linux-kernel - Re: [PATCH 11/19] clk: samsung: exynos5433: Add clocks for CMU

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Message-id: <54771173.6090408@samsung.com>
Date:	Thu, 27 Nov 2014 20:56:35 +0900
From:	Chanwoo Choi <cw00.choi@...sung.com>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
	kgene.kim@...sung.com, mark.rutland@....com, olof@...om.net,
	catalin.marinas@....com, will.deacon@....com,
	s.nawrocki@...sung.com, tomasz.figa@...il.com,
	thomas.abraham@...aro.org, linus.walleij@...aro.org,
	kyungmin.park@...sung.com, inki.dae@...sung.com,
	chanho61.park@...sung.com, geunsik.lim@...sung.com,
	sw0312.kim@...sung.com, jh80.chung@...sung.com,
	a.kesavan@...sung.com, devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 11/19] clk: samsung: exynos5433: Add clocks for
 CMU_BUS{0|1|2} domains

Dear Arnd,

On 11/27/2014 08:41 PM, Arnd Bergmann wrote:
> On Thursday 27 November 2014 16:35:08 Chanwoo Choi wrote:
>> +  - "samsung,exynos5433-cmu-bus0", "samsung,exynos5433-cmu-bus1"
>> +    and "samsung,exynos5433-cmu-bus2" - clock controller compatible for CMU_BUS
>> +    which generates global data buses clock and global peripheral buses clock.
>>  
>>  - reg: physical base address of the controller and length of memory mapped
>>    region.
>>
> 
> This looks like you are duplicating the bindings and the code, but
> it's really the same hardware multiple times with minor variations
> that you should be able to describe properly here. Why not make
> three nodes with the same compatible string and have them handled
> by the same code?

Each CMU_BUSx domain of Exynos5433 have different base address as following:
- CMU_BUS0's base address and range : 0x1360_0000 ~ 0x1360_0b04
- CMU_BUS1's base address and range : 0x1480_0000 ~ 0x1480_0b04
- CMU_BUS2's base address and range : 0x1340_0000 ~ 0x1340_0b04

So, I implement CMU_BUSx domain which has each compatible string.

Best Regards,
Chanwoo Choi


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