linux-kernel - Re: [PATCH v5 2/2] clk: intel: Add CGU clock driver for a new SoC

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Date:   Wed, 4 Mar 2020 14:18:08 +0800
From:   "Tanwar, Rahul" <rahul.tanwar@...ux.intel.com>
To:     Andy Shevchenko <andriy.shevchenko@...el.com>
Cc:     Randy Dunlap <rdunlap@...radead.org>, mturquette@...libre.com,
        sboyd@...nel.org, robh@...nel.org, mark.rutland@....com,
        linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, qi-ming.wu@...el.com,
        yixin.zhu@...ux.intel.com, cheol.yong.kim@...el.com,
        rtanwar <rahul.tanwar@...el.com>
Subject: Re: [PATCH v5 2/2] clk: intel: Add CGU clock driver for a new SoC


On 3/3/2020 6:09 PM, Andy Shevchenko wrote:
> On Tue, Mar 03, 2020 at 11:37:23AM +0800, Tanwar, Rahul wrote:
>> On 27/2/2020 6:02 PM, Andy Shevchenko wrote:
>>> On Thu, Feb 27, 2020 at 03:19:26PM +0800, Tanwar, Rahul wrote:
>>>> On 19/2/2020 3:59 PM, Randy Dunlap wrote:
>>>>> On 2/18/20 11:40 PM, Rahul Tanwar wrote:
>>>>>
>>>>>> +config CLK_LGM_CGU
>>>>>> +	depends on (OF && HAS_IOMEM) || COMPILE_TEST
>>>>> This "depends on" looks problematic to me. I guess we shall see when
>>>>> all the build bots get to it.
>>>> At the moment, i am not able to figure out possible problems in this..
>>> COMPILE_TEST should be accompanied by non-generic dependency.
>>> There is none.
>>>
>>> So, I quite agree with Randy.
>> I see COMPILE_TEST is mostly ORed with ARCH_xx. How about below?
>>
>> depends on OF && HAS_IOMEM && (CONFIG_X86 || COMPILE_TEST)
> How about to leave logical parts separately?
> How is OF related to architecture?

OF is not related to architecture. Driver depends on OF.
In the past, many build/linker issues were reported due to OF
& HAS_IOMEM dependencies in the code. Please see [1] & [2]. So
to be safe this time, i am adding these dependencies here.

> On top of that, is this code only for x86 for sure?
>

Yes, this is a totally new IP for x86 based SoC. No plans
of using same IP/driver for any other arch based SoCs.


[1] https://lkml.org/lkml/2019/12/3/613
[2] https://lkml.org/lkml/2019/12/11/1733