linux-kernel - Re: [PATCH] clk: Add device tree binding to clk-fixed-factor

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Date:	Fri, 12 Apr 2013 11:46:12 +0200
From:	Gregory CLEMENT <gregory.clement@...e-electrons.com>
To:	Christian Ruppert <christian.ruppert@...lis.com>
CC:	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	Mike Turquette <mturquette@...aro.org>,
	linux-doc@...r.kernel.org, devicetree-discuss@...ts.ozlabs.org,
	Rob Herring <rob.herring@...xeda.com>,
	Grant Likely <grant.likely@...retlab.ca>,
	Rob Landley <rob@...dley.net>,
	Vineet Gupta <Vineet.Gupta1@...opsys.com>
Subject: Re: [PATCH] clk: Add device tree binding to clk-fixed-factor

On 04/12/2013 11:12 AM, Christian Ruppert wrote:
> On Fri, Apr 12, 2013 at 11:04:51AM +0200, Gregory CLEMENT wrote:
>> On 04/12/2013 08:54 AM, Christian Ruppert wrote:
>>> On Thu, Apr 11, 2013 at 06:26:07PM +0200, Gregory CLEMENT wrote:
>>>> On 04/11/2013 11:19 AM, Christian Ruppert wrote:
>>>>> Hi Gregory,
>>>>>
>>>>> Since there doesn't seem to be anyone opposing this feature I just
>>>>> checked your patch and after adding the CLK_OF_DECLARE macro in the end
>>>>> it works well for us. Tell me if you would like to rebase and resubmit
>>>>> your patch or if I should follow up on our own.
>>>>
>>>> I can rebase and resubmit my patch, it's pretty straightforward.
>>>> The problem was the lack of user in the kernel. And by user I mean
>>>> a driver using these functions. Usually a new function enter in the
>>>> kernel only if there are users for it inside the kernel so if you plan
>>>> to submit a driver using this piece of code, then I see no reason
>>>> to not get it.
>>>
>>> If you add the line
>>>
>>> CLK_OF_DECLARE(fixed_factor_clk, "fixed-factor-clkdiv", 
>>
>> Why did you add the div suffix?
>>
>> There is nothing in the function which prevent to have "mul" greater than
>> "div" and hence having a multiplicative factor.
>>
>> I think that this suffix is misleading.
> 
> You are right, let's remove it.

Great, I am going to send the patch in a couple of minutes.
That means that you will have to ammend your file
arch/arc/boot/dts/abilis_tb10x.dtsi

and for the clock named cpu_clk and ahb_clk you will have to rename
fixed-factor-clkdiv to fixed-factor-clock

Thanks,

> 
>> [...]
> 


-- 
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
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