linux-kernel - Re: [PATCH 00/33] ARM: at91: Switch remaining SoCs and boards to CCF

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Message-ID: <5780166.MMf0Vhnnsu@wuerfel>
Date:	Tue, 01 Jul 2014 18:35:50 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	linux-arm-kernel@...ts.infradead.org
Cc:	Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
	Nicolas Ferre <nicolas.ferre@...el.com>,
	Boris Brezillon <boris.brezillon@...e-electrons.com>,
	Gregory Hermant <gregory.hermant@...ao-systems.com>,
	Jiri Prchal <jiri.prchal@...ignal.cz>,
	Rodolfo Giometti <giometti@...ux.it>,
	Gael Portay <g.portay@...rkiz.com>,
	Joachim Eastwood <manabian@...il.com>,
	linux-kernel@...r.kernel.org,
	Douglas Gilbert <dgilbert@...erlog.com>,
	Fabio Porcedda <fabio.porcedda@...il.com>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Tim Schendekehl <tim.schendekehl@...ite.de>
Subject: Re: [PATCH 00/33] ARM: at91: Switch remaining SoCs and boards to CCF

On Tuesday 01 July 2014 16:12:09 Alexandre Belloni wrote:
> This patch set adds support for the common clock framwork to the remaining atml
> SoCs: at91rm9200, at91sam9260, at91sam9263, at91sam9g45.
> 
> It also defines the necessary main crystal and slow crystal frequencies.
> 
> I couldn't find datasheets for the following boards:
>  - mpa1600
>  - ge863-pro3
>  - animeo_ip
>  - tny_a9260
> 
> For those, I assumed the 32kHz crystal is present on the board as this is the
> most common implementation (only one board doesn't have it). Please correct me
> if this is wrong.
> 
> I could not test at91rm9200 as I don't own any board with that chip.

Looks good overall, but I think this Kconfig snippet should be cleaned
up a little now:

config AT91_USE_OLD_CLK
        bool

config AT91_PMC_UNIT
        bool
        default !ARCH_AT91X40

config COMMON_CLK_AT91
        bool
        default AT91_PMC_UNIT && USE_OF && !AT91_USE_OLD_CLK
        select COMMON_CLK

config OLD_CLK_AT91
        bool
        default AT91_PMC_UNIT && AT91_USE_OLD_CLK


If I read this right, disabling 'USE_OF' results in still using
the old clock interface. Is that intentional? If you want to always
use COMMON_CLK now, the above can probably be simplified to

config AT91_PMC_UNIT
        def_bool !ARCH_AT91X40
	select COMMON_CLK

and all references to AT91_USE_OLD_CLK, COMMON_CLK_AT91 and
OLD_CLK_AT91 be removed.

	Arnd
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