linux-kernel - Re: [RFC PATCH v2 1/2] mfd: syscon: Support early initialization

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Date:	Wed, 19 Feb 2014 12:44:50 +0100
From:	Michal Simek <monstr@...str.eu>
To:	Lee Jones <lee.jones@...aro.org>
CC:	Michal Simek <michal.simek@...inx.com>,
	linux-arm-kernel@...ts.infradead.org,
	Arnd Bergmann <arnd@...db.de>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	linux-kernel@...r.kernel.org, broonie@...nel.org
Subject: Re: [RFC PATCH v2 1/2] mfd: syscon: Support early initialization

On 02/19/2014 12:41 PM, Lee Jones wrote:
> FAO Arnd, Mark,
> 
>> Some platforms need to get system controller
>> ready as soon as possible.
>> The patch provides early_syscon_initialization
>> which create early mapping for all syscon compatible
>> devices in early_syscon_probe.
>> Regmap is get via syscon_early_regmap_lookup_by_phandle()
>>
>> Regular device probes attach device to regmap
>> via regmap_attach_dev().
>>
>> For early syscon initialization is necessary to extend
>> struct syscon and provide remove function
>> which unmap all early init structures.
>>
>> Signed-off-by: Michal Simek <michal.simek@...inx.com>
>> ---
>>
>> Changes in v2:
>> - Fix bad logic in early_syscon_probe
>> - Fix compilation failure for x86_64 reported by zero day testing system
>> - Regmap change available here
>>   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap.git tags/nodev
>>
>>  drivers/mfd/syscon.c       | 128 +++++++++++++++++++++++++++++++++++++++------
>>  include/linux/mfd/syscon.h |  11 ++++
>>  2 files changed, 122 insertions(+), 17 deletions(-)
> 
> I have the same reservations as last time:
> 
>   http://archive.arm.linux.org.uk/lurker/message/20140212.095424.96cb7281.html
> 
> I believe you were waiting for Arnd and/or Mark to comment.

yes on Arnd because Mark already applied that regmap part.
But of course any input how to get this done will be helpful.

Thanks,
Michal

-- 
Michal Simek, Ing. (M.Eng), OpenPGP -> KeyID: FE3D1F91
w: www.monstr.eu p: +42-0-721842854
Maintainer of Linux kernel - Microblaze cpu - http://www.monstr.eu/fdt/
Maintainer of Linux kernel - Xilinx Zynq ARM architecture
Microblaze U-BOOT custodian and responsible for u-boot arm zynq platform



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