linux-kernel - Re: [PATCH 07/14] mfd: Initialise the AB8500 driver at core

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Date:	Tue, 12 Jun 2012 09:13:52 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	Linus Walleij <linus.walleij@...aro.org>
CC:	grant.likely@...retlab.ca, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, linus.walleij@...ricsson.com,
	arnd@...db.de, Samuel Ortiz <sameo@...ux.intel.com>,
	Mattias WALLIN <mattias.wallin@...ricsson.com>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Subject: Re: [PATCH 07/14] mfd: Initialise the AB8500 driver at core_initcall
 time

On 11/06/12 22:03, Linus Walleij wrote:
> On Mon, Jun 11, 2012 at 5:25 PM, Lee Jones<lee.jones@...aro.org>  wrote:
>
>> The AB8500 is soon to have its own IRQ domain. For this to be useful
>> the driver needs to be initialised earlier in the boot sequence. Here
>> we move initialisation forward from arch_initcall to core_initcall time.
>
> I don't understand why using IRQ domain makes it necessary to
> initialize the driver earlier in the init process. Please explain to me,
> I need tutoring here.

Perhaps I need to invest some time into deferring each user's probe()s 
instead. Leave it with me I'll do some investigation.

-- 
Lee Jones
Linaro ST-Ericsson Landing Team Lead
M: +44 77 88 633 515
Linaro.org │ Open source software for ARM SoCs
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