linux-kernel - Re: [PATCH v2 1/2] clk/zynq/clkc: Add 'fclk-enable' feature

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Message-ID: <ceac2f8e-30b4-415e-b8f3-f2af1270be88@DB9EHSMHS020.ehs.local>
Date:	Tue, 29 Oct 2013 14:04:06 +0100
From:	Michal Simek <michal.simek@...inx.com>
To:	Kumar Gala <galak@...eaurora.org>
CC:	Tomasz Figa <tomasz.figa@...il.com>,
	Sören Brinkmann 
	<soren.brinkmann@...inx.com>,
	Rob Herring <rob.herring@...xeda.com>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Stephen Warren <swarren@...dotorg.org>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Rob Landley <rob@...dley.net>,
	Russell King <linux@....linux.org.uk>,
	Mike Turquette <mturquette@...aro.org>,
	Michal Simek <michal.simek@...inx.com>,
	<linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-doc@...r.kernel.org>, <devicetree@...r.kernel.org>
Subject: Re: [PATCH v2 1/2] clk/zynq/clkc: Add 'fclk-enable' feature

On 10/29/2013 09:26 AM, Kumar Gala wrote:
> 
> On Oct 28, 2013, at 5:17 PM, Tomasz Figa wrote:
> 
>>>>> diff --git a/Documentation/devicetree/bindings/clock/zynq-7000.txt
>>>>> b/Documentation/devicetree/bindings/clock/zynq-7000.txt index
>>>>> d99af878f5d7..11fdd146ec83 100644
>>>>> --- a/Documentation/devicetree/bindings/clock/zynq-7000.txt
>>>>> +++ b/Documentation/devicetree/bindings/clock/zynq-7000.txt
>>>>>
>>>>> @@ -22,6 +22,10 @@ Required properties:
>>>>> Optional properties:
>>>>>  - clocks : as described in the clock bindings
>>>>>  - clock-names : as described in the clock bindings
>>>>>
>>>>> + - fclk-enable : Bit mask to enable FCLKs in cases no proper CCF
>>>>
>>>> Since it's a vendor specific property, it should include vendor
>>>> prefix.
>>>
>>> The whole driver is vendor specific. Should there really be another
>>> prefix for that property?
>>
>> Yes. If a property is introduced just for use by this particular driver 
>> then it must be prepended by a vendor prefix. That's a general rule.
> 
> Most all nodes are vendor specific by definition ;).

Is this really generic rule? I haven't seen/heard any point regarding this on KS.

I don't think we should use prefix here. It is xilinx specific option
but there shouldn't be any problem to use fclk-enable without any prefix.
Because it means we have to also rename ps-clk-frequency.

We are using xlnx prefix for properties which are autogenerated from design tools
which is not even this case.

Thanks,
Michal


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