linux-kernel - Re: [PATCH 1/4] clk: select CLKDEV_LOOKUP for COMMON

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <4F902858.9040905@gmail.com>
Date:	Thu, 19 Apr 2012 09:59:36 -0500
From:	Rob Herring <robherring2@...il.com>
To:	Sascha Hauer <s.hauer@...gutronix.de>
CC:	"Turquette, Mike" <mturquette@...com>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	devicetree-discuss@...ts.ozlabs.org,
	Thierry Reding <thierry.reding@...onic-design.de>,
	Rob Herring <rob.herring@...xeda.com>,
	Grant Likely <grant.likely@...retlab.ca>,
	Sascha Hauer <kernel@...gutronix.de>, shawn.guo@...aro.org
Subject: Re: [PATCH 1/4] clk: select CLKDEV_LOOKUP for COMMON_CLK

On 04/18/2012 02:07 AM, Sascha Hauer wrote:
> On Tue, Apr 17, 2012 at 03:13:49PM -0700, Turquette, Mike wrote:
>> On Mon, Apr 9, 2012 at 1:24 PM, Rob Herring <robherring2@...il.com> wrote:
>>> From: Rob Herring <rob.herring@...xeda.com>
>>>
>>> Using the common clock infrastructure without the common clkdev code makes
>>> little sense, so select CLKDEV_LOOKUP for COMMON_CLK.
>>>
>>> Signed-off-by: Rob Herring <rob.herring@...xeda.com>
>>> ---
>>>  drivers/clk/Kconfig |    1 +
>>>  1 files changed, 1 insertions(+), 0 deletions(-)
>>>
>>> diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig
>>> index 165e1fe..f05a60d 100644
>>> --- a/drivers/clk/Kconfig
>>> +++ b/drivers/clk/Kconfig
>>> @@ -12,6 +12,7 @@ config HAVE_MACH_CLKDEV
>>>  config COMMON_CLK
>>>        bool
>>>        select HAVE_CLK_PREPARE
>>> +       select CLKDEV_LOOKUP
>>>        ---help---
>>>          The common clock framework is a single definition of struct
>>>          clk, useful across many platforms, as well as an
>>
>> Hi Rob,
>>
>> I agree that the common clk framework is not particularly useful
>> without clkdev.  However the core code has no dependency on clkdev.
>> Why not just select it from an arch Kconfig, or even make it a
>> dependency based on your own platform clock data/code?
> 
> Selecting it from COMMON_CLK means that the compiler/linker will point
> everybody trying to implement it without CLKDEV into the right
> direction.

Right. That was part of my rationale as well.

The DT clock support is dependent on both options, so without this patch
we'll have to add an otherwise unneeded OF_CLOCK option to select both.

Rob
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/