linux-kernel - Re: [PATCH v4 1/8] arm64: exynos5433: Enable ARMv8 based Exynos5433 (SoC) support

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Date:	Sat, 28 Feb 2015 09:51:14 +0900
From:	Chanwoo Choi <cwchoi00@...il.com>
To:	Chanwoo Choi <cw00.choi@...sung.com>
Cc:	Arnd Bergmann <arnd@...db.de>, Kukjin Kim <kgene@...nel.org>,
	Sylwester Nawrocki <s.nawrocki@...sung.com>,
	Mark Rutland <mark.rutland@....com>,
	Marc Zyngier <marc.zyngier@....com>,
	Olof Johansson <olof@...om.net>,
	"catalin.marinas@....com" <catalin.marinas@....com>,
	"will.deacon@....com" <will.deacon@....com>,
	"inki.dae@...sung.com" <inki.dae@...sung.com>,
	"chanho61.park@...sung.com" <chanho61.park@...sung.com>,
	Seung-Woo Kim <sw0312.kim@...sung.com>,
	"jh80.chung@...sung.com" <jh80.chung@...sung.com>,
	ideal.song@...sung.com, Abhilash Kesavan <a.kesavan@...sung.com>,
	devicetree <devicetree@...r.kernel.org>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	linux-samsung-soc <linux-samsung-soc@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 1/8] arm64: exynos5433: Enable ARMv8 based Exynos5433
 (SoC) support

Hi Kukjin and Sylwester,

On Thu, Feb 26, 2015 at 5:28 PM, Chanwoo Choi <cw00.choi@...sung.com> wrote:
> On 02/24/2015 05:31 PM, Arnd Bergmann wrote:
>> On Tuesday 24 February 2015 14:16:44 Chanwoo Choi wrote:
>>> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
>>> index 1b8e973..d83cea0 100644
>>> --- a/arch/arm64/Kconfig
>>> +++ b/arch/arm64/Kconfig
>>> @@ -154,6 +154,17 @@ config ARCH_EXYNOS
>>>         help
>>>           This enables support for Samsung Exynos SoC family
>>>
>>> +config ARCH_EXYNOS5433
>>> +       bool "ARMv8 based Samsung Exynos5433"
>>> +       select ARCH_EXYNOS
>>> +       select COMMON_CLK_SAMSUNG
>>> +       select HAVE_S3C_RTC if RTC_CLASS
>>> +       select PINCTRL
>>> +       select PINCTRL_EXYNOS
>>> +
>>> +       help
>>> +         This enables support for Samsung Exynos5433 SoC family
>>> +
>>>  config ARCH_EXYNOS7
>>>         bool "ARMv8 based Samsung Exynos7"
>>>         select ARCH_EXYNOS
>>> --
>>>
>>
>> Can we collapse all these entries into one for EXYNOS? I don't
>> want to end up with endless lists like we have on arm32 when
>> there is no platform specific code that is actually controlled
>> by this anway.
>
> I agree.
>
> I check the some issue for only using the CONFIG_ARCH_EXYNOS
> insead of CONFIG_ARCH_EXYNOS7 and CONFIG_ARCH_EXYNOS5433.
>
> Each CONFIG_ARCH_EXYNOS{7|5433} configuraiton was used on following list:
> - CONFIG_ARCH_EXYNOS7
> arch/arm64/boot/dts/exynos/Makefile:1:dtb-$(CONFIG_ARCH_EXYNOS7) += exynos7-espresso.dtb
> drivers/clk/samsung/Makefile:17:obj-$(CONFIG_ARCH_EXYNOS7)      += clk-exynos7.o
> - CONFIG_ARCH_EXYNOS5433
> drivers/clk/samsung/Makefile:13:obj-$(CONFIG_ARCH_EXYNOS5433)   += clk-exynos5433.o
>
> We may can fix it as following by only using 'CONFIG_ARCH_EXYNOS' without any specific configuration.
>
> arch/arm64/boot/dts/exynos/Makefile:1:dtb-$(CONFIG_ARCH_EXYNOS) += exynos7-espresso.dtb
> drivers/clk/samsung/Makefile:17:obj-$(CONFIG_ARCH_EXYNOS)       += clk-exynos7.o clk-exynos5433.o
>
> I think that we need the opinion of Kukjin Kim (Exynos SoC Maintainer)
> and Sylwester Nawrocki(Samsung clock Maintainer)

I need yout opinion about using the CONFIG_ARCH_EXYNOS
instead of CONFIG_ARCH_EXYNOS7/CONFIG_ARCH_EXYNOS5433?

Thanks,
Chanwoo Choi
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