is a clear goal to separate ARCH level Kconfig symbol for
> particular ARM64-based Exynos SoCs, I don't think it makes any sense
> to keep the clock-related symbols separate.

That is reasonable and very convincing. I'll wait for Sylwester reply
before re-spinning.

BR,
Krzysztof
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